Patent Publication Number: US-2022217022-A1

Title: Sequence Generation Method and Apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Application No. PCT/CN2020/114611, filed on Sep. 10, 2020, which claims priority to Chinese Patent Application No. 201910869280.2, filed on Sep. 12, 2019. The disclosures of the aforementioned applications are herein incorporated by reference in their entireties. 
    
    
     TECHNICAL FIELD 
     Embodiments of this application relate to the communications field, and in particular, to a sequence generation method and an apparatus. 
     BACKGROUND 
     Communications devices are more widely used over the past few years. For example, a communications device usually provides network access to, for example, a local area network or the internet. Other communications devices may perform wireless communication with the communications device that provides network access. Some communications devices comply with some industry standards such as Institute of Electrical and Electronics Engineers standards. 
     As a quantity of communications devices increase, people seek to improve capacities, reliability, and efficiency of the communications devices. Systems and methods for improving capacities, reliability, or efficiency of the communications devices may be helpful. 
     SUMMARY 
     Embodiments of this application provide a sequence generation method and an apparatus, so that a matrix-mapped EHT LTF sequence in a PPDU has a low PAPR value. 
     According to a first aspect, an embodiment of this application provides a sequence generation method, including: obtaining a matrix-mapped EHT LTF sequence by multiplying a predefined EHT LTF sequence by a P matrix, where the P matrix is an n×n matrix, and n is greater than 8; and sending the matrix-mapped EHT LTF sequence. 
     Optionally, for the P matrix in the first aspect, refer to various P matrices in specific embodiments. 
     According to a second aspect, an embodiment of this application provides a sequence processing method, including: receiving a matrix-mapped EHT LTF sequence, where the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8; and performing channel estimation based on the matrix-mapped EHT LTF sequence. 
     Optionally, for the P matrix in the second aspect, refer to various P matrices in specific embodiments. 
     According to a third aspect, an embodiment of this application provides a sequence generation method, including: generating a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8; and sending the PPDU. 
     Optionally, for the P matrix in the third aspect, refer to various P matrices in specific embodiments. 
     According to a fourth aspect, an embodiment of this application provides a sequence processing method, including: receiving a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8; and performing channel estimation based on the matrix-mapped EHT LTF sequence. 
     Optionally, for the P matrix in the fourth aspect, refer to various P matrices in specific embodiments. 
     According to a fifth aspect, an embodiment of this application provides a sequence generation apparatus, where the sequence generation apparatus includes modules configured to perform the method according to the first aspect or any possible implementation of the first aspect. 
     According to a sixth aspect, an embodiment of this application provides a sequence processing apparatus, where the sequence processing apparatus includes modules configured to perform the method according to the second aspect or any possible implementation of the second aspect. 
     According to a seventh aspect, an embodiment of this application provides a sequence generation apparatus, where the sequence generation apparatus includes modules configured to perform the method according to the third aspect or any possible implementation of the third aspect. 
     According to an eighth aspect, an embodiment of this application provides a sequence processing apparatus, where the sequence processing apparatus includes modules configured to perform the method according to the fourth aspect or any possible implementation of the fourth aspect. 
     According to a ninth aspect, an embodiment of this application provides a computer-readable storage medium, configured to store a computer program. The computer program includes instructions used to perform the first aspect or any possible implementation of the first aspect, instructions used to perform the second aspect or any possible implementation of the second aspect, instructions used to perform the third aspect or any possible implementation of the third aspect, or instructions used to perform the fourth aspect or any possible implementation of the fourth aspect. 
     According to a tenth aspect, an embodiment of this application provides a computer program. The computer program includes instructions used to perform the first aspect or any possible implementation of the first aspect, instructions used to perform the second aspect or any possible implementation of the second aspect, instructions used to perform the third aspect or any possible implementation of the third aspect, or instructions used to perform the fourth aspect or any possible implementation of the fourth aspect. 
     According to an eleventh aspect, an embodiment of this application provides a communications system, where the communications system includes the sequence generation apparatus provided in the fifth aspect and the sequence processing apparatus provided in the sixth aspect. 
     According to a twelfth aspect, an embodiment of this application provides a communications system, where the communications system includes the sequence generation apparatus provided in the seventh aspect and the sequence processing apparatus provided in the eighth aspect. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  shows a communications system to which an embodiment of this application is applied; 
         FIG. 2  is a diagram of a system; 
         FIG. 3  is a flowchart of a sequence generation method according to an embodiment of this application; 
         FIG. 4  is a diagram of a structure of a sequence generation apparatus; and 
         FIG. 5  is a diagram of a structure of a sequence receiving apparatus. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following describes the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. 
     It should be understood that, the technical solutions of the embodiments of this application may be applied to various communications systems, such as: a Wi-Fi wireless communications system, a global system for mobile communications (global system for mobile communications, GSM) system, a code division multiple access (code division multiple access, CDMA) system, a wideband code division multiple access (wideband code division multiple access, WCDMA) system, a general packet radio service (general packet radio service, GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD) system, a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, WiMAX) communications system, other future evolved systems, or various other wireless communications system using a radio access technology. 
       FIG. 1  shows a communications system to which an embodiment of this application is applied. The communications system includes a network device and at least one terminal device located within coverage of the network device. The network device may provide communication coverage for a specific geographic area, and communicate with the terminal device located in the coverage area. The network device may be a base transceiver station (base transceiver station, BTS) in a GSM system or a code division multiple access (code division multiple access, CDMA) system, may be a nodeB (nodeB, NB) in a WCDMA system, may be an evolved NodeB (evolved NodeB, eNB, or eNodeB) in an LTE system, may be a radio controller in a cloud radio access network (cloud radio access network, CRAN), or may be a relay station, an access point AP, a vehicle-mounted device, a wearable device, a network-side device in a future network, or the like. The terminal device may be mobile or fixed, and the terminal device may be a station STA, an access terminal, user equipment (user equipment, UE), a subscriber unit, a subscriber station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a wireless communications device, a user agent, a user apparatus, or the like. 
     Specifically, the embodiments of this application relate to a sequence generation method and a sequence generation apparatus. A sequence generated in the embodiments of this application has a low PAPR value. 
     Technical terms used in the embodiments of this application are first described as follows:
         PPDU: PHY Protocol Data Unit, physical layer protocol data unit; and   EHT LTF: Extremely High Throughput Long Training Field, extremely high throughput long training field.       

