How Vectoring in G.fast May Cause Neighborhood Wars

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceeding

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 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.

Detaljer

Författare
  • Eduardo Medeiros
  • Thomas Magesacher
  • Per-Erik Eriksson
  • Chenguang Lu
  • Per Ödling
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Elektroteknik och elektronik

Nyckelord

Originalspråkengelska
Titel på värdpublikation[Host publication title missing]
RedaktörerAbbas Jamalipour, Der-Jiunn Deng
Sidor3865-3870
Antal sidor6
StatusPublished - 2014
PublikationskategoriForskning
Peer review utfördJa
EvenemangIEEE International Conference on Communications (ICC), 2014 - Sydney, Sydney, Australien
Varaktighet: 2014 jun 102014 jun 14

Konferens

KonferensIEEE International Conference on Communications (ICC), 2014
LandAustralien
OrtSydney
Period2014/06/102014/06/14