Optimizing Power Normalization for G.fast Linear Precoder by Linear Programming
Författare
Summary, in English
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.
Publiceringsår
2014
Språk
Engelska
Sidor
4060-4065
Publikation/Tidskrift/Serie
2014 IEEE International Conference on Communications, ICC 2014
Dokumenttyp
Konferensbidrag
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Conference name
IEEE ICC 2014 - Selected Areas in Communications Symposium
Conference date
2014-06-10 - 2014-06-14
Conference place
Sydney, Australia
Aktiv
Published
ISBN/ISSN/Övrigt
- ISBN: 9781479920037