Generic, reduced state, maximum likelihood decoder

H - Electricity – 03 – M

Patent

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Details

H03M 13/41 (2006.01) H04L 1/00 (2006.01) H04L 27/18 (2006.01)

Patent

CA 2675643

A decoder includes at least one programming input for a plurality of programmable reduced-state trellis parameters. A programmable device is connected to the at least one programming input and implements a reduced-state maximum likelihood decoder that is operable for processing a continuous phase modulated (CPM) signal and returning up to N bits that were transmitted based on a maximum likelihood and current winning super-state and corresponding survivor full-state. The programmable device calculates the path metrics for every super-state and determines a best path based on the reduced-state trellis parameters.

La présente invention concerne un décodeur qui comprend au moins une entrée de programmation destinée à une pluralité de paramètres de treillis programmables d'état réduit. Un dispositif programmable est relié à la ou les entrées de programmation et réalise un décodeur d'état réduit à vraisemblance maximale qui peut fonctionner pour traiter un signal modulé par phase continue (CPM) et pour renvoyer N éléments binaires qui ont été transmis en fonction d'une vraisemblance maximale et d'un état supérieur d'extraction actuel et d'un état complet survivant correspondant. Le dispositif programmable calcule les métriques de chemin pour chaque état supérieur et détermine la meilleure trajectoire en fonction des paramètres de treillis d'état réduit.

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