DOWNLINK CHANNEL ESTIMATION METHOD AND APPARATUS BASED ON SOUNDING REFERENCE SIGNAL AND COMMUNICATION SYSTEM

摘要

A method and apparatus for downlink channel estimation based on sounding reference signals, and a communication system. The method includes: a base station receiving a sounding reference signal sent by user equipment, the sounding reference signal being used for downlink channel estimation and supporting high dimensional MU-MIMO; Performing uplink channel estimation according to the sounding reference signal; And acquiring downlink channel information according to the uplink channel information obtained in the uplink channel estimation. By embodiments of the present invention, downlink reference signal overheads and feedback overheads can be significantly reduced, the gain that can be brought by large antennas is obtained, and the system capacity can be further improved. .