An antenna diversity system

H - Electricity – 01 – Q

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H01Q 1/00 (2006.01) H01Q 21/30 (2006.01) H04B 7/08 (2006.01)

Patent

CA 2545517

A method, device and system for reducing the number of feeders (2, 3) between a radio base station (1) and an antenna diversity arrangement (10, 11, 12, 13) at which RF signals of the same frequency are received. In a tower mounted amplifier (45) individual RF signals from some or all of the antennas are frequency converted into intermediate frequency (IF) signals on mutually different intermediate frequencies which are combined and forwarded to the radio base station on a reduced number of feeders. In the radio base station the combined signal is split into individual signals amongst which the IF signals are frequency transformed to a signal suitable for diversity processing.

La présente invention se rapporte à un procédé, à un dispositif et à un système permettant de réduire le nombre de lignes d'alimentation (2, 3) entre une station de base radio (1) et un agencement à diversité d'antenne (10, 11, 12, 13) recevant des signaux RF de la même fréquence. Dans un amplificateur monté dans un pylône (45), des signaux RF émanant d'une partie ou de la totalité des antennes sont convertis en fréquence en des signaux de fréquence intermédiaire (IF) sur des fréquences intermédiaires mutuellement différentes, lesquels sont combinés et envoyés à la station de base radio sur un nombre réduit de lignes d'alimentation. Dans la station de base radio, le signal combiné est fractionné en signaux séparés, parmi lesquels les signaux IF sont convertis en fréquence en un signal convenant au traitement de diversité.

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