APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING IN MULTI-USER MULTI-ANTENNA COMMUNICATION SYSTEMS

摘要

A transceiving device in a multi-user multi-antenna communication system and a method are provided to use limited quantization feedback without using a mutual channel relation, thereby reducing an overhead in case of feeding back as lowering calculation complexity of a transmitter filter. A user terminal(310) performs channel estimation by using a pilot of a preamble in a downlink frame sent from a base station(300)(a). The terminal calculates quantized CSI(Channel State Information) and CQI(Channel Quality Information) by using the estimated channel information(b), and sends the calculated information to the base station(c). The base station calculates a transmitter filter by using the received information(d), and sends an optimized transmitter filter to the terminal(e). The terminal estimates a channel by using a downlink sounding pilot, and calculates a receiver filter by using the estimated value(f).