Wireless communication method, wireless communication system, and transmission device

A wireless communication system comprising:

• a transmission device;
• and
• a reception device, wherein
• the transmission device is configured to execute:
• phase shift amount determination processing that determines a random phase shift amount for each of subcarriers of transmission data;
• signal addition processing that adds a known signal, which is to be used in the reception device for estimating the random phase shift amount, to the transmission data;
• modulation processing that modulates the transmission data and further shifts a phase according to the random phase shift amount for each of the subcarriers;
• precoding processing that performs precoding on the transmission data after the modulation processing;
• and
• transmission processing that transmits the transmission data after the precoding processing from the transmission device to the reception device, wherein
• the signal addition processing is performed for each predetermined data unit that a slot, and
• the signal addition processing adds the known signal to head or end of the predetermined data unit.

A transmission device that performs wireless communication with a reception device,

• the transmission device comprising processing circuitry configured to:
• determine a random phase shift amount for each of subcarriers of transmission data;
• add a known signal, which is to be used in the reception device for estimating the random phase shift amount, to the transmission data;
• modulate the transmission data and further shift a phase according to the random phase shift amount for each of the subcarriers;
• perform precoding on the transmission data after modulation;
• and
• transmit the transmission data after the precoding to the reception device, wherein
• the addition of the known signal is performed for each predetermined data unit a slot, and
• the known signal is added to head or end of the predetermined data unit.