Open Access

Partial Crosstalk Cancellation for Upstream VDSL

  • Raphael Cendrillon1Email author,
  • Marc Moonen1,
  • George Ginis2,
  • Katleen Van Acker3,
  • Tom Bostoen3 and
  • Piet Vandaele3
EURASIP Journal on Advances in Signal Processing20042004:353820

https://doi.org/10.1155/S1110865704309273

Received: 5 March 2003

Published: 7 September 2004

Abstract

Crosstalk is a major problem in modern DSL systems such as VDSL. Many crosstalk cancellation techniques have been proposed to help mitigate crosstalk, but whilst they lead to impressive performance gains, their complexity grows with the square of the number of lines within a binder. In binder groups which can carry up to hundreds of lines, this complexity is outside the scope of current implementation. In this paper, we investigate partial crosstalk cancellation for upstream VDSL. The majority of the detrimental effects of crosstalk are typically limited to a small subset of lines and tones. Furthermore, significant crosstalk is often only seen from neighbouring pairs within the binder configuration. We present a number of algorithms which exploit these properties to reduce the complexity of crosstalk cancellation. These algorithms are shown to achieve the majority of the performance gains of full crosstalk cancellation with significantly reduced run-time complexity.

Keywords and phrases

DSL interference cancellation reduced complexity partial crosstalk cancellation crosstalk selectivity hybrid selection/combining

Authors’ Affiliations

(1)
Department of Electrical Engineering, Katholieke Universiteit Leuven
(2)
Texas Instruments
(3)
Alcatel Bell

Copyright

© Cendrillon et al. 2004