A non-transitory computer-readable recording medium on which a program is recorded for a causing a processor to execute a demodulation process. The demodulation process includes detecting a preamble of a wireless signal transmitted from a first transmission station by way of a short wavelength carrier wave, extracting a first signal superimposed on the short wavelength carrier wave, the first signal being extracted from a wireless signal that is identified in accordance with the detection of the preamble, extracting a second signal superimposed on a carrier wave transmitted from a second transmission station, and performing demodulation on a target demodulation signal obtained by superimposing the first signal on the second signal.