Patent ID: 9705577
Date: 2017-07-11
CPC Classifications: H04B

Claim:
1. A method for selecting a pre-coding matrix indication (PMI), the method comprising: sending, by a base station, indication information to a terminal, wherein the indication information is used to instruct the terminal to send uplink data without weighting the uplink data or after weighting the uplink data by using an identity matrix; receiving, by the base station, the uplink data sent by the terminal; selecting, by the base station, a first PMI from a PMI set of the base station according to the uplink data; and sending the first PMI to the terminal, wherein the indication information is a second PMI, wherein the second PMI is a PMI corresponding to an identity matrix codebook in the PMI set of the base station, and wherein the uplink data is uplink data that is weighted according to an identity matrix codebook corresponding to the second PMI and sent by the terminal.