Multi-user MIMO system, base station, user equipment, and CQI feedback method

摘要

The present invention relates to a MU-MIMO system and a Node B, user equipment and CQI (Channel Quality Indicator) feedback method of the system. The MU-MIMO system, comprising a Node B and a UE which communicate with each other through a wireless network, wherein the UE feeds back a CQI corresponding to a previously scheduled first Rank value to the Node B; and the Node B acquires CQIs corresponding to all Rank values according to the CQI corresponding to the first Rank value fed back from the UE and performs scheduling according to the CQIs corresponding to all the Rank values from all the UEs. According to the present invention, the system throughput performance is improved effectively without the increase in uplink signaling overhead.