Wireless communication system, wireless communication method, transmitting station device and receiving station device

A wireless communication method for performing transmission using a multiple-input multiple-output (MIMO)-single carrier (SC)-frequency domain equalization (FDE) (MIMO-SC-FDE) scheme between a transmission station device and a reception station device, the method comprising, by the transmission station device:

• generating, as a training signal, a predetermined known signal for the reception station device to estimate a channel response;
• adding a cyclic prefix (CP) with a predetermined CP length for removing inter-block interference for a transmission signal block;
• and
• transmission beamforming for forming a transmission beam in a time domain using a transmission weight for removing inter-antenna interference the method comprising, by the reception station device:
• removing the CP added to a received signal;
• receiving the known signal and estimating the channel response;
• and
• removing inter-symbol interference in a frequency domain using a reception weight, and the method comprising, by either the transmission station device or the reception station device, calculating the transmission weight and the reception weight based on the channel response, calculating an effective channel input response (CIR) length between a plurality of antennas based on the channel response, and calculating CIR lengths of a plurality of items of the reception weight based on the effective CIR length and setting a maximum CIR length among the CIR lengths of the plurality of items to the CP length.

A transmission station device configured to perform transmission to and from a reception station device using a multiple-input multiple-output (MIMO)-single carrier (SC)-frequency domain equalization (FDE) (MIMO-SC-FDE) scheme, the transmission station device comprising:

• a training signal generation unit configured to generate a predetermined known signal for the reception station device to estimate a channel response;
• a CP addition unit configured to add a cyclic prefix (CP) with a predetermined CP length for removing inter-block interference for a transmission signal block;
• a transmission beamforming unit configured to perform transmission beamforming in a time domain using a transmission weight for removing inter-antenna interference;
• a weight calculation unit configured to calculate, based on the channel response estimated by the reception station device, the transmission weight and a reception weight used for equalization in the reception station device;
• an effective CIR length calculation unit configured to calculate, based on the channel response, an effective channel input response (CIR) length between a plurality of antennas;
• and
• a CP length setting unit configured to calculate CIR lengths of a plurality of items of the reception weight based on the effective CIR length and set a maximum CIR length among the CIR lengths of the respective items to the CP length.