Search International and National Patent Collections

1. (WO2017152785) CSI FEEDBACK METHOD, PRECODING METHOD, AND APPARATUS

Pub. No.:    WO/2017/152785    International Application No.:    PCT/CN2017/074810
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Feb 25 00:59:59 CET 2017
IPC: H04B 7/04
H04B 7/06
Applicants: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
电信科学技术研究院
Inventors: CHEN, Wenhong
陈文洪
GAO, Qiubin
高秋彬
LI, Hui
李辉
CHEN, Runhua
陈润华
RAKESH, Tamrakar
拉盖施
Title: CSI FEEDBACK METHOD, PRECODING METHOD, AND APPARATUS
Abstract:
Disclosed are a channel state information (CSI) feedback method, a precoding method, and an apparatus. In the present invention, a terminal obtains, according to the number of downlink transport layers, a first precoding matrix set that is located on a first subband and that is corresponding to the number of the downlink transport layers, the first precoding matrix set comprising one or more precoding matrices, and a physical resource in the first subband being corresponding to a precoding matrix in the first precoding matrix set; the terminal determines a channel quality indicator (CQI) on a second subband according to downlink channel information and the first precoding matrix set on the first subband; and the terminal feeds back the CSI, the CSI comprising one or more of the following information: an RI used for indicating the number of the downlink transport layers, a PMI used for indicating the first precoding matrix set on the first subband and the CQI on the second subband. The technical solution disclosed in the resent invention can reduce signaling overheads of feeding back CSI by a terminal.