Patent ID: 11888558
Assignee: LG ELECTRONICS INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. The method of claim 1, wherein the codebook further includes a second codebook for a rank 2 using the 4 antenna ports, and
wherein the second codebook is based on the following table., TPMI
W

index
(ordered from left to right in increasing order of TPMI index)

0-3

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          0
        
        
          0
        
      
      
        
          0
        
        
          0
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          0
        
        
          0
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          0
        
      
      
        
          0
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          0
        
        
          0
        
      
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          0
        
        
          0
        
      
    
    ]
  

 

4-7

  
    1
    2
  
  ⁡
  
    [
    
      
        
          0
        
        
          0
        
      
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          0
        
        
          0
        
      
      
        
          0
        
        
          0
        
      
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          
            -
            j
          
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          j
        
      
    
    ]
  

 

 8-11

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          
            -
            j
          
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          
            -
            j
          
        
        
          0
        
      
      
        
          0
        
        
          
            -
            1
          
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          
            -
            1
          
        
        
          0
        
      
      
        
          0
        
        
          
            -
            j
          
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          
            -
            1
          
        
        
          0
        
      
      
        
          0
        
        
          j
        
      
    
    ]
  

 

12-15

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          j
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
    
    ]
  

  
    1
    2
  
  ⁡
  
    [
    
      
        
          1
        
        
          0
        
      
      
        
          0
        
        
          1
        
      
      
        
          j
        
        
          0
        
      
      
        
          0
        
        
          
            -
            1
          
        
      
    
    ]
  

  
    1
    
      2
      ⁢
      
        2
      
    
  
  ⁡
  
    [
    
      
        
          1
        
        
          1
        
      
      
        
          1
        
        
          1
        
      
      
        
          1
        
        
          
            -
            1
          
        
      
      
        
          1
        
        
          
            -
            1
          
        
      
    
    ]
  

  
    1
    
      2
      ⁢
      
        2
      
    
  
  ⁡
  
    [
    
      
        
          1
        
        
          1
        
      
      
        
          1
        
        
          1
        
      
      
        
          j
        
        
          
            -
            j
          
        
      
      
        
          j
        
        
          
            -
            j
          
        
      
    
    ]
  

 

16-19

  
    1
    
      2
      ⁢
      
        2
      
    
  
  ⁡
  
    [
    
      
        
          1
        
        
          1
        
      
      
        
          j
        
        
          j
        
      
      
        
          1
        
        
          
            -
            1
          
        
      
      
        
          j
        
        
          
            -
            j
          
        
      
    
    ]
  

  
    1
    
      2
      ⁢
      
        2
      
    
  
  ⁡
  
    [
    
      
        
          1
        
        
          1
        
      
      
        
          j
        
        
          j
        
      
      
        
          j
        
        
          
            -
            j
          
        
      
      
        
          
            -
            1
          
        
        
          1
        
      
    
    ]
  

  
    1
    
      2
      ⁢
      
        2
      
    
  
  ⁡
  
    [
    
      
        
          1
        
        
          1
        
      
      
        
          
            -
            1
          
        
        
          
            -
            1
          
        
      
      
        
          1
        
        
          
            -
            1
          
        
      
      
        
          
            -
            1
          
        
        
          1
        
      
    
    ]
  

  
    1
    
      2
      ⁢
      
        2
      
    
  
  ⁡
  
    [
    
      
        
          1
        
        
          1
        
      
      
        
          
            -
            1
          
        
        
          
            -
            1
          
        
      
      
        
          j
        
        
          
            -
            j
          
        
      
      
        
          
            -
            j
          
        
        
          j
        
      
    
    ]
  

 

20-21

  
    1
    
      2
      ⁢
      
        2
      
    
  
  ⁡
  
    [
    
      
        
          1
        
        
          1
        
      
      
        
          
            -
            j
          
        
        
          
            -
            j
          
        
      
      
        
          1
        
        
          
            -
            1
          
        
      
      
        
          
            -
            j
          
        
        
          j
        
      
    
    ]
  

  
    1
    
      2
      ⁢
      
        2
      
    
  
  ⁡
  
    [
    
      
        
          1
        
        
          1
        
      
      
        
          
            -
            j
          
        
        
          
            -
            j
          
        
      
      
        
          j
        
        
          
            -
            j
          
        
      
      
        
          1
        
        
          
            -
            1
          
        
      
    
    ]
  

—
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