     The following describes the sequence generation apparatus in the embodiments of this application by using  FIG. 2  as an example. 
       FIG. 2  is a diagram of a system. The system includes a sending device  100  and a receiving device  200 . The sending device  100  is configured to generate and send a sequence with a low PAPR value, and the receiving device  200  is configured to receive the sequence and perform channel estimation based on the sequence. 
     As shown in  FIG. 2 , the sending device  100  includes the following modules. 
     A sequence storage/generation module  101  is configured to store or generate a predefined data sequence (in the embodiments of this application, a sequence of data locations is collectively referred to as a data sequence), where the predefined data sequence includes a plurality of different sequences in different modes and different bandwidths, the different bandwidths may include a 20 M bandwidth, a 40 M bandwidth, an 80 M bandwidth, a 160 M bandwidth, a 320 M bandwidth, a 160M+160 M bandwidth, and the like, and the different modes may include a 1x mode, a 2x mode, a 4x mode, and the like. For example, the plurality of different sequences in the different modes and the different bandwidths include: a sequence in the 20 M bandwidth and the 1x mode, a sequence in the 20 M bandwidth and the 2x mode, a sequence in the 20 M bandwidth and the 4x mode, a sequence in the 40 M bandwidth and the 1x mode, a sequence in the 40 M bandwidth and the 2x mode, a sequence in the 40 M bandwidth and the 4x mode, . . . , a sequence in the 320 M bandwidth and the 1x mode, a sequence in the 320 M bandwidth and the 2x mode, and a sequence in the 320 M bandwidth and the 4x mode. Optionally, the data sequence is an EHT LTF sequence, that is, the sequence storage module  101  stores a predefined EHT LTF sequence. 
     A pilot generation module  102  is configured to generate a pilot sequence, where the pilot sequence is used to track a phase or a frequency offset of a transmit signal. 
     A pilot insertion module  103  is configured to insert the pilot sequence into the data sequence. In other words, the pilot insertion module  103  is configured to combine the pilot sequence and the data sequence. 
     A matrix mapping module  104  is configured to apply a matrix to the pilot sequence and the data sequence that are combined, to generate a matrix-mapped sequence. The matrix mapping module  104  includes a first matrix and a second matrix, where the first matrix provides a mapping for the data sequence and the second matrix provides a mapping for the pilot sequence. In other words, the first matrix is applied to the data sequence and the second matrix is applied to the pilot sequence. For convenience, the first matrix may be referred to as a P matrix, where the P matrix is an n×n matrix; and the second matrix may be referred to as an R matrix, where the R matrix includes x replicas of a first row of the P matrix, and x is a quantity of spatial streams. 
     In an example, applying the P matrix to the EHT LTF sequence is specifically multiplying the EHT LTF sequence by an element in the P matrix, for example, multiplying the EHT LTF sequence by each row of the P matrix, to obtain a plurality of matrix-mapped sequences, where the plurality of matrix-mapped sequences is spatially mapped to a plurality of different spatial streams for sending. 
     The n×n P matrix (n is greater than 8) provided in this embodiment of this application is intended to ensure that when the quantity of spatial streams increases to more than 8, a matrix-mapped sequence sent in each spatial stream needs to remain orthogonal and has a low PAPR value. 
     In this embodiment of this application, when the quantity of spatial streams is n and n is an even number, the n×n P matrix is applied. When the quantity of spatial streams is n and n is an odd number, an (n+1)×(n+1) P matrix is applied. 
     The following describes P matrices for different quantities of spatial streams provided in this embodiment of this application. The P matrix has a plurality of variations for each spatial stream. 
     (1) P Matrix for 9 or 10 Spatial Streams 
     When the quantity of spatial streams is 9 or 10, the P matrix provided in this embodiment of this application is: 
     
       
         
           
             
               
                 
                   
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                       ⁢ 
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                       × 
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                   = 
                   
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                             - 
                             
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                                 5 
                                 × 
                                 5 
                               
                             
                           
                         
                       
                     
                     ] 
                   
                 
               
               
                 
                   ( 
                   11 
                   ) 
                 
               
             
             
               
                 where 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
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                   ( 
                   12 
                   ) 
                 
               
             
           
         
       
     
     P 5×5  in the foregoing formula (12) is obtained by multiplying the second column of P original  by −1, where P original  is expressed as follows: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       original 
                     
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                   ( 
                   13 
                   ) 
                 
               
             
           
         
       
     
     For P 5×5  in the foregoing formula (11), refer to the foregoing formula (12). P 5×5  in the formula (12) is obtained by multiplying the second column of P original  in the formula (13) by −1. The foregoing is only an example of a P original  matrix when the quantity of spatial streams is 9 or 10 provided in this embodiment of this application. 
     Optionally, this embodiment of this application further provides another P 10-10  matrix when the quantity of spatial streams is 9 or 10: 
     
       
         
           
             
               
                 
                   
                     P 
                     
                       1 
                       ⁢ 
                       0 
                       × 
                       1 
                       ⁢ 
                       0 
                     
                   
                   = 
                   
                     [ 
                     
                       
                         
                           
                             P 
                             
                               5 
                               × 
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                               5 
                               × 
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                                 5 
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                     ] 
                   
                 
               
               
                 
                   ( 
                   11 
                   ) 
                 
               
             
           
         
       
     
