Method and apparatus for fast pilot channel acquisition...

H - Electricity – 04 – B

Patent

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H04B 7/26 (2006.01) H04Q 7/32 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2213960

Performance of a radiotelephone (104) in a CDMA communication system (100) is enhanced using a receiver searcher (114) that includes a matched filter (128) to capture the pilot energies of all receivable transmissions from a base station (102) and other nearby base stations. A detected PN sequence is compared with a predetermined PN sequence stored at the radiotelephone (104). The predetermined PN sequence includes, for example, the last 512 chips in the short PN sequence used for spreading the in-phase channel and the quadrature-phase channel.

La performance d'un radiotéléphone (104) dans un système de communication AMDC (100) est améliorée à l'aide d'un chercheur de récepteurs (114) comprenant un filtre adapté (128) pour capter les canaux pilotes de toutes les transmissions qui peuvent être reçues d'une station de base (102) et des stations de base voisines. Une séquence PN détectée est comparée à une séquence PN prédéterminée stockée dans le radiotéléphone (104). Cette séquence PN prédéterminée comprend, par exemple, les 512 derniers éléments de la séquence PN courte utilisée pour l'étalement du canal en phase et du canal en quadrature de phase.

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