Source: http://www.google.com/patents/US7200183?dq=4393663
Timestamp: 2015-02-28 06:29:34
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Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60']

Patent US7200183 - Construction of an interference matrix for a coded signal processing engine - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA novel method for generating an interference matrix S is disclosed. The method comprises the following steps: A) Determining the number of active channels N in a transmitter; B) Selecting the transmitter to be canceled and assigning the transmitters sequentially to the variable t; C) Selecting the channel...http://www.google.com/patents/US7200183?utm_source=gb-gplus-sharePatent US7200183 - Construction of an interference matrix for a coded signal processing engineAdvanced Patent SearchPublication numberUS7200183 B2Publication typeGrantApplication numberUS 10/294,834Publication dateApr 3, 2007Filing dateNov 15, 2002Priority dateNov 16, 2001Fee statusPaidAlso published asCN1636331A, CN100385814C, EP1540860A2, US20040052305, WO2003044969A2, WO2003044969A3Publication number10294834, 294834, US 7200183 B2, US 7200183B2, US-B2-7200183, US7200183 B2, US7200183B2InventorsEric S. Olson, John K. ThomasOriginal AssigneeTensorcomm Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (64), Non-Patent Citations (27), Referenced by (7), Classifications (15), Legal Events (8) External Links: USPTO, USPTO Assignment, EspacenetConstruction of an interference matrix for a coded signal processing engine
This application makes reference to: U.S. Provisional Patent Application No. 60/422,476, entitled �Alternate Correlator Design for Coded Signal Processing Engine,� filed Oct. 31, 2002; U.S. Provisional Patent Application No. 60/421,565, entitled �A Projection Based Receiver for WCDMA Systems,� filed Oct. 28, 2002; U.S. Provisional Patent Application No. 60/418,181, entitled �Interference Suppression with Efficient Matrix Inversion in a DS-CDMA System,� filed Oct. 15, 2002; U.S. Provisional Patent Application No. 60/418,188, entitled �Carrier Phase Recovery Circuit,� filed Oct. 15, 2002; U.S. Provisional Patent Application No. 60/418,187, entitled �Method for Channel Amplitude Estimation and Interference Vector Construction,� filed Oct. 15, 2002; U.S. Provisional Patent Application No. 60/412,550, entitled �A Controller for Interference Cancellation in Spread Spectrum Systems,� filed Sep. 23, 2002; U.S. Provisional Patent Application No. 60/354,093, entitled �A Parallel CPSE Based Receiver for Communication Signal Processing,� filed Feb. 5, 2002; U.S. patent application Ser. No. 10/247,836, entitled �Serial Cancellation Receiver Design for a Coded Signal Processing Engine,� filed Sep. 20, 2002; U.S. Provisional Patent Application No. 60/348,106, entitled �Serial Receiver Design for a Coded Signal Processing Engine,� filed Jan. 14, 2002; U.S. patent application Ser. No. 10/178,541, entitled �Method and Apparatus to Compute the Geolocation of a Communication Device Using Orthogonal Projection Methods,� filed Jun. 25, 2002; U.S. Provisional Patent Application No. 60/333,143, entitled �Method and Apparatus to Compute the Geolocation of a Communication Device Using Orthogonal Projection Methods,� filed Nov. 27, 2001; U.S. Provisional Patent Application No. 60/331,480, entitled �Construction of an Interference Matrix for a Coded Signal Processing Engine,� filed Nov. 16, 2001; U.S. patent application Ser. No. 09/988,219, entitled �A Method and Apparatus for Implementing Projections in Signal Processing Applications,� filed Nov. 19, 2001; U.S. Provisional Patent Application No. 60/325,215, entitled �An Apparatus for Implementing Projections in Signal Processing Applications,� filed Sep. 28, 2001; U.S. patent application Ser. No. 09/988,218, entitled �Interference Cancellation in a Signal,� filed Nov. 19, 2001; U.S. Provisional Patent Application No. 60/326,199, entitled �Coded Signal Processing Engine (CSPE) Architecture,� filed Oct. 2, 2001; U.S. Pat. No. 6,380,879, entitled �Method and Apparatus for Acquiring Wide-Band Pseudorandom Noise Encoded Waveforms,� issued on Apr. 30, 2002; U.S. Pat. No. 6,362,760, entitled �Method and Apparatus for Acquiring Wide-Band Pseudorandom Noise Encoded Waveforms,� issued Mar. 26, 2002; U.S. Pat. No. 6,252,535, entitled �Method and Apparatus for Acquiring Wide-Band Pseudorandom Noise Encoded Waveforms,� issued Jun. 26, 2001; U.S. Provisional Patent Application No. 60/251,432, entitled �Architecture for Acquiring, Tracking and Demodulating Pseudorandom Coded Signals in the Presence of Interference,� filed Dec. 4, 2000; U.S. patent application Ser. No. 09/612,602, entitled �Rake Receiver for Spread Spectrum Signal Demodulation,� filed Jul. 7, 2000, and issued as U.S. Pat. No. 6,430,216 on Aug. 6, 2002; and U.S. patent application Ser. No. 09/137,183, entitled �Method and Apparatus for Acquiring Wide-Band Pseudorandom Noise Encoded Waveforms,� filed Aug. 20, 1998. The entire disclosure and contents of these applications are hereby incorporated by reference.
