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Optimizing Power Normalization for G.fast Linear Precoder by Linear Programming

Müller, Francisco; Lu, Chenguang; Eriksson, Per-Erik; Höst, Stefan LU and Klautau, Aldebaro (2014) IEEE ICC 2014 - Selected Areas in Communications Symposium In 2014 IEEE International Conference on Communications, ICC 2014 p.4060-4065
Abstract
The use of vectoring for crosstalk cancellation in

the new ITU-T G.fast standard for next generation DSL systems

becomes essential for efficient utilization of the extended

bandwidth (up to 200 MHz). In VDSL2 (up to 30 MHz),

a zero-forcing-based linear precoder is used in downstream

which approaches single-line performance. However, at high

frequencies, the linear precoder may amplify the signal power

substantially since the crosstalk channel is much stronger

than at lower frequencies. Performance could be significantly

degraded by power normalization to keep the PSD below the

mask. In this work, we extended a per-line power normalization

... (More)
The use of vectoring for crosstalk cancellation in

the new ITU-T G.fast standard for next generation DSL systems

becomes essential for efficient utilization of the extended

bandwidth (up to 200 MHz). In VDSL2 (up to 30 MHz),

a zero-forcing-based linear precoder is used in downstream

which approaches single-line performance. However, at high

frequencies, the linear precoder may amplify the signal power

substantially since the crosstalk channel is much stronger

than at lower frequencies. Performance could be significantly

degraded by power normalization to keep the PSD below the

mask. In this work, we extended a per-line power normalization

scheme by linear programming (LP) optimization. By

simulations using measured cable data it is shown how the LPbased

scheme further improves the linear precoder and it is

also capable of balancing the data rate between lines. Further,

the simulations also show the non-linear Tomlinson-Harashima

precoder performs better than the linear precoders. (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
in
2014 IEEE International Conference on Communications, ICC 2014
pages
4060 - 4065
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE ICC 2014 - Selected Areas in Communications Symposium
external identifiers
  • scopus:84907001013
ISBN
9781479920037
DOI
10.1109/ICC.2014.6883973
language
English
LU publication?
yes
id
8063d8ef-262a-49c5-8880-102012187442 (old id 4450586)
date added to LUP
2014-05-27 12:58:26
date last changed
2017-10-01 05:17:36
@inproceedings{8063d8ef-262a-49c5-8880-102012187442,
  abstract     = {The use of vectoring for crosstalk cancellation in<br/><br>
the new ITU-T G.fast standard for next generation DSL systems<br/><br>
becomes essential for efficient utilization of the extended<br/><br>
bandwidth (up to 200 MHz). In VDSL2 (up to 30 MHz),<br/><br>
a zero-forcing-based linear precoder is used in downstream<br/><br>
which approaches single-line performance. However, at high<br/><br>
frequencies, the linear precoder may amplify the signal power<br/><br>
substantially since the crosstalk channel is much stronger<br/><br>
than at lower frequencies. Performance could be significantly<br/><br>
degraded by power normalization to keep the PSD below the<br/><br>
mask. In this work, we extended a per-line power normalization<br/><br>
scheme by linear programming (LP) optimization. By<br/><br>
simulations using measured cable data it is shown how the LPbased<br/><br>
scheme further improves the linear precoder and it is<br/><br>
also capable of balancing the data rate between lines. Further,<br/><br>
the simulations also show the non-linear Tomlinson-Harashima<br/><br>
precoder performs better than the linear precoders.},
  author       = {Müller, Francisco and Lu, Chenguang and Eriksson, Per-Erik and Höst, Stefan and Klautau, Aldebaro},
  booktitle    = {2014 IEEE International Conference on Communications, ICC 2014},
  isbn         = {9781479920037},
  language     = {eng},
  pages        = {4060--4065},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Optimizing Power Normalization for G.fast Linear Precoder by Linear Programming},
  url          = {http://dx.doi.org/10.1109/ICC.2014.6883973},
  year         = {2014},
}