     P 5×5  may be obtained by multiplying any one column of P original  by −1, or P 5×5  may be obtained by multiplying any plurality of columns of P original  by −1, where the any plurality of columns herein do not include all columns. For example, the second column and the third column of P original  are multiplied by −1, to obtain P 5×5 , but not all columns from the first column to the fifth column of P original  are multiplied by −1. 
     A matrix-mapped sequence obtained through mapping by using the foregoing P 10-10  has a low PAPR value. In the 80 M bandwidth and the 4x mode, a PAPR value of the matrix-mapped sequence obtained through mapping by using the foregoing P 10×10  is 6.2771. When Fourier matrix mapping is directly applied, or Fourier matrix mapping in which one or more columns are multiplied by −1 is applied, a PAPR value of the obtained matrix-mapped sequence is 6.2851. It is clear that the PAPR value of the obtained matrix-mapped sequence is lower by using P 10×10  provided in this embodiment of this application to map the EHT LTF sequence. Similarly, in the 320 M bandwidth and the 4x mode, a PAPR value of the matrix-mapped sequence obtained through mapping by using the foregoing P 10×10  is 9.2297. When Fourier matrix mapping is directly applied, or Fourier matrix mapping in which one or more columns are multiplied by −1 is applied, a PAPR value of the obtained matrix-mapped sequence is 9.2653. It is clear that the PAPR value of the obtained matrix-mapped sequence is lower by using P 10×10  provided in this embodiment of this application to map the EHT LTF sequence. 
     (2) P Matrix for 11 or 12 Spatial Streams 
     When the quantity of spatial streams is 11 or 12, the P matrix provided in this embodiment of this application is: 
     
       
         
           
             
               
                 
                   
                     P 
                     
                       1 
                       ⁢ 
                       2 
                       × 
                       1 
                       ⁢ 
                       2 
                     
                   
                   = 
                   
                     [ 
                     
                       
                         
                           
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                               6 
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                                 6 
                                 × 
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                     ] 
                   
                 
               
               
                 
                   ( 
                   21 
                   ) 
                 
               
             
             
               
                 where 
               
               
                 
                     
                 
               
             
             
               
                 
                   
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                     ] 
                   
                 
               
               
                 
                   ( 
                   22 
                   ) 
                 
               
             
             
               
                 
                   
                     
                       P 
                       
                         3 
                         × 
                         3 
                       
                     
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                       [ 
                       
                         
                           
                             
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                   , 
                   
                       
                   
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                       and 
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                     = 
                     
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                       ⁡ 
                       
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                             / 
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                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   23 
                   ) 
                 
               
             
           
         
       
     
     The foregoing P 3×3  is obtained by multiplying the second column of the following P original  by −1, where P original  is expressed as follows: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       original 
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
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                                 2 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             3 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   24 
                   ) 
                 
               
             
           
         
       
     
     P 3×3  in the foregoing formula (23) is obtained by multiplying the second column of P original  in the formula (24) by −1. P 3×3  in (23) is substituted into the formula (22), to obtain P 6×6 . Then, P 6-6  in (23) is substituted into the formula (21) to obtain P 12-12 . 
     Optionally, this embodiment of this application further provides another P 12×12  matrix when the quantity of spatial streams is 11 or 12, for example, in the foregoing formula (21) to formula (24), P 3×3  in (23) may be obtained by multiplying any one column of P original  in the formula (24) by −1. Multiplying the second column by −1 is not limited thereto. Alternatively, P 3×3  in (23) may be obtained by multiplying any plurality of columns of P original  in the formula (24) by −1, where the any plurality of columns herein do not include all columns. For example, both the second column and the third column of P original  in (24) are multiplied by −1 to obtain P 3×3  in (23), but not all columns from the first to the third columns of P original  in (24) are multiplied by −1. 
     A matrix-mapped sequence obtained through mapping by using the foregoing P 12×12  has a low PAPR value. In the 80 M bandwidth and the 4x mode, a PAPR value of the matrix-mapped sequence obtained through mapping by using the foregoing P 12×12  is 6.2369. When Fourier matrix mapping is directly applied, or Fourier matrix mapping in which one or more columns are multiplied by −1 is applied, a PAPR value of the obtained matrix-mapped sequence is 6.3003. It is clear that the PAPR value of the obtained matrix-mapped sequence is lower by using P 10×10  provided in this embodiment of this application to map the EHT LTF sequence. Similarly, in the 320 M bandwidth and the 4x mode, a PAPR value of the matrix-mapped sequence obtained through mapping by using the foregoing P 12×12  is 9.2236. When Fourier matrix mapping is directly applied, or Fourier matrix mapping in which one or more columns are multiplied by −1 is applied, a PAPR value of the obtained matrix-mapped sequence is 9.2636. It is clear that the PAPR value of the obtained matrix-mapped sequence is lower by using P 12×12  provided in this embodiment of this application to map the EHT LTF sequence. 
     When the quantity of spatial streams is 11 or 12, this embodiment of this application further provides the following P matrix: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       
                         1 
                         ⁢ 
                         2 
                         × 
                         1 
                         ⁢ 
                         2 
                       
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               P 
                               
                                 6 
                                 × 
                                 6 
                               
                             
                           
                           
                             
                               P 
                               
                                 6 
                                 × 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               P 
                               
                                 6 
                                 × 
                                 6 
                               
                             
                           
                           
                             
                               - 
                               
                                 P 
                                 
                                   6 
                                   × 
                                   6 
                                 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   ⁢ 
                   
                     
 
                   
                 
               
               
                 
                   ( 
                   31 
                   ) 
                 
               
             
             
               
                 where 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       P 
                       
                         6 
                         × 
                         6 
                       
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   5 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   5 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   5 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   5 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   5 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   5 
                                 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             6 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   32 
                   ) 
                 
               
             
           
         
       
     
     P 6×6  in the foregoing formula (32) is obtained by multiplying the second column and the sixth column of P original  in the following formula (33) by −1, where P original  is expressed as follows: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       original 
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 5 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             6 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   33 
                   ) 
                 
               
             
           
         
       
     
