Patent ID: 11888567
Assignee: LG ELECTRONICS INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving configuration information related to reporting of channel state information (CSI);
receiving a channel state information-reference signal (CSI-RS);
computing the CSI based on the CSI-RS; and
reporting the CSI,
wherein the CSI includes first information for selecting a plurality of antenna ports related to the CSI-RS,
wherein K antenna ports are selected from P antenna ports related to the CSI-RS, based on the first information, and
wherein, for each polarization related to the plurality of antenna ports, K/2 antenna ports are selected from P/2 antenna ports related to the CSI-RS based on a combination of P/2 and K/2, and
wherein a bitwidth for the first information is, ⌈
   
    
     log
     2
    
    (
    
     
      
       
        P
        /
        2
       
      
     
     
      
       
        K
        /
        2
       
      
     
    
    )
   
   ⌉
  
  ., ┌ ┐ is a ceiling function and, (
  
   
    
     x
    
   
   
    
     y
    
   
  
  ), is a combinatorial coefficient C(x, y).