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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(shū)

e 4 , e 2 ) } [ Equation ? ? 20 ]

Here, en is a 4-element selection vector with all zeros except for the nth element with 1.

An index of W1 is defined as i1, and i1 is the same as index n of W1 in the aforementioned equation of 4Tx codebook.

In addition, an index of W2 is defined as shown in the following table.

TABLE 4 Index of W2 W2 for rank 1 W2 for rank 2 ?0 1 2

權(quán)利要求

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