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1. (WO2014194842) TRANSMISSION METHOD AND DEVICE FOR CHANNEL STATE INFORMATION BASED ON CODEBOOK

Pub. No.:    WO/2014/194842    International Application No.:    PCT/CN2014/079283
Publication Date: Fri Dec 12 00:59:59 CET 2014 International Filing Date: Fri Jun 06 01:59:59 CEST 2014
IPC: H04B 7/02
Applicants: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
电信科学技术研究院
Inventors: ZHANG, Ranran
张然然
SU, Xin
苏昕
TAMRAKAR, Rakesh
拉盖施
Title: TRANSMISSION METHOD AND DEVICE FOR CHANNEL STATE INFORMATION BASED ON CODEBOOK
Abstract:
Disclosed are a transmission method and device for channel state information based on a codebook, which is used for solving the problem that there is no specific solution at present for feeding back the channel state information based on an enhanced codebook at present for the case of a four-antenna port. The method comprises: after receiving indication information sent by a base station, a terminal determining an RI and a used pre-coding matrix from a compressed four-antenna codebook; in accordance with a set united encoding rule, determining the RI and a united encoding value corresponding to a first PMI which is used for indicating a first codebook index of the pre-coding matrix; and in accordance with a feedback mode indicated in the indication information, at a set feedback moment, sending the determined united encoding value to the base station, and at the other set feedback moment, sending a second PMI, which is used for indicating a second codebook index of the pre-coding matrix, and a CQI to the base station, thereby realizing the feedback of the channel state information based on the enhanced codebook in the case of a four-antenna port.