Patent ID: 7443341

Claim:
A transmitting apparatus, comprising: a plurality of transmitting antennas which transmit multicarrier signals composed of a plurality of streams; an acquisition unit which acquires, per carrier, a channel matrix having elements the number of which is determined by the number of said plurality of transmitting antennas and the number of a plurality of receiving antennas provided in a receiving apparatus wherein values of the elements represent channel characteristics between said plurality of transmitting antennas and the plurality of receiving antennas, respectively; a first derivation unit including a means which derives a common autocorrelation matrix for the channel matrix acquired by said acquisition unit per carrier and a means which derives a steering matrix by eigenvalue-decomposing the derived common autocorrelation matrix; a second derivation unit which derives, per carrier, weight vectors for a plurality of streams in a manner such that an orthonormalization is performed respectively on matrices obtained by operating the steering matrix derived by said first derivation unit on the channel matrix per carrier; and a transmitter which transmits, from said plurality of transmitting antennas, the multicarrier signals composed of a plurality of streams by using the weight vectors derived by said second derivation unit.