Wireless communication system, wireless communication method, and transmission device

A wireless communication method for performing transmission by SC-MIMO between a transmission apparatus including a plurality of antennas and a reception apparatus including the number of antennas different from the number of antennas of the transmission apparatus, the wireless communication method comprising:

• generating, by the transmission apparatus, a known signal predetermined;
• adding, by the transmission apparatus, a CP to at least one symbol of a transmission signal including the known signal;
• removing, by the reception apparatus, the CP added to a reception signal;
• estimating, by the reception apparatus, a channel matrix based on the known signal;
• generating, by the transmission apparatus or the reception apparatus, a transmission weight based on a transposed adjugate matrix that is a product of the channel matrix and a complex conjugate transpose of the channel matrix;
• using, by the transmission apparatus, the transmission weight to form a transmission beam for the transmission signal where the CP is added;
• and
• performing, by the reception apparatus, equalization processing on the reception signal where the CP is removed.

A transmission apparatus including the number of antennas different from a reception apparatus and performing transmission by SC-MIMO to and from the reception apparatus, the transmission apparatus comprising:

• a training signal generation circuitry configured to generate a known signal predetermined;
• a CP addition circuitry configured to add a CP to at least one symbol of a transmission signal including the known signal;
• a weight generation circuitry configured to generate a transmission weight based on a transposed adjugate matrix that is a product of a channel matrix estimated based on the known signal by the reception apparatus and a complex conjugate transpose of the channel matrix;
• and
• a transmission beam formation circuitry configured to use the transmission weight to form a transmission beam for the transmission signal where the CP is added.