Demodulator for high bit rate transmission and corresponding demodulation method

A method for real-time processing of modulated data transmitted in the form of multiplexed frames containing symbols that have a symbol frequency, comprising:

• a frame selection processing operation performed at least partly at a working frequency below the symbol frequency;
• and
• a demodulation processing operation at least in part performed at the working frequency on the selected frames;
• wherein a frame comprises symbols sampled at a sampling frequency and the frame selection processing operation comprises:
• storing all the samples of all the frames in a memory;
• reading, at the working frequency, respective headers of all the frames so as to obtain said frames to be selected;
• and
• reading, at the working frequency, the selected frames and stored, and
• wherein said demodulation processing operation is implemented at the working frequency on the frames read.

A communication appliance, capable of processing in real time, modulated data transmitted in the form of multiplexed frames containing symbols that have a symbol frequency, comprising:

• a subsystem for processing received frames, said subsystem including:
• a selector configured to select, at least partly at a working frequency below the symbol frequency, some of the received frames, and
• a demodulator configured to perform at least a part of a demodulation processing operation at the working frequency on the selected frames;
• wherein a frame comprises symbols sampled at a sampling frequency and a header, the demodulator comprises a predemodulation module configured to perform, on all the frames, a predemodulation processing operation comprising a determination of the symbols from the samples and wherein the selector comprises:
• a header processor configured to determine, at the working frequency, predemodulated frames to be selected from their respective headers;
• and
• a memory configured to store, at a storage frequency below the symbol frequency, at least the selected predemodulated frames, and
• wherein the demodulator also comprises:
• a final demodulation module configured to perform, at the working frequency, on the predemodulated stored frames, a final demodulation processing operation.

A communication appliance, capable of processing in real time, modulated data transmitted in the form of multiplexed frames containing symbols that have a symbol frequency, comprising:

• a subsystem for processing received frames, said subsystem including:
• a selector configured to select, at least partly at a working frequency below the symbol frequency, some of the received frames, and
• a demodulator configured to perform at least a part of a demodulation processing operation at the working frequency on the selected frames;
• wherein a frame comprises symbols sampled at a sampling frequency, and the selector comprises:
• a memory configured to store all the samples of all the frames;
• and
• a header processor configured to read, at the working frequency, the headers of all the frames so as to obtain said frames to be selected,
• and wherein the demodulator comprises a demodulation module configured to read the selected frames in the memory at the working frequency and also configured to perform a demodulation processing operation at the working frequency on the frames read.