A demodulation system for demodular input signal modulated in phase (SI).Motion detector capable of detecting the direction of the movement of an object and method for demodulation of an input signal modulated in phase (SI)

摘要

A demodulating system (100) for demodulating a phase-modulated input signal (Si) comprises: a complex demodulator (110), having a first input (111) for receiving the phase-modulated input signal (Si) and being designed to perform complex multiplication of this signal with an approximation of the inverse of the phase modulation; a spectrum analyzing device (130) receiving the demodulated product signal produced by the complex demodulator (110) and capable of analyzing the frequency spectrum of the demodulated product signal.