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 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 semiblind 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...

• Type: Conference
• Year: 2008
• Where: ICC
• Authors: Rodrigo Moraes, Boris Dortschy, Aldebaro Klautau, Jaume Rius i Riu
• Keywords: Communications, Crosstalk Channel, Crosstalk Channel Information, Crosstalk Channel Knowledge, ICC 2008