Patent ID: 11943022
Assignee: INTEL CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The apparatus of claim 16, wherein:
a signal received from the base station at Nr antennas is given in vector form as:

y(t)=hx(t)+n(t)

where y(t) is the signal received, n(t) is noise, and, h
    =
    
      
        ∑
        m
      
      ⁢
      
        
          g
          m
        
        ⁢
        
          a
          ⁡
          
            (
            
              θ
              m
            
            )
          
        
      
    
  

  
    
      a
      ⁡
      
        (
        θ
        )
      
    
    =
    
      
        [
        
          1
          ⁢
          
            
          
          ⁢
          
            e
            
              j
              ⁢
              
                
              
              ⁢
              π
              ⁢
              
                
              
              ⁢
              
                sin
                ⁡
                
                  (
                  θ
                  )
                
              
            
          
          ⁢
          
            
          
          ⁢
          …
          ⁢
          
            
          
          ⁢
          
            e
            
              
                j
                ⁡
                
                  (
                  
                    K
                    -
                    1
                  
                  )
                
              
              ⁢
              π
              ⁢
              
                
              
              ⁢
              sin
              ⁢
              
                
              
              ⁢
              
                (
                θ
                )
              
            
          
        
        ]
      
      T
    
  

where gm is a complex channel gain,, θ
    =
    
      
        max
        θ
      
      ⁢
      
        
          
          
            
              
                a
                H
              
              ⁡
              
                (
                θ
                )
              
            
            ⁢
            h
          
          
        
        2
      
    
  

  
    W
    =
    
      [
      
        
          w
          -
        
        ⁢
        
          
        
        ⁢
        
          a
          ⁡
          
            (
            θ
            )
          
        
        ⁢
        
          
        
        ⁢
        
          w
          +
        
      
      ]
    
  

  
    
      
        w
        -
      
      =
      
        a
        ⁡
        
          (
          
            θ
            -
            δ
          
          )
        
      
    
    ,
    
      
        w
        +
      
      =
      
        a
        ⁡
        
          (
          
            θ
            +
            δ
          
          ), where W is a weight matrix and w+ and w− weight vectors,
a digital signal at an output of the main and adjacent RE chains is given by:

r(t)=WHy(t)

θ=θ+μf(r)

f(r)=sign(|r3(t)|−|r1(t)|)

where f(r) is an AoA change detector that is able to detect a direction of a change in AoA and μ, is an update factor.