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

Francisco Müller, Chenguang Lu, Per-Erik Eriksson, Stefan Höst, Aldebaro Klautau

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceedingPeer review


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.
Titel på värdpublikation2014 IEEE International Conference on Communications, ICC 2014
FörlagIEEE - Institute of Electrical and Electronics Engineers Inc.
ISBN (tryckt)9781479920037
StatusPublished - 2014
EvenemangIEEE ICC 2014 - Selected Areas in Communications Symposium - Sydney, Australien
Varaktighet: 2014 juni 102014 juni 14


KonferensIEEE ICC 2014 - Selected Areas in Communications Symposium

Ämnesklassifikation (UKÄ)

  • Elektroteknik och elektronik


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