Patent ID: 7388934

Claim:
A communication system comprising at least a transmitter and a receiver intended to receive symbols coming from a phase-shift keying modulation, and comprising estimation means for estimating a frequency error relating to a symbol based on a sequence of symbol phases, characterized in that said receiver comprises calculation means for calculating a phase sequence, called an initial sequence, based on decisions made on symbols, and means for detecting and correcting phase jumps in this initial sequence, to supply a phase sequence, called final sequence, to said frequency error estimation means; wherein said means for detecting and correcting phase jumps comprise: modifying means for modifying said initial sequence so as to produce a plurality of modified sequences, which each compensate for a phase jump configuration, calculation means for calculating straight line equations which determine the initial sequence and the modified sequences, and calculation means for calculating for the initial sequence and the modified sequences a mean difference between the initial or modified phases and the phases produced by the corresponding straight line equation, said final sequence being formed by the sequence whose mean difference is minimal.