     Optionally, this embodiment of this application further provides another P 12×12  matrix when the quantity of spatial streams is 11 or 12, for example, in the foregoing formula (31) to formula ( 33 ), P 6×6  in (32) may be obtained by multiplying any one column of P original  in the formula (33) by −1. Alternatively, P 6×6  in (32) may be obtained by multiplying any plurality of columns P original  in the formula (33) by −1, where the any plurality of columns herein do not include all columns. In addition to that the second column and the sixth column in the formula (32) are multiplied by −1, any other plurality of columns may be multiplied by −1. For example, the second column, the third column, and the fourth column of P original  in the formula (33) are multiplied by −1. 
     A matrix-mapped sequence obtained through mapping by using the foregoing P 12×12  has a low PAPR value. In the 80 M bandwidth and the 4x mode, a PAPR value of the matrix-mapped sequence obtained through mapping by using the foregoing P 12×12  is 6.2851. When Fourier matrix mapping is directly applied, or Fourier matrix mapping in which one or more columns are multiplied by −1 is applied, a PAPR value of the obtained matrix-mapped sequence is 6.3003. It is clear that the PAPR value of the obtained matrix-mapped sequence is lower by using P 12×12  provided in this embodiment of this application to map the EHT LTF sequence. Similarly, in the 320 M bandwidth and the 4x mode, a PAPR value of the matrix-mapped sequence obtained through mapping by using the foregoing P 12×12  is 9.2499. When Fourier matrix mapping is directly applied, or Fourier matrix mapping in which one or more columns are multiplied by −1 is applied, a PAPR value of the obtained matrix-mapped sequence is 9.2636. It is clear that the PAPR value of the obtained matrix-mapped sequence is lower by using P 12×12  provided in this embodiment of this application to map the EHT LTF sequence. 
     (3) P matrix for 13 or 14 Spatial Streams 
     When the quantity of spatial streams is 13 or 14, this embodiment of this application provides the following P matrix: 
     
       
         
           
             
               
                 
                   
                     P 
                     
                       1 
                       ⁢ 
                       4 
                       × 
                       1 
                       ⁢ 
                       4 
                     
                   
                   = 
                   
                     [ 
                     
                       
                         
                           
                             P 
                             
                               7 
                               × 
                               7 
                             
                           
                         
                         
                           
                             P 
                             
                               7 
                               × 
                               7 
                             
                           
                         
                       
                       
                         
                           
                             P 
                             
                               7 
                               × 
                               7 
                             
                           
                         
                         
                           
                             - 
                             
                               P 
                               
                                 7 
                                 × 
                                 7 
                               
                             
                           
                         
                       
                     
                     ] 
                   
                 
               
               
                 
                   ( 
                   41 
                   ) 
                 
               
             
             
               
                 where 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       P 
                       
                         7 
                         × 
                         7 
                       
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 6 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             7 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   42 
                   ) 
                 
               
             
           
         
       
     
     P 7×7  in the foregoing formula (42) is obtained by multiplying the second column and the sixth column of P original  in the following formula (43) by −1, where P original  is expressed as follows: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       original 
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 6 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 6 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             7 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   43 
                   ) 
                 
               
             
           
         
       
     
     Optionally, this embodiment of this application further provides another P 14×14  matrix when the quantity of spatial streams is 13 or 14, for example, in the foregoing formula (41) to formula (43), P 7×7  in the formula (42) may be obtained by multiplying any one column of P original  in the formula (43) by −1. Alternatively, P 7×7  in the formula (42) may be obtained by multiplying any plurality of columns of P original  in the formula (43) by −1, where the any plurality of columns herein do not include all columns. In addition to that the second column and the sixth column in the formula (42) are multiplied by −1, any other plurality of columns may be multiplied by −1. For example, the second column, the third column, and the fourth column of P original  in the formula (43) are multiplied by −1. 
     A matrix-mapped sequence obtained through mapping by using the foregoing P 14×14  has a low PAPR value. In the 80 M bandwidth and the 4x mode, a PAPR value of the matrix-mapped sequence obtained through mapping by using the foregoing P 14×14  is 6.3115. When Fourier matrix mapping is directly applied, or Fourier matrix mapping in which one or more columns are multiplied by −1 is applied, a PAPR value of the obtained matrix-mapped sequence is 6.3115. It is clear that the PAPR value of the obtained matrix-mapped sequence is lower by using P 14×14  provided in this embodiment of this application to map the EHT LTF sequence. Similarly, in the 320 M bandwidth and the 4x mode, a PAPR value of the matrix-mapped sequence obtained through mapping by using the foregoing P 14×14  is 9.2594. When Fourier matrix mapping is directly applied, or Fourier matrix mapping in which one or more columns are multiplied by −1 is applied, a PAPR value of the obtained matrix-mapped sequence is 9.2611. It is clear that the PAPR value of the obtained matrix-mapped sequence is lower by using P 14×14  provided in this embodiment of this application to map the EHT LTF sequence. 
     (4) P Matrix for 17 or 18 Spatial Streams 
     When the quantity of spatial streams is 17 or 18, this embodiment of this application provides the following P matrix: 
     
       
         
           
             
               
                 
                   
                       
                   
                   ⁢ 
                   
                     
                       P 
                       
                         1 
                         ⁢ 
                         8 
                         × 
                         1 
                         ⁢ 
                         8 
                       
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               P 
                               
                                 9 
                                 × 
                                 9 
                               
                             
                           
                           
                             
                               P 
                               
                                 9 
                                 × 
                                 9 
                               
                             
                           
                         
                         
                           
                             
                               P 
                               
                                 9 
                                 × 
                                 9 
                               
                             
                           
                           
                             
                               - 
                               
                                 P 
                                 
                                   9 
                                   × 
                                   9 
                                 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                 
               
               
                 
                   ( 
                   51 
                   ) 
                 
               
             
             
               
                 
                   
                       
                   
                   ⁢ 
                   where 
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     P 
                     
                       9 
                       × 
                       9 
                     
                   
                   = 
                 
               
               
                 
                   ( 
                   52 
                   ) 
                 
               
             
             
               
                 
                   
                     [ 
                     
                       
                         
                           
                             w 
                             
                               0 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 0 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               0 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               0 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               0 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 0 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               0 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               0 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               0 
                               * 
                               8 
                             
                           
                         
                       
                       
                         
                           
