Analysis of adaptive interference cancellation using common-mode information in wireline communications

  • Authors:
  • Thomas Magesacher;Per Ödling;Per Ola Börjesson

  • Affiliations:
  • Department of Information Technology, Lund University, Lund, Sweden;Department of Information Technology, Lund University, Lund, Sweden;Department of Information Technology, Lund University, Lund, Sweden

  • Venue:
  • EURASIP Journal on Advances in Signal Processing
  • Year:
  • 2007

Quantified Score

Hi-index 0.00

Visualization

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.