Patent ID: 9553748
Date: 2017-01-24
CPC Classifications: H04L

Claim:
1. A synchronous demodulator electronic circuit for phase modulation signals, wherein the electronic circuit comprises: in a control loop, discrete Fourier transform circuitry configured to receive a phase modulation signal to be demodulated, and circuitry configured to recover a carrier frequency of the phase modulation signal, said circuitry configured to recover the carrier frequency including phase extraction circuitry configured to receive at least one demodulated signal at an output of the discrete Fourier transform circuitry, a loop filter connected to an output of the phase extraction circuitry, and a phase accumulator connected to an output of the loop filter, to control a carrier frequency adaptation in the discrete Fourier transform circuitry, so that the discrete Fourier transform circuitry is configured to perform in combination operations of mixing and low-pass filtering a sampled phase modulation signal with at least one frequency and a phase adapted digital conversion signal to supply the at least one demodulated signal at the output of the discrete Fourier transform circuitry, and wherein the discrete Fourier transform circuitry is further configured to perform digital low-pass filtering by a temporal sampling window of defined duration for a discrete Fourier transform.