System and method for reducing interference generated by a...

H - Electricity – 04 – J

Patent

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H04J 3/10 (2006.01) H04B 15/02 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2251830

A system and method for reducing radio frequency interference arising in connection with pulsed transmission over time division multiplexed communication channels. In a first embodiment, a subscriber station (300) is nominally assigned all of the slots (TN0-TN7) of each frame of a first transmit channel (R0). By transmitting RF energy substantially continuously, the subscriber station reduces interference arising from pulsed transmission. In a second embodiment, a subscriber station (300) is nominally assigned one or more slots (TN0-TN7) of each frame of a primary channel (R0) for conventional transmission of useful information, and is also instructed to continuously transmit RF energy over an auxiliary channel (R1) at times other than during the assigned primary channel slots. In this way, interference generated in the vicinity of the subscriber station (300) is reduced due to the substantially continuous transmission of RF energy by the subscriber station (300). More than one subscriber station (300) may simultaneously utilize the auxiliary channel (R1) during reduced interference mode operation.

Système et procédé permettant de réduire les interférences des radiofréquences liées à la transmission pulsée par des canaux de communication à multiplexage par répartition dans le temps. Dans un premier mode de réalisation, tous les créneaux (TN0-TN7) de chaque trame d'un premier canal de transmission (R¿0?) sont attribués nominativement à un poste d'abonné (300). En émettant de l'énergie RF de manière sensiblement continue, le poste d'abonné réduit les interférences dues à la transmission pulsée. Dans un second mode de réalisation, un ou plusieurs créneaux (TN0-TN7) de chaque trame d'un canal primaire (R¿0?) sont attribués nominativement à un poste d'abonné (300) en vue de la transmission classique des informations utiles, et le poste reçoit également une instruction lui commandant de transmettre l'énergie RF en continu par un canal auxiliaire (R¿1?) à des moments où les créneaux des canaux primaires ne sont pas attribués. Ceci permet de réduire les interférences générées à proximité du poste d'abonné (300), du fait de la transmission d'énergie RF sensiblement continue par ledit poste (300). Plusieurs postes (300) peuvent utiliser simultanément le canal auxiliaire (R¿1?) durant le fonctionnement sur le mode réduction d'interférences.

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