                             w 
                             
                               1 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 1 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               1 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               1 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               1 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 1 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               1 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               1 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               1 
                               * 
                               8 
                             
                           
                         
                       
                       
                         
                           
                             w 
                             
                               2 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 2 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               2 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               2 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               2 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 2 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               2 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               2 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               2 
                               * 
                               8 
                             
                           
                         
                       
                       
                         
                           
                             w 
                             
                               3 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 3 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               3 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               3 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               3 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 3 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               3 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               3 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               3 
                               * 
                               8 
                             
                           
                         
                       
                       
                         
                           
                             w 
                             
                               4 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 4 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               4 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               4 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               4 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 4 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               4 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               4 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               4 
                               * 
                               8 
                             
                           
                         
                       
                       
                         
                           
                             w 
                             
                               5 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 5 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               5 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               5 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               5 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 5 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               5 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               5 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               5 
                               * 
                               8 
                             
                           
                         
                       
                       
                         
                           
                             w 
                             
                               6 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 6 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               6 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               6 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               6 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 6 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               6 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               6 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               6 
                               * 
                               8 
                             
                           
                         
                       
                       
                         
                           
                             w 
                             
                               7 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 7 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               7 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               7 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               7 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 7 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               7 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               7 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               7 
                               * 
                               8 
                             
                           
                         
                       
                       
                         
                           
                             w 
                             
                               8 
                               * 
                               0 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 8 
                                 * 
                                 1 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               8 
                               * 
                               2 
                             
                           
                         
                         
                           
                             w 
                             
                               8 
                               * 
                               3 
                             
                           
                         
                         
                           
                             w 
                             
                               8 
                               * 
                               4 
                             
                           
                         
                         
                           
                             - 
                             
                               w 
                               
                                 8 
                                 * 
                                 5 
                               
                             
                           
                         
                         
                           
                             w 
                             
                               8 
                               * 
                               6 
                             
                           
                         
                         
                           
                             w 
                             
                               8 
                               * 
                               7 
                             
                           
                         
                         
                           
                             w 
                             
                               8 
                               * 
                               8 
                             
                           
                         
                       
                     
                     ] 
                   
                   , 
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                       
                   
                   ⁢ 
                   and 
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                       
                   
                   ⁢ 
                   
                     w 
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             9 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                     
                 
               
             
           
         
       
     
     P 9×9  in the foregoing formula (52) is obtained by multiplying the second column and the sixth column of P original  in the following formula (53) by −1, where P original  is expressed as follows: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       original 
                     
                     = 
                     
                       
 
                     
                     ⁢ 
                     
                       [ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 8 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 8 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 8 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 8 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 8 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 8 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 8 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 8 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 8 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                     
 
                   
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             9 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   53 
                   ) 
                 
               
             
           
         
       
     
     Optionally, this embodiment of this application further provides another P 14×14  matrix when the quantity of spatial streams is 17 or 18, for example, in the foregoing formula (51) to formula (53), P 9×9  in the formula (52) may be obtained by multiplying any one column of P original  in the formula (53) by −1. Alternatively, P 9×9  in the formula (52) may be obtained by multiplying any plurality of columns of P original  in the formula (53) by −1, where the any plurality of columns herein do not include all columns. In addition to that the second column and the sixth column in the formula (52) are multiplied by −1, any other plurality of columns may be multiplied by −1. For example, the second column, the third column, and the fourth column of P original  in the formula (53) are multiplied by −1. 
     (5) P Matrix for 21 or 22 Spatial Streams 
     When the quantity of spatial streams is 21 or 22, this embodiment of this application provides the following P matrix: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       
                         22 
                         × 
                         22 
                       
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               P 
                               
                                 11 
                                 × 
                                 11 
                               
                             
                           
                           
                             
                               P 
                               
                                 11 
                                 × 
                                 11 
                               
                             
                           
                         
                         
                           
                             
                               P 
                               
                                 11 
                                 × 
                                 11 
                               
                             
                           
                           
                             
                               - 
                               
                                 P 
                                 
                                   11 
                                   × 
                                   11 
                                 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   ⁢ 
                   
                     
 
                   
                 
               
               
                 
                   ( 
                   61 
                   ) 
                 
               
             
             
               
                 where 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       P 
                       
                         11 
                         × 
                         11 
                       
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 10 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                       
                   
                   ⁢ 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             11 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   62 
                   ) 
                 
               
             
           
         
       
     
     P 11×11  in the foregoing formula (62) is obtained by multiplying the second column, the sixth column, and the tenth column of P original  in the following formula (63) by −1, where P original  is expressed as follows: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       original 
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 10 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 10 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                       
                   
                   ⁢ 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             11 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   63 
                   ) 
                 
               
             
           
         
       
     
     Optionally, this embodiment of this application further provides another P 22×22  matrix when the quantity of spatial streams is 21 or 22, for example, in the foregoing formula (61) to formula (63), P 11×11  in the formula (62) may be obtained by multiplying any one column of P original  in the formula (63) by −1. Alternatively, P 11×11  in the formula (62) may be obtained by multiplying any plurality of columns of P original  in the formula (63) by −1, where the any plurality of columns herein do not include all columns. In addition to that the second column, the sixth column, and the tenth column in the formula (62) are multiplied by −1, any other plurality of columns may be multiplied by −1. For example, the second column, the third column, and the fourth column of P original  in the formula (63) are multiplied by −1. 
     (6) P Matrix for 25 or 26 Spatial Streams 
     When the quantity of spatial streams is 25 or 26, the following P matrix provided in this embodiment of this application is: 
     
       
         
           
             
               
                 
                   
                     P 
                     
                       2 
                       ⁢ 
                       6 
                       × 
                       2 
                       ⁢ 
                       6 
                     
                   
                   = 
                   
                     [ 
                     
                       
                         
                           
                             P 
                             
                               1 
                               ⁢ 
                               3 
                               × 
                               1 
                               ⁢ 
                               3 
                             
                           
                         
                         
                           
                             P 
                             
                               1 
                               ⁢ 
                               3 
                               × 
                               1 
                               ⁢ 
                               3 
                             
