Patent ID: 11863267
Assignee: INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 1:
2. The channel estimation apparatus of claim 1, wherein the pilot signal generation module comprises:
a Zadoff-Chu sequence generation module configured to receive a predetermined signal generation parameter from the transmission control module and generates a Zadoff-Chu sequence by the following (Equation 1) based on this; and
a transmission pilot signal generation module configured to generate the same number of transmission pilot signals as the number of transmission antennas connected to the phase shift network by the following (Equation 2) based on the Zadoff-Chu sequence generated in the Zadoff-Chu sequence generation module,
wherein the generated transmission pilot signals are transmitted to the phase shift network through the signal switching switch,, z
        q
       
       (
       k
       )
      
      =
      
       e
       
        
         -
         j
        
        ⁢
        π
        ⁢
        q
        ⁢
        
         
          k
          ⁡
          (
          
           k
           +
           1
          
          )
         
         
          N
          ZC
         
        
       
      
     
     ,
     
      k
      =
      0
     
     ,
     1
     ,
     2
     ,
     …
        
     ,
     
      
       N
       ZC
      
      -
      1
     
    
   
   
    
     (
     
      Equation
      ⁢
         
      1
     
     )
    
   
  
 

Zadoff-Chu sequence generated based on signal generation parameters, k: sample order of the sequence, NZC: length of the generated sequence (signal), q: a variable that determines the characteristics of the sequence using a prime number smaller than NZC), p
        n
       
       (
       k
       )
      
      =
      
       
        z
        q
       
       (
       
        
         {
         
          k
          -
          
           n
           ⁢
           
            ⌊
            
             
              N
              zc
             
             /
             
              N
              tx
             
            
            ⌋
           
          
         
         }
        
        ⁢
        mod
        ⁢
        
         N
         zc
        
       
       )
      
     
     ,
     

     
      k
      =
      0
     
     ,
     1
     ,
     
      
       …
       ⁢
          
       
        N
        zc
       
      
      -
      1
     
     ,
     
      n
      =
      0
     
     ,
     1
     ,
     
      
       …
       ⁢
          
       
        N
        tx
       
      
      -
      1
     
    
   
   
    
     (
     
      Equation
      ⁢
         
      2
     
     )
    
   
  
 

(pn(k): transmission pilot signal of the n-th transmission antenna generated based on the Zadoff-Chu sequence, └ ┘: rounding down operation, Ntx: total number of transmission antennas connected to the phase shift network).