Where the subscript p denotes that relative signal amplitude is used in constructing the interference signals that are summed over channel index k. For the following discussion, vector sp is defined as the interference vector scaled by the amplitude, specifically sp=sθ where θ is the amplitude including sign. For example, if the channels to be canceled are 1�3, 5, 7 then the index k ranges from 1�3, 5, 7. Moreover, the composite interference vector may be represented as sp 1 1-3,5,7 0. Thus, the composite interference vector effectively contains the information of several interference signals in a compact form.
The subscript p denotes that relative signal amplitude is used in constructing the composite interference vector by summing over the channel index and the transmitter index. For the following discussion, vector sp is defined as an interference vector scaled by its relative amplitude, specifically sp=sθ where θ is the relative amplitude. For example, if the index k ranges over channels 1�3 for transmitter one and channels 3�5 and 7 for transmitter two, the composite vector may be represented as sp(1 1-3)0(2 3-5,7)0=sp 1 1-3 0+sp 2 3-5,7 0. The composite vector effectively contains the information of several interference signals from a plurality of transmitters and channels.
where subscript p denotes that relative signal amplitude is used in constructing the interference vector by summing over channel index (k) and multipath index (j) and including the corresponding interference vectors to be cancelled. Note that the interfering vectors will only be included for the j and k indices that may have been dynamically selected for inclusion. For the following discussion, vector sp is defined as the interference vector scaled by the amplitude, specifically sp=sθ. For example, if the index k ranges from channels 1�3 for LOS signal and channels 3�5 and 7 for first multipath signal, the composite vector may be represented as sp(1 1-3)0(1 3-5,7)1=sp 1 1-3 0+sp 1 3-5,7 1. The composite vector effectively contains the information of several interference signals from one transmitter's LOS and multipath signals for multiple channels.
where the subscript p denotes that relative signal amplitude is used in constructing the composite interference vector by summing over channel index (k), multipath index (m) and transmitter index (j) and including the corresponding interference vectors to be cancelled. Note that interference vectors will only be included for the j, k and m indices selected for inclusion. For the following discussion, vector sp is defined as the interference vector scaled by its relative amplitude, specifically sp=sθ where θ is the relative amplitude. For example, if index k ranges from channels 1�3 for LOS signal and first multipath for transmitter one; channels 2�10 for multipath three from transmitter one; and channels 3�5 and 7 for multipath signal one for transmitter two, the composite vector may be represented as sp(1 1-3)0,1(1 2-10)3(2 3-5,7)1=sp 1 1-3 0,1+sp 1 2-10 3+sp 2 3-5,7 1. The composite vector effectively contains the information of several interference signals from a plurality of transmitter's LOS and multipath signals for a plurality of channels.
FIG. 5 provides a generalized CSPE receiver architecture 500. The generation of interference matrix S is conducted in CSPE module 520. Transmitted signal 501 is received by antenna 502 and frequency down-converted and sampled in ADC box 504. Control/logic module 506, depicted as two modules to simplify the connections and for clarity, provides appropriate information to the assignment of fingers 508, 510 and 512 and data flow to and from fingers 508, 510 and 512. For a detailed discussion of control/logic module 506, the reader is referred to U.S. Provisional Patent Application No. 60/412,550, entitled �A Controller for Interference Cancellation in Spread Spectrum Systems,� filed Sep. 23, 2002, and hereby incorporated in its entirety by reference. Searcher module 514 continually searches for signals to acquire. Fingers 508, 510, 512 are preferably identical, arbitrary fingers in the receiver. It should be appreciated that these fingers 508, 510, and 512 are illustrative and only the interactive elements in each finger are illustrated. Preferably, each finger has the structure that is illustrated in exemplary finger 510. A finger processor 516 is what is typically contained in finger 510 of a baseline receiver. It may perform acquisition depending on the receiver architecture and tracks the assigned signal of interest. Power estimation module 518 does power estimation that is used by control/logic module 506 to manage finger assignment, Coded Signal Processing Engine (CSPE) 520 performs the projection operation to remove interference and demodulator 522 demodulates the signal of interest. For a detailed discussion of power estimation module 518, the reader is referred to U.S. Provisional Patent Application No. 60/418,187, entitled �Method for Channel Amplitude Estimation and Interference Vector Construction,� filed Oct. 15, 2002, which is hereby incorporated by reference in its entirety. The projection operator or the data that has been operated on by the projection operator is sent to control logic module 506 and may be used by subsequent fingers to perform acquisition and/or tracking of signals with the benefit of interference cancellation. As discussed above, both control/logic modules 506 are preferably the same module and are illustrated as separate items for clarity. For a detailed discussion of receiver architectures, the reader is referred to U.S. Provisional Patent Application No. 60/354,093, entitled �A Parallel CPSE Based Receiver for Communication Signal Processing,� filed Feb. 5, 2002; U.S. patent application Ser. No. 10/247,836, entitled �Serial Cancellation Receiver Design for a Coded Signal Processing Engine,� filed Sep. 20, 2002; and U.S. Provisional Patent Application No. 60/348,106, entitled �Serial Receiver Design for a Coded Signal Processing Engine,� filed Jan. 14, 2002; which are hereby incorporated in their entirety by reference hereto.
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