Patent ID: 7272294

Claim:
A wireless communication system in which a transmitting device having a plurality of transmitting antennas and a receiving device having a plurality of receiving antennas communicate in an orthogonal frequency division multiplexing system, said transmitting device comprising: a status acquiring unit acquiring a channel matrix generated by previous signals from said receiving device; a partition unit partitioning a transmission data sequence into a plurality of data streams; and a mapping unit mapping each of the plurality of data streams to each of the plurality of transmitting antennas by using, for a precoding matrix, columns, corresponding to a stream count of the plurality of data streams, of a right singular matrix acquired by singular value decomposition of the channel matrix, and said receiving device comprising: an estimation unit estimating a present channel status from received signals and generating a present channel matrix representing the present channel status; and a decoding unit Viterbi-decoding the received signals by weighting a path metric by using a weighting coefficient corresponding to a signal-to-noise ratio obtained from the present channel matrix.