Adaptive NLMS Partial Crosstalk Cancellation in Digital Subscriber Lines

Homer, J. P., Gujrathi, M. L., Cendrillon, R. J., Clarkson, I. V. L. and Moonen, M. (2006). Adaptive NLMS Partial Crosstalk Cancellation in Digital Subscriber Lines. In: V. E. Debrunner, Fortieth Asilomar Conference on Signals, Systems and Computers. Asilomar Conference of Signals, Systems and Computers, Asilomar Conference Grounds, Monterey, California, (1385-1389). 29 October - 1 November, 2006.

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Author Homer, J. P.
Gujrathi, M. L.
Cendrillon, R. J.
Clarkson, I. V. L.
Moonen, M.
Title of paper Adaptive NLMS Partial Crosstalk Cancellation in Digital Subscriber Lines
Conference name Asilomar Conference of Signals, Systems and Computers
Conference location Asilomar Conference Grounds, Monterey, California
Conference dates 29 October - 1 November, 2006
Proceedings title Fortieth Asilomar Conference on Signals, Systems and Computers   Check publisher's open access policy
Journal name 2006 Fortieth Asilomar Conference on Signals, Systems and Computers, Vols 1-5   Check publisher's open access policy
Place of Publication USA
Publisher IEEE
Publication Year 2006
Sub-type Fully published paper
ISBN 1-4244-0785-0
ISSN 1058-6393
Editor V. E. Debrunner
Volume 1
Start page 1385
End page 1389
Total pages 5
Collection year 2006
Language eng
Abstract/Summary Crosstalk is a major limitation to achieving high data-rates in next generation VDSL systems. Whilst crosstalk cancellation can be applied to completely remove crosstalk, it is often too complex for application in typical VDSL binders, which can contain up to hundreds of lines. A practical alternative, known as partial cancellation limits the cancellation to crosstalkers that cause severe interference to the other lines within the binder. In real VDSL systems, the crosstalk environment changes rapidly as new lines come online; old lines go offline, and the crosstalk channels change with fluctuations in ambient temperature. Therefore, adaptive crosstalk cancellers are often required. In this paper, we propose a new detection guided adaptive NLMS method for Adaptive Partial Crosstalk Cancellation that detects significant crosstalkers and tracks variations in their crosstalk channels. This exploits the sparse and column-wise diagonal dominant properties of the crosstalk channel matrix and leads to fast convergence, accurate crosstalk channel tracking, with a lower update complexity. The end result is an adaptive Partial Crosstalk Cancellation algorithm that has lower run-time complexity than prior state-of-the-art whilst yielding comparatively high data-rates and reliable service.
Subjects 291799 Communications Technologies not elsewhere classified
E1
700300 Communication Services
291706 Broadband Network Technology
Keyword DSL
upstream
crosstalk
normalized least mean squares
decision feedback canceller
recursive least squares
Q-Index Code E1

 
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Created: Mon, 27 Nov 2006, 10:00:00 EST by Mandar Gujrathi on behalf of School of Information Technol and Elec Engineering