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Advanced Signal Processing for Digital Subscriber Lines EURASIP Journal on Applied Signal Processing Advanced Signal Processing for Digital Subscriber Lines Guest Editors: Raphael Cendrillon, Iain Collings, Tomas Nordström, Frank Sjöberg, Michail Tsatsanis, and Wei Yu EURASIP Journal on Applied Signal Processing Advanced Signal Processing for Digital Subscriber Lines EURASIP Journal on Applied Signal Processing Advanced Signal Processing for Digital Subscriber Lines Guest Editors: Raphael Cendrillon, Iain Collings, Tomas Nordström, Frank Sjöberg, Michail Tsatsanis, and Wei Yu Copyright © 2006 Hindawi Publishing Corporation. All rights reserved. This is a special issue published in volume 2006 of “EURASIP Journal on Applied Signal Processing.” All articles are open access articles distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Editor-in-Chief Ali H. Sayed, University of California, USA Associate Editors Kenneth Barner, USA Søren Holdt Jensen, Denmark Vitor H. Nascimento, Brazil Mauro Barni, Italy Mark Kahrs, USA Sven Nordholm , Australia Richard Barton, USA Thomas Kaiser, Germany Douglas O’Shaughnessy, Canada Ati Baskurt, France Moon Gi Kang, South Korea Montse Pardas, Spain Kostas Berberidis, Greece Matti Karjalainen, Finland Wilfried Philips, Belgium Jose C. Bermudez, Brazil Walter Kellermann, Germany Vincent Poor, USA Enis Cetin, Turkey Joerg Kliewer, USA Ioannis Psaromiligkos, Canada Jonathon Chambers, UK Lisimachos P. Kondi, USA Phillip Regalia, France Benoit Champagne, Canada Alex Kot, Singapore Markus Rupp, Austria Joe Chen, USA Vikram Krishnamurthy, Canada Bill Sandham, UK Liang-Gee Chen, Taiwan Tan Lee, Hong Kong Bulent Sankur, Turkey Huaiyu Dai, USA Geert Leus, The Netherlands Erchin Serpedin, USA Satya Dharanipragada, USA Bernard C. Levy, USA Dirk Slock, France Frank Ehlers, Italy Ta-Hsin Li, USA Yap-Peng Tan, Singapore Sharon Gannot, Israel Mark Liao, Taiwan Dimitrios Tzovaras, Greece Fulvio Gini, Italy Yuan-Pei Lin, Taiwan Hugo Van hamme, Belgium Irene Gu, Sweden Shoji Makino, Japan Bernhard Wess, Austria Peter Handel, Sweden Stephen Marshall, UK Douglas Williams, USA R. Heusdens, The Netherlands C. Mecklenbräuker, Austria Roger Woods, UK Ulrich Heute, Germany Gloria Menegaz, Italy Jar-Ferr Yang, Taiwan Arden Huang, USA Ricardo Merched, Brazil Abdelhak M. Zoubir, Germany Jiri Jan, Czech Republic Rafael Molina, Spain Sudharman K. Jayaweera, USA Marc Moonen, Belgium Contents Advanced Signal Processing for Digital Subscriber Lines, Raphael Cendrillon, Iain Collings, Tomas Nordström, Frank Sjöberg, Michail Tsatsanis, and Wei Yu Volume 2006 (2006), Article ID 32476, 3 pages The Worst-Case Interference in DSL Systems Employing Dynamic Spectrum Management, Mark H. Brady and John M. Cioffi Volume 2006 (2006), Article ID 78524, 11 pages Joint Multiuser Detection and Optimal Spectrum Balancing for Digital Subscriber Lines, Vincent M. K. Chan and Wei Yu Volume 2006 (2006), Article ID 80941, 13 pages Spectrally Compatible Iterative Water Filling, Jan Verlinden, Etienne Van den Bogaert, Tom Bostoen, Francesca Zanier, Marco Luise, Raphael Cendrillon, and Marc Moonen Volume 2006 (2006), Article ID 58380, 10 pages The Normalized-Rate Iterative Algorithm: A Practical Dynamic Spectrum Management Method for DSL, Driton Statovci, Tomas Nordström, and Rickard Nilsson Volume 2006 (2006), Article ID 95175, 17 pages ADSL Transceivers Applying DSM and Their Nonstationary Noise Robustness, Etienne Van den Bogaert, Tom Bostoen, Jan Verlinden, Raphael Cendrillon, and Marc Moonen Volume 2006 (2006), Article ID 67686, 8 pages Analysis of Iterative Waterfilling Algorithm for Multiuser Power Control in Digital Subscriber Lines, Zhi-Quan Luo and Jong-Shi Pang Volume 2006 (2006), Article ID 24012, 10 pages Alien Crosstalk Cancellation for Multipair Digital Subscriber Line Systems, George Ginis and Chia-Ning Peng Volume 2006 (2006), Article ID 16828, 12 pages Crosstalk Models for Short VDSL2 Lines from Measured 30 MHz Data, E. Karipidis, N. Sidiropoulos, A. Leshem, Li Youming, R. Tarafi, and M. Ouzzif Volume 2006 (2006), Article ID 85859, 9 pages Error Sign Feedback as an Alternative to Pilots for the Tracking of FEXT Transfer Functions in Downstream VDSL, J. Louveaux and A.