METHOD OF TRACKING THE PHASE OF A SIGNAL MODULATED BY CONTINUOUS-PHASE MODULATION AND SYNCHRONIZATION DEVICE IMPLEMENTING THE METHOD

摘要

The present invention relates to a method of tracking the phase of a signal modulated by a continuous-phase modulation, said method being characterized in that: a complex vector V(n) representative of the signal received is determined (44) for each symbol period with a shift of half a symbol period (43) with respect to the symbol rate of the receiver; a measurement of level (50, 53) is performed on two complex samples U(n) and U(n-1) distributed with a shift of substantially half a symbol period either side of the instant of estimation of the vector V(n); the complex vectors V(n) are associated (55) with one of the M points of the constellation of the modulation (51) making it possible to find the closest point; a mean estimation of the shift of the phase is calculated (60, 61, 62, 63) by calculating the difference between the mean estimation of the phase of the signal and the theoretical phase value associated with each point of the constellation; an absolute estimation and a differential estimation of the shift of the phase is calculated (64). The subject of the invention is also a method of synchronization. The subject of the invention is also a reception device implementing the synchronization method.