                           
                         
                       
                       
                         
                           
                             P 
                             
                               1 
                               ⁢ 
                               3 
                               × 
                               1 
                               ⁢ 
                               3 
                             
                           
                         
                         
                           
                             - 
                             
                               P 
                               
                                 1 
                                 ⁢ 
                                 3 
                                 × 
                                 1 
                                 ⁢ 
                                 3 
                               
                             
                           
                         
                       
                     
                     ] 
                   
                 
               
               
                 
                   ( 
                   71 
                   ) 
                 
               
             
             
               
                 where 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       P 
                       
                         13 
                         × 
                         13 
                       
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   11 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   11 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   11 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 12 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   12 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   12 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   12 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 12 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   , 
                   
                       
                   
                   ⁢ 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           
                             π 
                             / 
                             13 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   72 
                   ) 
                 
               
             
           
         
       
     
     P 13×13  in the foregoing formula (72) is obtained by multiplying the second column, the sixth column, and the tenth column of P original  in the following formula (73) by −1, where P original  is expressed as follows: 
     
       
         
           
             
               
                 P 
                 original 
               
               = 
               
                 [ 
                 
                   
                     
                       
                         w 
                         
                           0 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           1 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           1 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           2 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           2 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           3 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           3 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           4 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           4 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           5 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           5 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           6 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           6 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           7 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           7 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           8 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           8 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           9 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           9 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           10 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           10 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           0 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           11 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           11 
                           * 
                           12 
                         
                       
                     
                   
                   
                     
                       
                         w 
                         
                           12 
                           * 
                           0 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           1 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           2 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           3 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           4 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           5 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           6 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           7 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           8 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           9 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           10 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           11 
                         
                       
                     
                     
                       
                         w 
                         
                           12 
                           * 
                           12 
                         
                       
                     
                   
                 
                 ] 
               
             
             , 
             
                 
             
             ⁢ 
             
               
                 and 
                 ⁢ 
                 
                     
                 
                 ⁢ 
                 w 
               
               = 
               
                 exp 
                 ⁡ 
                 
                   ( 
                   
                     
                       - 
                       j 
                     
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     2 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       π 
                       / 
                       13 
                     
                   
                   ) 
                 
               
             
           
         
       
     
     Optionally, this embodiment of this application further provides another P 26×26  matrix when the quantity of spatial streams is 25 or 26, for example, in the foregoing formula (71) to formula (73), P 13×13  in the formula (72) may be obtained by multiplying any one column of P original  in the formula (73) by −1. Alternatively, P 13×13  in the formula (72) may be obtained by multiplying any plurality of columns of P original  in the formula (73) by −1, where the any plurality of columns herein do not include all columns. In addition to that the second column, the sixth column, and the tenth column in the formula (72) are multiplied by −1, any other plurality of columns may be multiplied by −1. For example, the second column, the third column, and the fourth column of P original  in the formula (73) are multiplied by −1. 
     (7) P Matrix for 29 or 30 Spatial Streams 
     When the quantity of spatial streams is 29 or 30, the following P matrix provided in this embodiment of this application is: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       
                         3 
                         ⁢ 
                         0 
                         × 
                         3 
                         ⁢ 
                         0 
                       
                     
                     = 
                     
                       [ 
                       
                         
                           
                             
                               P 
                               
                                 1 
                                 ⁢ 
                                 5 
                                 × 
                                 1 
                                 ⁢ 
                                 5 
                               
                             
                           
                           
                             
                               P 
                               
                                 1 
                                 ⁢ 
                                 5 
                                 × 
                                 1 
                                 ⁢ 
                                 5 
                               
                             
                           
                         
                         
                           
                             
                               P 
                               
                                 1 
                                 ⁢ 
                                 5 
                                 × 
                                 1 
                                 ⁢ 
                                 5 
                               
                             
                           
                           
                             
                               - 
                               
                                 P 
                                 
                                   1 
                                   ⁢ 
                                   5 
                                   × 
                                   1 
                                   ⁢ 
                                   5 
                                 
                               
                             
                           
                         
                       
                       ] 
                     
                   
                   ⁢ 
                   
                     
 
                   
                   ⁢ 
                   where 
                 
               
               
                 
                   ( 
                   81 
                   ) 
                 
               
             
             
               
                 
                   
                     
                       P 
                       
                         1 
                         ⁢ 
                         5 
                         × 
                         1 
                         ⁢ 
                         5 
                       
                     
                     = 
                     
                       
 
                     
                     ⁢ 
                     
                       [ 
                       
                           
                       
                       ⁢ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   0 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   1 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   2 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   3 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   4 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   5 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   6 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   7 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   8 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 9 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   9 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 10 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   10 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   11 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   11 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   11 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 11 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   11 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   11 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   12 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   12 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   12 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 12 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   12 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   12 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   13 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   13 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   13 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 13 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   13 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   13 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   14 
                                   * 
                                   1 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   14 
                                   * 
                                   5 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   14 
                                   * 
                                   9 
                                 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 14 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   14 
                                   * 
                                   13 
                                 
                               
                             
                           
                           
                             
                               - 
                               
                                 w 
                                 
                                   14 
                                   * 
                                   14 
                                 
                               
                             
                           
                         
                       
                       ⁢ 
                       
                           
                       
                       ] 
                     
                   
                   , 
                   
                     
 
                   
                   ⁢ 
                   
                     
                       and 
                       ⁢ 
                       
                           
                       
                       ⁢ 
                       w 
                     
                     = 
                     
                       exp 
                       ⁡ 
                       
                         ( 
                         
                           
                             - 
                             j 
                           
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           2 
                           ⁢ 
                           
                             π 
                             / 
                             15 
                           
                         
                         ) 
                       
                     
                   
                 
               
               
                 
                   ( 
                   82 
                   ) 
                 
               
             
           
         
       
     
     P 15×15  in the foregoing formula (82) is obtained by multiplying the second column, the sixth column, the tenth column, the fourteenth column, and the fifteenth column of P original  in the following formula (83) by −1, where P original  is expressed as follows: 
     
