Method and apparatus for digital symbol detection using...

Details Method and apparatus for digital symbol detection using... Method and apparatus for digital symbol detection using...

H - Electricity

04

L

H04L 25/03 (2006.01) H04B 1/707 (2006.01) H04B 7/005 (2006.01) H04L 25/02 (2006.01)

Patent

CA 2274843

According to the present invention, the effects of the transmission medium on transmitted information symbols are estimated separately from other effects, e.g., those associated with receive and transmit filters, using knowledge of the pulse shaping. The medium response estimate is then used to detect information symbols. Previously, receivers had used estimates of the composite channel to detect symbols. This, however, assumed uncorrelated noise, which is not always the case.

Selon la présente invention, pour l'exploitation des connaissances relatives à la mise en forme de impulsions, les effets du support de transmission sur les symboles d'information transmis ne sont pas estimés en même temps que les autres effets, comme, par exemple, les effets rencontrés dans le cas des filtres d'émission et de réception. L'estimation de la réponse du support permet ainsi de détecter les symboles d'information. Auparavant, les récepteurs ont utilisé, pour la détection des symboles, des estimations concernant le canal composite. Ce procédé supposait toutefois des bruits non corrélés, ce qui n'est pas toujours le cas.

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