WIRELESS TRANSMISSION DEVICE, WIRELESS RECEPTION DEVICE, WIRELESS COMMUNICATION DEVICE, AND INTEGRATED CIRCUIT

摘要

The purpose of the present invention is to reduce the complexity of a mobile-station device, and constrain the amount of overhead involved in notifications from said mobile-station device, in codebook-based closed-loop MIMO. A wireless transmission device, provided with a plurality of transmission antennas, performs precoding on data signals addressed to a plurality of reception devices and spatially multiplexes and transmits the precoded signals. Said wireless transmission device shares a codebook, which contains a plurality of mutually associated linear filters, with each of the aforementioned reception devices. For each of said reception devices, the wireless transmission device performs precoding on a data signal addressed to said reception device on the basis of a first linear filter which said reception device had extracted from the codebook on the basis of the aforementioned associations and notified the wireless transmission device of.