       
         
           
             
               
                 
                   
                     
                       P 
                       original 
                     
                     = 
                     
                       
 
                     
                     ⁢ 
                     
                       [ 
                       
                           
                       
                       ⁢ 
                       
                         
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 13 
                               
                             
                           
                           
                             
                               w 
                               
                                 0 
                                 * 
                                 14 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 13 
                               
                             
                           
                           
                             
                               w 
                               
                                 1 
                                 * 
                                 14 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 13 
                               
                             
                           
                           
                             
                               w 
                               
                                 2 
                                 * 
                                 14 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 13 
                               
                             
                           
                           
                             
                               w 
                               
                                 3 
                                 * 
                                 14 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 13 
                               
                             
                           
                           
                             
                               w 
                               
                                 4 
                                 * 
                                 14 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 13 
                               
                             
                           
                           
                             
                               w 
                               
                                 5 
                                 * 
                                 14 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 13 
                               
                             
                           
                           
                             
                               w 
                               
                                 6 
                                 * 
                                 14 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 11 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 12 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 13 
                               
                             
                           
                           
                             
                               w 
                               
                                 7 
                                 * 
                                 14 
                               
                             
                           
                         
                         
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 0 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 1 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 2 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 3 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 4 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 5 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 6 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 7 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 8 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 9 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
                                 10 
                               
                             
                           
                           
                             
