Acquiring a spread spectrum signal

H - Electricity – 04 – B

Patent

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H04B 1/69 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2294219

A spread spectrum signal is detected at an unknown spreading signal phase by sampling the signal at a selected sampling rate (104) and performing a despreading function (114) on the sampled signal using multiple reference signals (116), each of which represents one of multiple search phases of the spreading signal. Accumulation outputs then are produced by combining each despreading output with a phase-shifted version of the corresponding accumulation output (114).

On parvient à détecter un signal à étalement du spectre à une phase d'étalement inconnue, en échantillonnant le signal à une vitesse d'échantillonnage selectionnée (104) et en exécutant une fonction de désétalement (114) sur le signal échantillonné à l'aide de multiples signaux de référence (116), représentant chacun l'une des multiples phases de recherche du signal à étalement. On produit ensuite des sorties d'accumulation en combinant chaque sortie de désétalement avec une version déphasée de la sortie d'accumulation correspondante (114).

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