Codebook based channel information feedback method, device and system

摘要

A codebook based channel information feedback method, device and system are provided in the present invention. The codebook based channel information feedback method includes: measuring, by a terminal in a communication system, a parameter of a downlink channel between the terminal and a base station of the communication system; selecting a plurality of precoding matrixes from a precoding codebook by using the parameter of the downlink channel, wherein a plurality of the precoding matrixes can be used by both of single-user multi-input multi-output (MIMO) transport mode and multi-user MIMO transport mode, and the precoding codebook is an aggregation of precoding matrixes; and feeding back a first information for indicating a plurality of the precoding matrixes to the base station.

主权项

1. A method for feeding back channel information based on a codebook in a communication system, comprising:
measuring, by a terminal in the communication system, parameters of a downlink channel between the terminal and a base station of the communication system; selecting at least two pre-coding matrices suitable for both single-user multiple input multiple output (SU-MIMO) transmission and multi-user multiple input multiple output (MU-MIMO) transmission from a pre-coding codebook, to facilitate dynamic switching between the SU-MIMO transmission and the MU-MIMO transmission, the pre-coding codebook being a set of pre-coding matrices; and feeding back first information indicating the at least two pre-coding matrices to the base station, wherein the selecting of the at least two pre-coding matrices comprises:
determining a selection criterion according to a number of data flows that can be simultaneously received by the terminal; andcalculating at least two matrix indicators satisfying the selection criterion by using the parameters of the downlink channel, each of the at least two matrix indicators indicating one of the at least two pre-coding matrices, the first information comprising the at least two matrix indicators.