Semi-Blind Power Allocation for Digital Subscriber Lines

Digital subscriber lines (DSL) are today one of the most important means for delivering high-speed data transmission. An emerging technique for dealing with one of the technology's most harmful problems, crosstalk, is dynamic spectrum management (DSM). DSM literature already counts with some ha...

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Bibliographic Details
Published in2008 IEEE International Conference on Communications pp. 1420 - 1425
Main Authors Moraes, R., Dortschy, B., Klautau, A., Riu, J.R.i.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2008
Subjects
Communications Society
Computational efficiency
Crosstalk
Data communication
DSL
Educational Activities Board
Laboratories
Modems
OFDM modulation
Radio spectrum management
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Summary:Digital subscriber lines (DSL) are today one of the most important means for delivering high-speed data transmission. An emerging technique for dealing with one of the technology's most harmful problems, crosstalk, is dynamic spectrum management (DSM). DSM literature already counts with some half a dozen important solutions. These solutions can be classified according to four different aspects: optimality, computational cost, distribution and required crosstalk channel information. In this work we present an algorithm, named semi- blind spectrum balancing, which achieves a compelling trade-off between these four aspects. The scheme is based on the idea of optimization against a virtual line, a fictitious line to represent the damage caused to other users in the network. This line is adjusted with the aid of limited message-passing between modems and a central agent and very simple crosstalk channel information. Crosstalk channel knowledge required should be much simpler to obtain than full channel estimation.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2008.275