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Method and apparatus for transmitting channel state information in wireless communication system

專利號(hào)
US10868597B2
公開(kāi)日期
2020-12-15
申請(qǐng)人
LG ELECTRONICS INC.（KR Seoul）
發(fā)明人
Hyungtae Kim; Hanjun Park
IPC分類
H04B7/0456; H04B17/382; H04B7/06; H04L5/00; H04L1/00; H04B7/0417; H04W72/04; H04W72/06; H04W88/02
技術(shù)領(lǐng)域
cqi,codebook,w1,pmi,ri,ue,w2,in,csi,channel
地域： Seoul

摘要

A method for receiving channel state information (CSI) by a base station, includes transmitting configuration information indicating whether to use a 4 antenna ports codebook, wherein a first codebook index for a first precoding matrix indicator (PMI) and a second codebook index for a second PMI for a specific CSI report mode with 4 antenna ports are determined when the UE is configured to use the 4 antenna ports codebook; and receiving the CSI indicating the first codebook index and the second codebook index, wherein a value of the first codebook index is determined as follows: when a rank indicator (RI) is 1, the value of the first codebook index is determined based on a value of the first PMI multiplied by 4, and when the RI is 2, the value of the first codebook index is determined based on the value of the first PMI multiplied by 4.

說(shuō)明書

According to the second embodiment of the present invention, a subsampling method of W1/W2 in type 2c report may be applied as shown in Table 7 below. For example, only one of {0,1,2,3,4,5,6,7} may be reported as W1 index in rank 1 and only one of {0,2} may be reported as W2 index. W1 codebook for ranks 3 and 4 is an identity matrix, and thus separate signaling for W1 is not required.

TABLE 7 PMI for W1 PMI for W2 total RI #bits values #bits values #bits 1 3 {0, 1, 2, 3, 4, 5, 6, 7} 1 {0, 2} 4 2 3

權(quán)利要求

1
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