Wireless communication system, wireless communication method, transmitter, and receiver

A wireless communication method in which a transmission device and a reception device perform wireless communication using n (n≥2) frequency channels, the method comprising:

• a conversion step of converting n+1 signals into n predetermined power signals obtained by setting a carrier-to-noise ratio (C/N) to a predetermined value and into n divided signals obtained by setting the C/N to 1/n of the predetermined value and performing division into n;
• a superimposition step of superimposing the n predetermined power signals and the n divided signals that have been converted, non-orthogonally so as to be n multiplexed signals for the n frequency channels;
• a transmission step of simultaneously transmitting the n multiplexed signals obtained by superimposing, by the n frequency channels;
• a reception step of receiving the n multiplexed signals transmitted by the n frequency channels;
• a demodulation step of demodulating the n predetermined power signals from the n multiplexed signals that have been received;
• a replica creation step of duplicating each of the n predetermined power signals that have been demodulated and creating n replica signals;
• a subtraction step of subtracting each of the n replica signals that have been created from each of the n multiplexed signals that have been received to calculate n subtracted signals;
• and
• a combining step of combining the n subtracted signals that have been calculated.

A transmission device that performs wireless communication with a reception device by using n (n≥2) frequency channels, the transmission device comprising:

• a conversion unit that converts n+1 signals into n predetermined power signals obtained by setting a carrier-to-noise ratio (C/N) to a predetermined value and into n divided signals obtained by setting the C/N to 1/n of the predetermined value and performing division into n;
• a superimposition unit that superimposes the n predetermined power signals and the n divided signals converted by the conversion unit non-orthogonally so as to be n multiplexed signals for the n frequency channels;
• and
• a transmission unit that simultaneously transmits the n multiplexed signals obtained by superimposing by the superimposition unit by the n frequency channels.