COMMUNICATION SYSTEM, COMMUNICATION NODE AND COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a communication system which suppresses the deterioration of reception signal quality in a destination node rather than the prior art when transmitting a signal from a source node to the destination node using a multi-hop scheme and a MIMO scheme.

SOLUTION: A relay node comprising the communication system determines first and second unitary matrices and a transform matrix based on channel matrices with the source node and with the destination node. These matrices are multiplied to a reception signal of the relay node and transmitted to the destination node. The destination node detects a desired signal from the reception signal. In another mode, the relay node multiplies the reception signal by a third unitary matrix and separates transmission signals from the desired source node and from the others. The third unitary matrix is comprised of unitary matrices resulting from performing singular value decomposition involving one or more channel matrices with source nodes other than the desired source node.

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