Receiving device

A receiving device comprising:

• a receiver that receives a frequency multiplex signal;
• a Fourier transformation unit that transforms the received frequency multiplex signal to a frequency domain signal on the basis of a window that specifies a time zone of Fourier transformation;
• a first estimator that extracts a group of candidates of multipath signal for the frequency multiplex signal on the basis of a time-domain waveform generated by inverse Fourier transformation of a plurality of pilot signals inserted into the transformed frequency multiplex signal at a predetermined frequency interval;
• a second estimator that extracts a multipath signal from the group of candidates of the multipath signal on the basis of a calculated autocorrelation value between the frequency multiplex signal and a frequency multiplex signal which is delayed in accordance with a pulse width and a pulse generation timing of the extracted candidate of the multipath signal;
• and
• a window control unit that adjusts the timing of the window on the basis of the pulse generation timing of the extracted multipath signal.

A receiving method executed by a receiving device, comprising:

• receiving a frequency multiplex signal by the receiving device;
• transforming, by the receiving device, the received frequency multiplex signal to a frequency domain signal on the basis of a window that specifies a time zone of Fourier transformation;
• extracting, by the receiving device, a group of signals of multipath signal candidates for the frequency multiplex signal on the basis of a time-domain waveform generated by inverse Fourier transformation of a plurality of pilot signals inserted into the transformed frequency multiplex signal at a predetermined frequency interval;
• extracting, by the receiving device, a multipath signal from the group of signals of the multipath signal candidates on the basis of an autocorrelation arithmetic value between the frequency multiplex signal and a frequency multiplex signal which is delayed in accordance with a pulse width and a pulse generation timing of the extracted multipath signal candidate;
• and
• adjusting, by the receiving device, the timing of the window on the basis of the pulse generation timing of the extracted multipath signal appearing.