Downlink channel handling within a spread spectrum...

H - Electricity – 04 – B

Patent

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H04B 7/26 (2006.01)

Patent

CA 2300996

With respect to a direct sequence, code division multiple access spread spectrum transmitter, symbol information relating to dedicated/common channels (114, 116) (such as the traffic or control channels) is spread to generate a plurality of corresponding dedicated/common channel intermediate signals. These intermediate signals are then summed (150) to generate an output signal (152) that is scrambled by a selected scrambling code. Symbol information relating to acquisition-related channels (such as synchronization information or the pilot or long code group code channels) (116) is also spread to generate a plurality of corresponding acquisition-related intermediate signals. These acquisition-related intermediate signals are then selectively (164) added (158) to the scrambled output signal producing a downlink signal (160) for multi-channel transmission over a communications medium (162) sharing one transmission communications frequency.

Dans un émetteur à spectre étalé d'accès multiple par code de répartition à séquence directe, les informations de symboles relatives à des canaux réservés/ communs (114, 116) (tels que des canaux de trafic ou de commande) sont étalées afin de produire plusieurs signaux intermédiaires de canaux réservés/ communs correspondants. Ces signaux intermédiaires sont ensuite additionnés (150) pour produire un signal (152) de sortie qui est brouillé au moyen d'un code de brouillage sélectionné. Des informations de symboles relatives à des canaux d'acquisition (tels des canaux d'informations de synchronisation, des canaux pilotes ou de groupe à code long) (116) sont également étalées de façon à produire plusieurs signaux intermédiaires d'acquisition correspondants. Ces signaux intermédiaires d'acquisition sont ensuite additionnés (158) de manière sélective (164) au signal de sortie brouillé pour produire un signal (160) de liaison descendante en vue d'une transmission multicanaux sur un support (162) de communications partageant une fréquence de transmission.

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