FEEDBACK SCHEDULING TO REDUCE FEEDBACK RATES IN MIMO SYSTEMS

摘要

In a closed-loop wireless communication system (200), a codebook-based feedback (201.1) control mechanism is provided where feedback from each of a plurality of receivers (304.1 - 304.3) is scheduled to control the feedback so that the receiving devices do not needlessly feed back precoding information to the transmitting device (302). The feedback may be controlled by establishing and distributing a schedule (310) to control when each receiver feeds back precoding information (201.1), or by establishing and distributing a metric-based feedback threshold (704, 706) that must be satisfied before feedback is permitted.