Patent ID: 11967829
Assignee: UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The channel estimating apparatus according to claim 5, wherein the reflecting surface channel updating unit approximates and acquires the covariance vector RK for Gaussian noise vector which calculates the approximated covariance matrix {tilde over (R)}k by Equation 4 and Equation 5,

 
  
   
    
     
      
       [
       
        
         R
         k
        
        (
        T
        )
       
       ]
      
      
       p
       ,
       q
      
     
     =
     
      {
      
       
        
         
          
           
            
             σ
             k
             2
            
            +
            
             
              (
              
               
                β
                k
                
                 2
                 ⁢
                 
                  (
                  
                   p
                   -
                   L
                  
                  )
                 
                
               
               -
               1
              
              )
             
             ⁢
             
              
               w
               H
              
              (
              
               p
               ′
              
              )
             
             ⁢
             
              GG
              H
             
             ⁢
             
              w
              ⁡
              (
              
               p
               ′
              
              )
             
             ⁢
                
             p
            
           
           =
           q
          
         
        
        
         
          
           
            
             (
             
              
               β
               k
               
                p
                +
                q
                -
                
                 2
                 ⁢
                 L
                
               
              
              -
              
               β
               k
               
                -
                
                 
                  ❘
                  "\[LeftBracketingBar]"
                 
                 
                  q
                  -
                  p
                 
                 
                  ❘
                  "\[RightBracketingBar]"
                 
                
               
              
             
             )
            
            ⁢
            
             
              w
              H
             
             (
             
              p
              ′
             
             )
            
            ⁢
            G
            ⁢
            
             
              θ
              H
             
             (
             
              p
              ′
             
             )
            
            ⁢
            
             θ
             ⁡
             (
             
              q
              ′
             
             )
            
            ⁢
            
             G
             H
            
            ⁢
            
             w
             ⁡
             (
             
              q
              ′
             
             )
            
            ⁢
               
            p
           
           ≠
           q
          
         
        
       
       ,
      
     
    
   
   
    
     [
     
      Equation
      ⁢
         
      4
     
     ]
    
   
  
 

p′=T−L+p,q′=T−L+q 

where p and q are a row and a column of the covariance matrix RK, respectively;, [
       
        
         R
         ~
        
        k
       
       ]
      
      
       p
       ,
       q
      
     
     =
     
      {
      
       
        
         
          
           
            
             
              [
              
               R
               k
              
              ]
             
             
              p
              ,
              q
             
            
            ⁢
               
            p
           
           =
           q
          
         
        
        
         
          
           
            0
            ⁢
               
            p
           
           ≠
           q
          
         
        
       
       .
      
     
    
   
   
    
     [
     
      Equation
      ⁢
         
      5
     
     ]