Patent ID: 11881903
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. The method of claim 9, wherein performing blind estimation comprises determining SNR according to the following formula:, ρ
  =
  
   
    
     
      2
      ⁢
      
       M
       2
       2
      
     
     -
     
      M
      4
     
    
   
   
    
     M
     2
    
    -
    
     
      
       2
       ⁢
       
        M
        2
        2
       
      
      -
      
       M
       4
      
     
    
   
  
 

where ρ is the SNR,, M
    2
   
   =
   
    
     1
     
      N
      fft
     
    
    ⁢
    
     
      ∑
       
     
     
      j
      =
      0
     
     
      
       N
       fft
      
      -
      1
     
    
    ⁢
    
     
      
       ❘
       "\[LeftBracketingBar]"
      
      
       
        
         S
         ˜
        
        n
       
       (
       j
       )
      
      
       ❘
       "\[RightBracketingBar]"
      
     
     2
    
   
  
  ,
  
   
    M
    4
   
   =
   
    
     1
     
      N
      fft
     
    
    ⁢
    
     
      ∑
       
     
     
      j
      =
      0
     
     
      
       N
       fft
      
      -
      1
     
    
    ⁢
    
     
      
       ❘
       "\[LeftBracketingBar]"
      
      
       
        
         S
         ~
        
        n
       
       (
       j
       )
      
      
       ❘
       "\[RightBracketingBar]"
      
     
     4
    
   
  
  ,
 

 {tilde over (S)}n(j) is the jth element of {tilde over (S)}n, {tilde over (S)}n is an estimated value of the symbol of the fountain coded sequence at the nth antenna branch, and Nfft is a size of a Fast Fourier Transform matrix used to generate the symbol.