A code synchronization unit and method

H - Electricity – 04 – J

Patent

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H04J 13/02 (2006.01) H04B 1/707 (2006.01) H04L 7/04 (2006.01) H04L 27/30 (2006.01)

Patent

CA 2285339

A pilot acquisition unit for code division multiple access (CDMA) communication systems is provided which includes a fast Hadamard transform (FHT) unit (20) and a pre-Hadamard processing unit (22). The FHT unit determines the quality, in accordance with a metric, of each of a set of possible pseudo-random number (PN) loadings and the pre-Hadamard processing unit generates a vector u per set of PN loadings. The vector u defines a quality metric of a received pilot signal with the set of possible PN loadings, the pre-Hadamard processing unit providing the vector u to the FHT unit.

L'invention concerne une unité d'acquisition d'un signal pilote, destinée à des systèmes de communication à accès multiple par répartition de code (AMRC), qui comprend une unité à transformée d'Hadamard rapide (FHT) et une unité de traitement pré-Hadamard. L'unité FHT détermine la qualité, en fonction d'une mesure, de chaque série de charges de nombres pseudo-aléatoires (PN) possibles, et l'unité de traitement pré-Hadamard génère un vecteur u pour chaque série de charges PN. Le vecteur u définit une mesure de la qualité d'un signal pilote reçu avec la série de charges PN possibles, l'unité de traitement pré-Hadamard transmettant le vecteur u à l'unité FHT.

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