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1. (WO2017152747) CSI FEEDBACK METHOD, PRECODING METHOD, AND APPARATUS

Pub. No.:    WO/2017/152747    International Application No.:    PCT/CN2017/074170
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Tue Feb 21 00:59:59 CET 2017
IPC: H04L 1/06
Applicants: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
电信科学技术研究院
Inventors: CHEN, Wenhong
陈文洪
CHEN, Runhua
陈润华
GAO, Qiubin
高秋彬
RAKESH, Tamrakar
拉盖施
LI, Hui
李辉
Title: CSI FEEDBACK METHOD, PRECODING METHOD, AND APPARATUS
Abstract:
Disclosed are a CSI feedback method, a precoding method, and an apparatus. In the present invention, after a terminal determines first precoding matrices on a first subband, the terminal obtains second precoding matrices corresponding to physical resources in the first subband according to the first precoding matrices and a column vector arrangement mode corresponding to the first precoding matrices; and then, the terminal determines CSI on a second subband according to the second precoding matrices. In the embodiment, precoding matrices are expanded according to a column vector arrangement mode, so as to obtain second precoding matrices corresponding to different physical resources; accordingly based on the second precoding matrices, CSI is measured by using the corresponding second precoding matrices on different physical resources. In the embodiment, precoding matrices are expanded according to a column vector arrangement mode, so that precoding can be performed on each data flow in transmission by using different column vectors, thereby improving the robustness of a transmission solution, and obtaining a stabler precoding gain.