Patent ID: 11956039
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The method of claim 3, wherein the DFT based matrix is:, W
   =
   
    
     1
     
      K
     
    
    [
    
     
      
       1
      
      
       1
      
      
       1
      
      
       1
      
      
       …
      
      
       1
      
     
     
      
       1
      
      
       w
      
      
       
        w
        2
       
      
      
       
        w
        3
       
      
      
       …
      
      
       
        w
        
         K
         -
         1
        
       
      
     
     
      
       1
      
      
       
        w
        2
       
      
      
       
        w
        4
       
      
      
       
        w
        6
       
      
      
       …
      
      
       
        w
        
         2
         ⁢
         
          (
          
           K
           -
           1
          
          )
         
        
       
      
     
     
      
       1
      
      
       
        w
        3
       
      
      
       
        w
        6
       
      
      
       
        w
        9
       
      
      
       …
      
      
       
        w
        
         3
         ⁢
         
          (
          
           K
           -
           1
          
          )
         
        
       
      
     
     
      
       ⋮
      
      
       ⋮
      
      
       ⋮
      
      
       ⋮
      
      
       ⋱
      
      
       ⋮
      
     
     
      
       1
      
      
       
        w
        
         K
         -
         1
        
       
      
      
       
        w
        
         2
         ⁢
         
          (
          
           K
           -
           1
          
          )
         
        
       
      
      
       
        w
        
         3
         ⁢
         
          (
          
           K
           -
           1
          
          )
         
        
       
      
      
       …
      
      
       
        w
        
         
          (
          
           K
           -
           1
          
          )
         
         ⁢
         
          (
          
           K
           -
           1
          
          )
         
        
       
      
     
    
    ]
   
  
  ,, where w=e−2πi/K, K is a number of beam vectors in the first set and i is an imaginary unit, and each column of W is one beam vector of the first set.