METHOD OF SYNCHRONOUS DEMODULATION AND RECORDING MEDIUM FOR THIS METHOD, SYNCHRONOUS DEMODULATOR AND SENSOR INCORPORATING THIS DEMODULATOR

摘要

This method of synchronous demodulation allows the extraction of the d-th derivative from a modulated signal e(t) defined by the following relation e (t ) =p (t ) y (t ), where p(t) is a carrier. The method comprises the calculation (84) of a product eiqi, in which the series of samples qi is correlated with the series of values p(t1) and depends on an impulse response h(t) of a finite impulse response filter of order n which is a solution of a system with n+1 equations, where each of the n+1 equations is defined by the following relation: