Nonlinear interference suppressor for varying-envelope local interference in multimode transceivers

H. Habibi, E.J.G. Janssen, Yan Wu, P.G.M. Baltus, J.W.M. Bergmans

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Abstract

In multimode transceivers, a local transmitter may induce a large interference in a local receiver, often several orders of magnitude stronger than the desired received signal. To suppress this interference by linear filtering, the receiver would need a very large dynamic range, resulting in excessive power consumption. A potentially much more power-efficient approach uses an adaptive memoryless nonlinearity that can strongly suppress the interference when adapted proportional to the envelope of the received interference. This approach has so far been limited to constant-envelope interferences owing to the difficulty of extracting accurate interference envelope information from the received signal. In this paper, we observe that in multimode transceivers the locally available baseband interference enables accurate adaptation for varying-envelope interferences. We identify and analyze nonlinear distortion products which are negligible for constant-envelope interferences. We show that adequate interference suppression can be achieved along with a negligible distortion to the desired signal.
Original languageEnglish
Title of host publicationProceedings of 34th Symposium on Information Theory in the Benelux 30 and 31 May 2013, Leuven, Belgium
EditorsS. Pollin, L. Perre, Van der, A. Stas
Place of PublicationEnschede
PublisherUniversiteit Twente
Pages61-68
ISBN (Print)978-90-365-0000-5
Publication statusPublished - 2013
Eventconference; Benelux Symposium on Information Theory; 2013-05-30; 2013-05-31 -
Duration: 30 May 201331 May 2013

Conference

Conferenceconference; Benelux Symposium on Information Theory; 2013-05-30; 2013-05-31
Period30/05/1331/05/13
OtherBenelux Symposium on Information Theory

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