Patent ID: 11881916
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The method according to claim 1, wherein the selecting of nm and the update coefficient αm corresponding to nm comprises:
substituting M−m+1 n in S1m-1 into a formula one by one:, α
    =
    
      
        
          
            
              
                -
                
                  real
                  ⁡
                  
                    (
                    
                      
                        r
                        ⁡
                        
                          (
                          
                            
                              H
                              m
                              +
                            
                            ,
                            n
                          
                          )
                        
                      
                      *
                      
                        
                          r
                          ⁡
                          
                            (
                            
                              
                                W
                                
                                  m
                                  -
                                  1
                                
                              
                              ,
                              n
                            
                            )
                          
                        
                        H
                      
                    
                    )
                  
                
              
              +
            
          
        
        
          
            
              
                
                  
                    
                      real
                      ⁡
                      
                        (
                        
                          
                            r
                            ⁡
                            
                              (
                              
                                
                                  H
                                  m
                                  +
                                
                                ,
                                n
                              
                              )
                            
                          
                          *
                          
                            
                              r
                              ⁡
                              
                                (
                                
                                  
                                    W
                                    
                                      m
                                      -
                                      1
                                    
                                  
                                  ,
                                  n
                                
                                )
                              
                            
                            H
                          
                        
                        )
                      
                    
                    2
                  
                  -
                  
                    
                      
                        
                        
                          r
                          ⁡
                          
                            (
                            
                              
                                H
                                m
                                +
                              
                              ,
                              n
                            
                            )
                          
                        
                        
                      
                      2
                    
                    ⁢
                    
                      (
                      
                        
                          
                            
                            
                              r
                              ⁡
                              
                                (
                                
                                  
                                    W
                                    
                                      m
                                      -
                                      1
                                    
                                  
                                  ,
                                  n
                                
                                )
                              
                            
                            
                          
                          2
                        
                        -
                      
                      )
                    
                    ⁢
                    P
                  
                
                )
              
            
          
        
      
      
        
          
          
            r
            ⁡
            
              (
              
                
                  H
                  m
                  +
                
                ,
                n
              
              )
            
          
          
        
        2
      
    
  

  
    and
    ⁢
    
      /
    
    ⁢
    or
  

  
    
      α
      =
      
        
          
            
              
                
                  -
                  
                    real
                    ⁡
                    
                      (
                      
                        
                          r
                          ⁡
                          
                            (
                            
                              
                                H
                                m
                                +
                              
                              ,
                              n
                            
                            )
                          
                        
                        *
                        
                          
                            r
                            ⁡
                            
                              (
                              
                                
                                  W
                                  
                                    m
                                    -
                                    1
                                  
                                
                                ,
                                n
                              
                              )
                            
                          
                          H
                        
                      
                      )
                    
                  
                
                -
              
            
          
          
            
              
                
                  
                    
                      
                        real
                        ⁡
                        
                          (
                          
                            
                              r
                              ⁡
                              
                                (
                                
                                  
                                    H
                                    m
                                    +
                                  
                                  ,
                                  n
                                
                                )
                              
                            
                            *
                            
                              
                                r
                                ⁡
                                
                                  (
                                  
                                    
                                      W
                                      
                                        m
                                        -
                                        1
                                      
                                    
                                    ,
                                    n
                                  
                                  )
                                
                              
                              H
                            
                          
                          )
                        
                      
                      2
                    
                    -
                    
                      
                        
                          
                          
                            r
                            ⁡
                            
                              (
                              
                                
                                  H
                                  m
                                  +
                                
                                ,
                                n
                              
                              )
                            
                          
                          
                        
                        2
                      
                      ⁢
                      
                        (
                        
                          
                            
                              
                              
                                r
                                ⁡
                                
                                  (
                                  
                                    
                                      W
                                      
                                        m
                                        -
                                        1
                                      
                                    
                                    ,
                                    n
                                  
                                  )
                                
                              
                              
                            
                            2
                          
                          -
                        
                        )
                      
                      ⁢
                      P
                    
                  
                  )
                
              
            
          
        
        
          
            
            
              r
              ⁡
              
                (
                
                  
                    H
                    m
                    +
                  
                  ,
                  n
                
                )
              
            
            
          
          2
        
      
    
    ;, and
determining a column making a smallest |α| as an antenna index nm selected in the mth iteration process, and determining the smallest |α| as αm.