Method and apparatus for utilizing multiple spreading codes...

H - Electricity – 04 – B

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H04B 1/69 (2006.01) H04B 1/04 (2006.01) H04B 1/707 (2006.01) H04J 11/00 (2006.01)

Patent

CA 2158356

A communication system utilizes multiple spreading codes to transmit high data rate information. The system codes high data rate user information (201) and partitions the coded information (202) into blocks comprised of two bits, B1 and B2. Based on the representation of bits B1 and B2, the system chooses one of a possible four spreading codes (W1 and W2 and their phase reversals W1' and W2') to be utilized for transmission. Once received, the transmitted signal is input into correlators (306, 309) specific to each spreading code W1 and W2, and the maximum absolute value output from the correlators (306, 309) is determined. From this determination, the transmitted spreading code W1, W2, W1' or W2' is determined. The use of multiple spreading codes allows for the transmission of high data rate information without altering the wireless air interface of the communication system.

Un système de communication utilise des codes multiples de dispersion pour transmettre une information avec un débit élevé. Le système code une information utilisateur à un débit élevé (201) et sépare l'information codée (202) en blocs constitués de deux bits, B1 et B2. Le système se base sur la représentation des bits B1 et B2 pour choisir un des quatre codes de dispersion possibles (W¿1? et W¿2? et leurs inverses en phase W¿1?' et W¿2?') utilisables pour la transmission. Une fois reçu, le signal transmis est entré dans des corrélateurs (306, 309) spécifiques de chaque code de dispersion W¿1? et W¿2? et on détermine la valeur maximale absolue sortant des corrélateurs (306, 309). A partir de ces déterminations, on détermine le code de dispersion (W¿1?, W¿2?, W¿1?' ou W¿2?' transmis. L'utilisation de codes de dispersion multiples permet une transmission de données à un débit élevé, sans altérer l'interface entre l'appareil de radiodiffusion et l'air.

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