| 摘要 |
<p>In a case where transmission signals are relayed and transmitted via different relay station devices, the present invention enables simultaneous transmissions using spatial multiplexing and increases transmission efficiency. Relay station devices (110-1, 110-2) relay a plurality of data series using multi-user MIMO transmission. A first CSI that indicates the estimated state of a propagation channel between own relay station devices (110-1, 110-2) and a relay source (100) is generated and sent to the relay source (100). Pre-coding is done on the basis of the first CSI, and after guaranteeing the propagation channel, pre-coding of the received data series, from among the plurality of data series sent simultaneously to the own relay station devices (110-1, 110-2) from the relay source (100), is done on the basis of a second CSI that indicates the estimated state of a propagation channel between the own wireless relay station devices (110-1, 110-2) and a plurality of relay destinations (120-1 to 120-8), respectively, and the data series are simultaneously sent to the plurality of relay destinations (120-1 to 120-8).</p> |
