Digital communication system having improved color code...

H - Electricity – 04 – B

Patent

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H04B 7/212 (2006.01) H04B 7/26 (2006.01)

Patent

CA 2510575

A time division multiple access communication system (10) is provided having multiple sub-channels according to known quadrature amplitude modulation techniques. Each sub-channel has a pre-determined time duration and is divided by a pre-determined number of symbol position time divisions. The symbol positions carry sync, pilot and data symbols. Color code information is incorporated into the sync and pilot symbols. The QAM constellation value of the sync symbol is mapped to a color code value. In addition, the sync symbol carries a color code extension which enlarges the color code space.

Un système (10) de communication à accès multiple par répartition dans le temps est prévu avec plusieurs sous-canaux réalisés conformément à des techniques connues de modulation d'amplitude en quadrature. Chaque sous-canal a une durée prédéterminée et se trouve divisé par un nombre prédéterminé de divisions temporelles de position de symbole. Les positions de symbole supportent des symboles sync, pilotes et de données. Des informations de codes de couleur sont incorporées dans les symboles sync et pilotes. La valeur de la constellation de modulation d'amplitude en quadrature (MAQ) du symbole sync est transposée sur une valeur de code de couleur. Le symbole sync porte également une extension du code de couleur qui étend l'espace du code de couleur.

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