Patent ID: 7170957

Claim:
Device for the digital demodulation of a signal received in respect of a digital communication receiver, comprising: a stage for sampling the signal received with an oversampling factor of P samples per symbol, configured to output an oversampled signal; a stage for chopping the oversampled signal into successive blocks of samples; and means for correcting a sampling time for each successive block of samples, said means for correcting comprising, a polyphase filter comprising a set of N distinct elementary digital filters, and means for selecting one elementary digital filter for each block, from the set of N distinct elementary filter; where the means for selecting one elementary digital filter comprise; means for computing error signals, means for comparing performance indicators for the elementary digital filters implemented for at least two successive blocks, wherein performance indicators arise from the error signals, and means for determining the elementary digital filter to be implemented for a next block based on a function of a result of the means for comparing, wherein the distinct elementary digital filters are ordered, and the means for determining is configured to choose an elementary digital filter whose rank with respect to an elementary digital filter that was previously selected is shifted by a number of spaces, according to the order of the elementary digital filters, and is shifted in a direction determined by the result of the means for comparing performance indicators, wherein the comparison is performed for at least one previous block.