Semi-Blind Power Allocation for Digital Subscriber Lines

Summary, in English

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.

• Author: Rodrigo Moraes; Boris Dortschy; Aldebaro Klautau; Jaume Rius i Riu
• Publishing year: 2008
• Language: English
• Publication/Series: 2008 IEEE International Conference on Communications
• Links: http://dx.doi.org/10.1109/ICC.2008.275
• Document type: Conference paper
• Publisher: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Topic: Electrical Engineering, Electronic Engineering, Information Engineering
• Conference name: IEEE International Conference on Communications ICC 2008
• Conference date: 2008-05-19 - 2008-05-23
• Conference place: Beijing, China
• Status: Published
• Research group: Broadband Communication