COMMUNICATION CONTROL METHOD, MOBILE STATION DEVICE AND BASE STATION DEVICE

摘要

A feedback information amount for specifying a precoding weight is lightened. Disclosed is a mobile station device (10) characterized in that a feedback control signal generating unit (108), composed of a plurality of bits representing RI and a plurality of bits representing PMI, generates a control signal that specifies a precoding weight from a bit space allocated with bits that represent the same RI in a plurality of ranks higher than a predetermined rank, with a bit that represents RI and a bit that represents PMI, and sends this control signal to an uplink via an antenna (RX #1 - #N).