RADIO RELAY DEVICE, RADIO TRANSMISSION DEVICE, RADIO RECEPTION DEVICE, RADIO COMMUNICATION SYSTEM, CONTROL PROGRAM, AND INTEGRATED CIRCUIT

摘要

PROBLEM TO BE SOLVED: To make it possible to transmit simultaneously by use of spacial multiplexing and improve transmission efficiency in the case where relay transmission of a transmission signal is performed via different relay station devices.

SOLUTION: Relay station devices 110-1 and 110-2 relay a plurality of data sequences by multi-user MIMO transmission. The relay station devices generate a first CSI indicating an estimated propagation path state between the own relay station devices 110-1 and 110-2, and a relay source 100, and send it to the relay source 100. The relay source 100 performs pre-coding on the basis of the first CSI and simultaneously transmits data sequences to the plurality of relay station devices 110-1 and 110-2. The relay station devices, after propagation path compensation, perform pre-coding to received data sequences among the transmitted data sequences on the basis of a second CSI indicating an estimated propagation path state between the own relay station devices 110-1 and 110-2 and each of a plurality of relay destinations 120-1 to 120-8, and simultaneously transmit the data sequences to the plurality of relay destinations 120-1 to 120-8.

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