Receiver and receiving method

Abstract

To provide a receiver and a receiving method capable of measuring propagation time without matching the phase of a local oscillation signal to the phase of a carrier wave.SOLUTION: A receiver includes a transmission information holding unit for holding a signal of a pseudorandom number sequence used in phase shift keying for a carrier wave in a transmitter, a reception information acquisition unit for acquiring a reception signal which is a signal after phase shift keying transmitted by the transmitter, a demodulator for demodulating the received signal acquired by the reception information acquisition unit by performing quadrature detection, and a correlation calculator 24 having a cross-correlation calculator 241 for regarding the signal demodulated by the demodulator as a complex number and calculating a correlation function with the signal of the pseudorandom number sequence held by the transmission information holding unit, an absolute value calculator 242 for calculating an absolute value of the complex number correlation function calculated by the cross-correlation calculator 241, and a propagation time calculator 243 for calculating a propagation time by calculating the position of a peak of the absolute value calculated by the absolute value calculator 242.SELECTED DRAWING: Figure 5

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