Method and device for a full-duplex-capable radio...

H - Electricity – 04 – B

Patent

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Details

H04B 7/26 (2006.01) H04J 3/06 (2006.01) H04B 1/56 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2340644

The invention relates to a synchronization method and device for a full-duplex radio transmission system with code division multiple access and TDD, comprising a central radio base station and a plurality of independent subscriber stations. According to the invention, a matched filter having an amplitude threshold switch positioned downstream is assigned to each individual subscriber station on the reception side. The method consists of the following steps: a) a maximum or Gold sequence specific to each radio transmission system is generated by a radio base station; b) the maximum or Gold sequence generated is sent to all subscriber stations as a preamble (1) before the actual user data transmission (2); c) the preamble (1) is received by the subscriber stations; d) the received preamble (1) is transmitted to the input of the corresponding matched filter; e) the output signal of the matched filter is transferred to the amplitude threshold switch; and f) a trigger signal is generated by the amplitude threshold switch when a defined threshold value Tr1 is exceeded.

L'invention concerne un procédé et un dispositif de synchronisation destiné à un système de transmission radio duplex intégral exploité en duplex temporel. Le système comprend une station de base radio centrale et une pluralité de stations d'abonnés indépendantes les unes des autres. Chaque station d'abonné comporte, du côté réception, un filtre accordé auquel est connecté en aval un commutateur à seuil d'amplitude. Le procédé comprend les étapes suivantes: a) génération par la station de base d'une séquence maximale ou d'une séquence d'or spécifique de chaque système de transmission radio; b) envoi de ladite séquence, sous forme de préambule (1) précédant l'émission des données utiles (2), à toutes les stations d'abonnés; c) réception du préambule (1) par lesdites stations; d) transfert du préambule reçu (1) à l'entrée du filtre accordé correspondant; e) transmission du signal de sortie dudit filtre au commutateur à seuil d'amplitude; et f) génération par ledit commutateur d'un signal de déclenchement en cas de dépassement d'une valeur seuil Tr¿1? prédéfinie.

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