Channel state information feedback method and user equipment

Abstract

The invention provides a channel state information feedback method and user equipment (UE), and the method comprises the following steps: leading the UE to determine a first class pre-coding matrix index or the first class pre-coding matrix index and a second class matrix index according to indication information, wherein the first class pre-coding matrix index is used for indicating an index of a first class pre-coding matrix in a configured set of first class pre-coding codes, and the second class matrix index is used for indicating the index of a second class matrix in the configured set of second class codes; leading the UE to calculate channel quality information (CQI) according to the determined first class pre-coding matrix index; and leading the UE to send the calculated CQI to the base station or leading the calculated CQI and the determined first class pre-coding matrix index and/or the second class matrix index to the base station, wherein the first class pre-coding matrix is used for mapping channel information of a broad band and/or a long-term channel, and the second class matrix is used for mapping the channel information of a sub-band and/or a short-term channel.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a channel state information feedback method and a terminal. Background technique [0002] The Long Term Evolution Advanced (LTE-A) system, as an evolution standard of the Long term evolution (LTE), supports a larger system bandwidth (up to 100MHz) and is backward compatible with LTE existing standards. In order to improve the coverage and throughput of the cell edge, LTE-A proposes a cooperative multiple input multiple output (Multiple Input Multiple Output, referred to as MIMO) technology based on the existing LTE system, also known as coordinated multi-point Transmission (COMP) technology, which can improve the spectrum utilization rate of an evolved International Mobile Telecommunications-Advance (IMT-Advance) system and alleviate the shortage of spectrum resources. [0003] In wireless communication, if multiple antennas are used at the sending end (suc...

AI Technical Summary

Problems solved by technology

[0052] The main purpose of the present invention is to provide a channel state information feedback method and terminal to solve the problem that the original feedback method used in the related ar

Images