                               w 
                               
                                 8 
                                 * 
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     Optionally, this embodiment of this application further provides another P 30×30  matrix when the quantity of spatial streams is 29 or 30, for example, in the foregoing formula (81) to formula (83), P 15×15  in the formula (82) may be obtained by multiplying any one column of P original  in the formula (83) by −1. Alternatively, P 15×15  in the formula (82) may be obtained by multiplying any plurality of columns of P original  in the formula (83) by −1, where the any plurality of columns herein do not include all columns. In addition to that the second column, the sixth column, and the tenth column in the formula (82) are multiplied by −1, any other plurality of columns may be multiplied by −1. For example, the second column, the third column, and the fourth column of P original  in the formula (83) are multiplied by −1. 
     The sending device  100  further includes a cyclic shift module  105 , a spatial mapping module  106 , an inverse discrete Fourier transform module  107 , a guard period module  108 , and a radio frequency transmitting module  109 . The matrix-mapped sequence obtained through mapping by using the foregoing P matrix is placed in a corresponding spatial stream for sending. 
     The receiving device  200  is configured to receive the matrix-mapped sequence sent by the sending device  100 , and perform channel estimation based on the matrix-mapped sequence. As shown in  FIG. 2 , the receiving device  200  includes a radio frequency receiving module  201  and a channel estimation module  202 . The radio frequency receiving module  201  is configured to receive the matrix-mapped sequence sent by the sending device  100 , and the channel estimation module  202  is configured to perform channel estimation based on the matrix-mapped sequence. 
     The following describes a sequence generation method in an embodiment of this application by using a procedure in  FIG. 3  as an example. 
     As shown in  FIG. 3 , the sequence generation method includes the following steps. 
     S 101 : A sending device generates a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8. 
     In step S 101 , the predefined EHT LTF sequence includes a plurality of different sequences in different modes and different bandwidths, the different bandwidths may include a 20 M bandwidth, a 40 M bandwidth, an 80 M bandwidth, a 160 M bandwidth, a 320 M bandwidth, a 160 M+160 M bandwidth, and the like, and the different modes may include a 1x mode, a 2x mode, a 4x mode, and the like. For example, the plurality of different sequences in the different modes and the different bandwidths include a sequence in the 20 M bandwidth and the 1x mode, a sequence in the 20 M bandwidth and the 2x mode, a sequence in the 20 M bandwidth and the 4x mode, a sequence in the 40 M bandwidth and the 1x mode, a sequence in the 40 M bandwidth and the 2x mode, a sequence in the 40 M bandwidth and the 4x mode, . . . , a sequence in the 320 M bandwidth and the 1x mode, a sequence in the 320 M bandwidth and the 2x mode, and a sequence in the 320 M bandwidth and the 4x mode. 
     The EHT LTF sequence is multiplied by each row of the P matrix, to obtain a plurality of matrix-mapped EHT LTF sequences, where the plurality of matrix-mapped EHT LTF sequences are spatially mapped to a plurality of different spatial streams for sending. 
     The n×n P matrix (n is greater than 8) provided in this embodiment of this application is intended to ensure that when the quantity of spatial streams increases to more than 8, a matrix-mapped sequence sent in each spatial stream needs to remain orthogonal and has a low PAPR value. 
     In this embodiment of this application, when the quantity of spatial streams is n and n is an even number, the n×n P matrix is applied. When the quantity of spatial streams is n and n is an odd number, an (n+1)×(n+1) P matrix is applied. 
     For various P matrices for different quantities of spatial streams, refer to the foregoing descriptions. Details are not described herein again. 
     S 102 : The sending device sends the PPDU. 
     S 103 : A receiving device receives the PPDU, where the PPDU includes the matrix-mapped EHT LTF sequence. The matrix-mapped EHT LTF sequence is obtained by multiplying the predefined EHT LTF sequence by the P matrix, the P matrix is an n×n matrix, and n is greater than 8. 
     S 104 : The receiving device performs channel estimation based on the matrix-mapped EHT LTF sequence. 
     In this embodiment of this application, the matrix-mapped EHT LTF sequence in the PPDU has a low PAPR value. 
     The sequence generation method in the embodiments of this application is described above. The following describes a sequence generation apparatus in an embodiment of this application. It should be understood that the sequence generation apparatus is the sending device in the foregoing method, and has any function of the sending device in the foregoing method. 
     As shown in  FIG. 4 , the sequence generation apparatus includes: a PPDU generation module  401 , configured to generate a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8; and a PPDU sending module  402 , configured to send the PPDU. 
     The sequence generation apparatus in this embodiment of this application has any function of the sending device in the foregoing method. Details are not described herein again. 
     The following briefly describes a sequence receiving apparatus in an embodiment of this application. It should be understood that the sequence receiving apparatus is the receiving device in the foregoing method, and has any function of the receiving device in the foregoing method. 
     As shown in  FIG. 5 , the sequence receiving apparatus includes: a PPDU receiving module  501 , configured to receive a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8; and a channel estimation module  502 , configured to perform channel estimation based on the matrix-mapped EHT LTF sequence. 
     The sequence receiving apparatus in this embodiment of this application has any function of the receiving device in the foregoing method. Details are not described herein again. 
     It should be understood that the P matrix applied to the EHT LTF sequence in the embodiments of this application may include, in addition to the P matrices enumerated in the foregoing embodiments, the P matrices mentioned in the processes of the foregoing embodiments, for example, P 5×5 , P 3×3 , P 6×6 , P 7×7 , P 9×9 , P 11×11 , P 13×13 , and P 15×15 , that is, the P matrices in  FIG. 2  may directly use the foregoing P 5×5 , P 3×3 , P 6×6 , P 7×7 , P 9×9 , P 11×11 , P 13×13 ,and P 15×15 . 
     The sequence generation apparatus and the sequence receiving apparatus in the embodiments of this application are described above. The following describes possible product forms of the sequence generation apparatus and the sequence receiving apparatus. It should be understood that any product having functions of the sequence generation apparatus in  FIG. 4  and any product having functions of the sequence receiving apparatus in  FIG. 5  fall within the protection scope of the embodiments of this application. It should be further understood that the following description is merely an example, and product forms of the sequence generation apparatus and the sequence receiving apparatus in the embodiments of this application are not limited thereto. 
     In a possible product form, the sequence generation apparatus and the sequence receiving apparatus described in the embodiments of this application may be implemented by using a general bus architecture. 
     The sequence generation apparatus includes a processor and a transceiver that is internally connected to and communicates with the processor. The processor is configured to generate a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8. The transceiver is configured to send the PPDU. Optionally, the sequence generation apparatus may further include a memory, where the memory is configured to store instructions executed by the processor. 
     The sequence receiving apparatus includes a processor and a transceiver that is internally connected to and communicates with the processor. The transceiver is configured to receive a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8. The processor is configured to perform channel estimation based on the matrix-mapped EHT LTF sequence. Optionally, the sequence receiving apparatus may further include a memory, where the memory is configured to store instructions executed by the processor. 
     In a possible product form, the sequence generation apparatus and the sequence receiving apparatus described in the embodiments of this application may be implemented by using a general-purpose processor. 
     The general-purpose processor for implementing the sequence generation apparatus includes a processing circuit and an output interface that is internally connected to and communicates with the processing circuit. The processing circuit is configured to generate a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8. The output interface is configured to send the PPDU. Optionally, the general-purpose processor may further include a storage medium, where the storage medium is configured to store instructions executed by the processing circuit. 
     The general-purpose processor for implementing the sequence receiving apparatus includes a processing circuit and an input interface that is internally connected to and communicates with the processing circuit. The input interface is configured to receive a PPDU, where the PPDU includes a matrix-mapped EHT LTF sequence, the matrix-mapped EHT LTF sequence is obtained by multiplying a predefined EHT LTF sequence by a P matrix, the P matrix is an n×n matrix, and n is greater than 8. The processing circuit is configured to perform channel estimation based on the matrix-mapped EHT LTF sequence. Optionally, the general-purpose processor may further include a storage medium, where the storage medium is configured to store instructions executed by the processing circuit. 
     In a possible product form, the sequence generation apparatus and the sequence receiving apparatus described in the embodiments of this application may alternatively be implemented by using the following: one or more FPGAs (Field Programmable Gate Arrays), PLDs (Programmable Logic Devices), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing various functions described in this application. 
     It should be understood that the sequence generation apparatuses in the foregoing various product forms have any function of the sending device in the foregoing method embodiment, and details are not described herein again; and the sequence receiving apparatuses in the foregoing various product forms have any function of the receiving device in the foregoing method embodiment, and details are not described herein again. 
     It should be understood that the term “and/or” in this specification describes only an association relationship for describing associated objects and represents that three relationships may exist. For example, A and/or B may represent the following three cases: only A exists, both A and B exist, and only B exists. In addition, the character “/” in this specification usually indicates an “or” relationship between the associated objects. 
     A person of ordinary skill in the art may be aware that, in combination with the examples described in the embodiments disclosed in this specification, method steps and units may be implemented by electronic hardware, computer software, or a combination thereof. To clearly describe the interchangeability between hardware and software, the foregoing has generally described steps and compositions of each embodiment according to functions. Whether the functions are performed by hardware or software depends on particular applications and design constraint conditions of the technical solutions. The person of ordinary skill in the art may use different methods to implement the described functions for each particular application, but it should not be considered that the implementation goes beyond the scope of this application. 
     It may be clearly understood by a person skilled in the art that, for the purpose of convenient and brief description, for a detailed working process of the foregoing described system, apparatus, and unit, refer to a corresponding process in the foregoing method embodiment, and details are not described herein again. 
     In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the described apparatus embodiment is merely an example. For example, division into units is merely logical function division and may be other division in actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. The indirect couplings or communication connections between the apparatuses or units may be implemented in electrical, mechanical, or other forms. 
     The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one location, or may be distributed on a plurality of network units. A part or all of the units may be selected according to actual requirements to achieve the objectives of the solutions of the embodiments in this application. 
     In addition, functional units in the embodiments of this application may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units may be integrated into one unit. The integrated unit may be implemented in a form of hardware, or may be implemented in a form of a software functional unit. 
     When the integrated unit is implemented in the form of a software function unit and is sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions in this application essentially, or the part contributing to the conventional technology, or all or a part of the technical solutions may be implemented in a form of a software product. The computer software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, a network device, or the like) to perform all or a part of the steps of the methods in the embodiments of this application. The foregoing storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (read-only memory, ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disc. 
     The foregoing descriptions are merely specific embodiments of this application, but are not intended to limit the protection scope of this application. Any modification or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.