Patent ID: 8605805

Claim:
A receiver that receives a signal from a transmitter via a plurality of communication channels, informs the transmitter of channel state information which indicates a state of the communication channels, and comprises: a channel correlation value computation unit that computes a correlation value assigned to each channel state information combination between channel state information items corresponding to the communication channels; a conversion input data generation unit that determines a channel state information combination, which has been determined to have a relatively large correlation based on the correlation value, to be conversion input data; a time-to-frequency region conversion unit that converts the region of the conversion input data from a time region to a frequency region; an information compressing unit that compresses information of a frequency component included in the conversion input data obtained by the time-to-frequency region conversion unit; and a transmitting unit that sends the transmitter, information-compressed data obtained by the information compressing unit and information used for isolating the channel state information items included in the conversion input data.