Filtering communications channels within telecommunications...

H - Electricity – 04 – B

Patent

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H04B 1/10 (2006.01) H04B 7/185 (2006.01)

Patent

CA 2708504

A means of filtering communications channels in a telecommunications satellite to remove large unwanted interfering signals, comprising monitoring channels of an uplink signal by stepping across a channel with a first analog agile filter having a narrow bandwidth in relation to the channel, and at each step monitoring the signal within the channel step, in order to determine the presence of interfering signals, and configuring a second analog agile filter having an adjustable band stop function to block the interfering signals. The uplink signal has first and second signal paths for said uplink signal, and including demultiplexing the channels of said uplink signal onto separate lines in said first path, carrying out the band stop function within the second signal path, and replacing with the remaining filtered part of the channel, by means of a switching operation, the demultiplexed version of the channel.

L'invention porte sur un moyen de filtrage de canaux de communications dans un satellite de télécommunications pour éliminer de grands signaux brouilleurs indésirables. Ledit moyen consiste à surveiller des canaux d'un signal de liaison montante par analyse pas à pas d'un canal à l'aide d'un premier filtre agile analogique ayant une bande passante étroite par rapport au canal, et à chaque pas, à surveiller le signal dans le pas de canal, afin de déterminer la présence de signaux brouilleurs, et à configurer un second filtre agile analogique ayant une fonction coupe-bande ajustable permettant de bloquer les signaux brouilleurs. Le signal de liaison montante a des premier et second trajets de signal pour ledit signal de liaison montante, et consiste à démultiplexer les canaux dudit signal de liaison montante sur des lignes séparées dans ledit premier trajet, à exécuter la fonction coupe-bande dans le second trajet de signal, et à effectuer, au moyen d'une opération de commutation, le remplacement de la version démultiplexée du canal par la partie filtrée restante du canal.

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