-J. van der Veen Volume 2006 (2006), Article ID 94105, 14 pages Iterative Refinement Methods for Time-Domain Equalizer Design, Güner Arslan, Biao Lu, Lloyd D. Clark, and Brian L. Evans Volume 2006 (2006), Article ID 43154, 12 pages Near-Capacity Coding for Discrete Multitone Systems with Impulse Noise, Masoud Ardakani, Frank R. Kschischang, and Wei Yu Volume 2006 (2006), Article ID 98738, 10 pages Fine-Granularity Loading Schemes Using Adaptive Reed-Solomon Coding for xDSL-DMT Systems, Saswat Panigrahi and Tho Le-Ngoc Volume 2006 (2006), Article ID 65716, 13 pages Intra-Symbol Windowing for Egress Reduction in DMT Transmitters, Gert Cuypers, Koen Vanbleu, Geert Ysebaert, and Marc Moonen Volume 2006 (2006), Article ID 70387, 9 pages Designing Tone Reservation PAR Reduction, Niklas Andgart, Per Ödling, Albin Johansson, and Per Ola Börjesson Volume 2006 (2006), Article ID 38237, 14 pages Cosine-Modulated Multitone for Very-High-Speed Digital Subscriber Lines, Lekun Lin and Behrouz Farhang-Boroujeny Volume 2006 (2006), Article ID 19329, 16 pages Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006, Article ID 32476, Pages 1–3 DOI 10.1155/ASP/2006/32476 Editorial Advanced Signal Processing for Digital Subscriber Lines Raphael Cendrillon,1 Iain Collings,2 Tomas Nordstrom,¨ 3 Frank Sjoberg,¨ 4 Michail Tsatsanis,5 and Wei Yu6 1 Marvell Hong Kong Ltd., Hong Kong 2 CSIRO Information Communication Technologies Center, Australia 3 Telecommunications Research Center Vienna (ftw.), Donau-City-StraBe 1, 1220 Vienna, Austria 4 Division of Signal Processing, Lulea˚ University of Technology, and Upzide Labs, Lulea,˚ Sweden 5 Aktino Inc., Irvine, California, USA 6 Electrical and Computer Engineering Department, University of Toronto, 10 King’s College Road, Toronto, ON Canada, M5S 3G4 Received 27 January 2006; Accepted 27 January 2006 Copyright © 2006 Raphael Cendrillon et al. 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. The recent deployment of digital subscriber line (DSL) tech- systems by adaptively varying transmit power-spectral den- nology around the world is rapidly making broadband access sity according to geographic locations and the crosstalk chan- for the mass consumer market a reality. The ever-growing nel characteristics of the subscribers in each bundle. This is- customer demand for higher data rates has been fueled by sue contains six papers on DSM. In “The worst-case inter- the popularity of applications like peer-to-peer (P2P) file- ference in DSL systems employing dynamic spectral man- sharing networks and video-streaming and high-definition agement,” Brady and Cioffi answer the question of what the television (HDTV). DSL technology allows telephone opera- worst-case crosstalk interference is for a given DSL line. They tors to get maximum leverage out of their existing infrastruc- characterize the performance of the system under the worst- ture by delivering broadband access over existing twisted- case noise using a game theory technique. In “Joint mul- pair telephone lines. At the heart of DSL lies a plethora of tiuser detection and optimal spectrum balancing for digital signal processing techniques which enable such high-speed subscriber lines,” Chan and Yu study the optimal spectrum transmission to be achieved over a medium originally de- management technique for a scenario in which crosstalk signed with only voice-band transmission in mind. These may also be partially cancelled using advanced crosstalk advanced signal processing techniques address many chal- cancellation techniques. In the next three papers, practi- lenges that exist in DSL networks today, such as the near-end cal spectrum management techniques are investigated. In and far-end crosstalk (NEXT/FEXT), impulse noise, peak-to- “Spectrally compatible iterative water-filling,” Verlinden et average-power ratio (PAR), intersymbol and intercarrier in- al. study a system in which spectral allocation scheme is terference (ISI/ICI), radio-frequency interference (RFI), and constrained by additional spectrum compatibility require- so forth. The goal of this special issue is to discuss the state- ments and propose a new scheme based on an earlier al- of-the-art and recent advances in signal processing tech- gorithm called iterative water-filling. In “The normalized- niques for DSL. rate iterative algorithm: a practical dynamic spectrum man- The special issue consists of fifteen papers on a range of agement method for DSL,” Statovci et al. propose a new topics. The first set of papers focuses on the area of dynamic low-complexity technique for spectrum balancing and fre- spectrum management (DSM). In a conventional DSL de- quency partition in a DSL bundle. In “ADSL transceivers ployment, the transmit spectrum for all modems in a bun- applying DSM and their nonstationary noise robustness,” dle are fixed to a predetermined level. As DSL deployment Van den Bogaert et al. report the performance of practical becomes increasingly heterogeneous, crosstalk produced by transceivers implementing dynamic spectrum management modems under a fixed spectrum can
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