Interference mitigation method and apparatus for multiple...

H - Electricity – 04 – B

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H04B 15/00 (2006.01) H04B 1/40 (2006.01) H04B 1/52 (2006.01) H04B 7/005 (2006.01) H04B 1/04 (2006.01) H04B 1/12 (2006.01)

Patent

CA 2197693

An apparatus and method for mitigating interference between multiple collocated radio transceivers operating through a common antenna. In a preferredform, the apparatus includes a filter bank containing bandpass filters corresponding to a number of desired operating frequency bands. Each transceiver can be selectively electrically interconnected with the common antenna through an appropriate filter. The filters attenuate out-of-band interference. An adaptive cancellation device is also provided to compare samples of the transmitted and received signals and produce an interference cancellation signal that is substantially equal in amplitude and 180° out of phase with the coherent portions of the compared and received signals.

Appareil et méthode pour atténuer le brouillage entre de multiples émetteurs-récepteurs radio situés au même endroit et utilisant une même antenne. Dans une version préférée, l'appareil comprend un banc de filtres contenant des filtres passe-bande correspondant à un certain nombre de bandes de fréquences d'exploitation désirées. Chaque émetteur-récepteur peut sélectivement être interconnecté électriquement avec l'antenne commune au moyen d'un filtre convenable. Les filtres atténuent le brouillage hors bande. En outre, un dispositif adaptatif d'annulation permet de comparer des échantillons des signaux émis et reçus et de produire un signal d'annulation de brouillage qui est sensiblement égal en amplitude et déphasé de 180.degré. par rapport aux parties cohérentes des signaux comparés et reçus.

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