A method and apparatus for providing carrier frequency...

H - Electricity – 04 – J

Patent

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Details

H04J 3/06 (2006.01) H04B 7/212 (2006.01) H04L 27/233 (2006.01) H04L 25/02 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2102495

The present invention relates to a method and apparatus for providing carrier frequency offset compensation in a time division multiple access (TDMA) communication system (100). In this effort a TDMA receiver (105, 107, 109, 111) is adapted to receive, via a transmission channel, a transmitted signal burst which includes a synchronization signal pattern, a message signal portion and at least one known portion, in a TDMA time slot. Initially, a phase error at that portion of the received signal which corresponds to the known portion of the transmitted signal is determined. Thereafter, various received signal parameters are adjusted in order to eliminate the phase error and thereby compensate for any carrier frequency offsets.

La présente invention est constituée par une méthode et un appareil servant à corriger le décalage de la fréquence de porteuse d'un système de communication (100) à accès multiple à répartition dans le temps (AMRT). Dans cette invention, un récepteur AMRT (105, 107, 109, 111) est adapté pour recevoir, via un canal de communication, une salve de signaux comportant un signal de synchronisation, un signal de message et au moins une partie connue, dans une fenêtre de temps AMRT. Initialement, l'erreur de phase dans la partie du signal reçu qui correspond à la partie connue du signal émis est déterminée. Ensuite, divers paramètres du signal reçu sont ajustés pour éliminer l'erreur de phase et corriger ainsi tout déclalage de la fréquence de porteuse qui pourrait être présent.

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