METHOD FOR ESTIMATING THE CARRIER FREQUENCY OF A DIGITAL PHASE MODULATION SIGNAL

摘要

The invention relates to a method for estimating the carrier frequency of a N-phase modulated digital signal representing N symbols in which a preliminary filtering of the received signal is performed, a multiplication of the phase of the signal received by the number N, the Fourier transform of the received phase signal multiplied by N, and the determination of the frequency (fo) for which the Fourier transform is maximum. According to the invention, after the multiplication of the phase by N, and before performing the Fourier transform, an additional filtering (24) with steep edges, and flat in the band, of width equal to the range of uncertainty (DELTAfo) of the Nfo frequency and centered on this range. / P