Open Access

Analysis of Adaptive Interference Cancellation Using Common-Mode Information in Wireline Communications

EURASIP Journal on Advances in Signal Processing20072007:084956

https://doi.org/10.1155/2007/84956

Received: 4 September 2006

Accepted: 1 June 2007

Published: 31 July 2007

Abstract

Joint processing of common-mode (CM) and differential-mode (DM) signals in wireline transmission can yield significant improvements in terms of throughput compared to using only the DM signal. Recent work proposed the employment of an adaptive CM-reference-based interference canceller and reported performance improvements based on simulation results. This paper presents a thorough investigation of the cancellation approach. A subchannel model of the CM-aided wireline channel is presented and the Wiener solutions for different adaptation strategies are derived. It is shown that a canceller, whose coefficients are adapted while the far-end transmitter is silent, yields a signal-to-noise power ratio (SNR) that is higher than the SNR at the DM channel output for a large class of practically relevant cases. Adaptation while the useful far-end signal is present yields a front-end whose output SNR is considerably lower compared to the SNR of the DM channel output. The results are illustrated by simulations based on channel measurement data.

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Authors’ Affiliations

(1)
Department of Information Technology, Lund University

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Copyright

© Thomas Magesacher et al. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.