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How Vectoring in G.fast May Cause Neighborhood Wars

Medeiros, Eduardo LU ; Magesacher, Thomas LU ; Eriksson, Per-Erik; Lu, Chenguang and Ödling, Per LU (2014) IEEE International Conference on Communications (ICC), 2014 In [Host publication title missing] p.3865-3870
Abstract
Emerging wireline transmission systems such as G.fast use bands up to around 200 MHz on short cables. A key enabler for achieving the aspired throughput of several hundred Mbit/s is joint processing of transmit signals in downstream direction as well as joint processing of receive signals in upstream direction through techniques referred to as vectoring. A new challenge in such systems are sudden and severe changes in the channel matrix caused by changing terminations on lines outside the vectoring group. Such events can be caused by users disconnecting their modems, turning them on or off, or on-/off- hook events on lines that still support the plain old telephony service.

This work presents channel measurements capturing the... (More)
Emerging wireline transmission systems such as G.fast use bands up to around 200 MHz on short cables. A key enabler for achieving the aspired throughput of several hundred Mbit/s is joint processing of transmit signals in downstream direction as well as joint processing of receive signals in upstream direction through techniques referred to as vectoring. A new challenge in such systems are sudden and severe changes in the channel matrix caused by changing terminations on lines outside the vectoring group. Such events can be caused by users disconnecting their modems, turning them on or off, or on-/off- hook events on lines that still support the plain old telephony service.

This work presents channel measurements capturing the impact of termination changes caused by modems or handsets. An analysis of the impact of these sudden changes on the signal- to-noise-power-ratio in vectoring systems reveals that throughput and stability can be seriously degraded. The potential of decision- directed channel tracking based on least squares estimation is investigated. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
G.fast, Vectoring, DSL, channel tracking
in
[Host publication title missing]
editor
Jamalipour, Abbas and Deng, Der-Jiunn
pages
6 pages
conference name
IEEE International Conference on Communications (ICC), 2014
external identifiers
  • Scopus:84907000377
ISBN
978-1-4799-2003-7
DOI
10.1109/ICC.2014.6883923
language
English
LU publication?
yes
id
ef1d9a3c-7fd1-4b55-a511-e49af878c8c8 (old id 4679165)
date added to LUP
2015-01-15 13:57:57
date last changed
2016-10-13 04:59:25
@misc{ef1d9a3c-7fd1-4b55-a511-e49af878c8c8,
  abstract     = {Emerging wireline transmission systems such as G.fast use bands up to around 200 MHz on short cables. A key enabler for achieving the aspired throughput of several hundred Mbit/s is joint processing of transmit signals in downstream direction as well as joint processing of receive signals in upstream direction through techniques referred to as vectoring. A new challenge in such systems are sudden and severe changes in the channel matrix caused by changing terminations on lines outside the vectoring group. Such events can be caused by users disconnecting their modems, turning them on or off, or on-/off- hook events on lines that still support the plain old telephony service.<br/><br>
This work presents channel measurements capturing the impact of termination changes caused by modems or handsets. An analysis of the impact of these sudden changes on the signal- to-noise-power-ratio in vectoring systems reveals that throughput and stability can be seriously degraded. The potential of decision- directed channel tracking based on least squares estimation is investigated.},
  author       = {Medeiros, Eduardo and Magesacher, Thomas and Eriksson, Per-Erik and Lu, Chenguang and Ödling, Per},
  editor       = {Jamalipour, Abbas and Deng, Der-Jiunn},
  isbn         = {978-1-4799-2003-7},
  keyword      = {G.fast,Vectoring,DSL,channel tracking},
  language     = {eng},
  pages        = {3865--3870},
  series       = {[Host publication title missing]},
  title        = {How Vectoring in G.fast May Cause Neighborhood Wars},
  url          = {http://dx.doi.org/10.1109/ICC.2014.6883923},
  year         = {2014},
}