A Near-Optimal Linear Crosstalk Canceler for Upstream VDSL

Cendrillon, Raphael, Ginis, George, Van den Bogaert, Etienne and Moonen, Marc (2006) A Near-Optimal Linear Crosstalk Canceler for Upstream VDSL. IEEE Transactions on Signal Processing, 54 8: 3136-3146.

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Author Cendrillon, Raphael
Ginis, George
Van den Bogaert, Etienne
Moonen, Marc
Title A Near-Optimal Linear Crosstalk Canceler for Upstream VDSL
Journal name IEEE Transactions on Signal Processing   Check publisher's open access policy
ISSN 1053-587X
Publication date 2006-08
Sub-type Article (original research)
DOI 10.1109/TSP.2006.874822
Volume 54
Issue 8
Start page 3136
End page 3146
Total pages 11
Editor Javier Garcia-Frias
Place of publication Piscataway, N.J.
Publisher IEEE
Collection year 2006
Language eng
Subject 291700 Communications Technologies
CX
Abstract Crosstalk is the major source of performance degradation in VDSL. Several crosstalk cancelers have been proposed to address this. Unfortunately, they suffer from error propagation, high complexity, and long latency. This paper presents a simple, linear zero-forcing (ZF) crosstalk canceler. This design has a low complexity and no latency and does not suffer from error propagation. Furthermore, due to the well-conditioned structure of the VDSL channel matrix, the ZF design causes negligible noise enhancement. A lower bound on the performance of the linear ZF canceler is derived. This allows performance to be predicted without explicit knowledge of the crosstalk channels, which simplifies service provisioning considerably. This bound shows that the linear ZF canceler operates close to the single-user bound. Therefore, the linear ZF canceler is a low-complexity, low-latency design with predictable near-optimal performance. The combination of spectral optimization and crosstalk cancellation is also considered. Spectra optimization in a multiaccess channel generally involves a complex optimization problem. Since the linear ZF canceler decouples transmission on each line, the spectrum on each modem can be optimized independently, leading to a significant reduction in complexity.
Keyword crosstalk cancellation
diagonal dominance
digital subscriber lines
DSL
dynamic spectrum management
linear
reduced complexity vectoring
Q-Index Code CX
Additional Notes Citation: Cendrillon, R., Ginis, G., Van Den Bogaert, E., Moonen, M. (2006) A Near-Optimal Linear Crosstalk Canceler for Upstream VDSL IEEE Transactions on Signal Processing 54 (8): 3136-3146. DOI: 10.1109/TSP.2006.874822 Copyright (c) 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Information Technology and Electrical Engineering Publications
 
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Created: Fri, 21 Jul 2006, 10:00:00 EST by Raphael Jean Cendrillon on behalf of School of Information Technol and Elec Engineering