Optimal multiuser spectrum management for digital subscriber lines

R. Cendrillon, M. Moonen, J. Verlinden, T. Bostoen, W. Yu
2004 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577)  
Crosstalk is a major issue in modern DSL systems such as ADSL and VDSL. Static spectrum management, the traditional way of ensuring spectral compatibility, employs spectral masks which can be overly conservative and lead to poor performance. In this paper we present a centralized algorithm for optimal spectrum management (OSM) in DSL. The algorithm uses a dual decomposition to solve the spectrum management problem in an efficient and computationally tractable way. The algorithm shows
more » ... performance gains over existing DSM techniques, e.g. in a downstream ADSL scenario the centralized OSM algorithm can outperform a distributed DSM algorithm such as iterative waterfilling by up to 135% This work was carried out in the frame of IUAP P5/22, Dynamical Systems and Control: Computation, Identification and Modelling and P5/11, Mobile multimedia communication systems and networks; the Concerted Research Action GOA-MEFISTO-666, Mathematical Engineering for Information and Communication Systems Technology; IWT SOLIDT Project, Solutions for xDSL Interoperability, Deployment and New Technologies; FWO Project G.0196.02, Design of efficient communication techniques for wireless timedispersive multi-user MIMO systems and was partially sponsored by Alcatel-Bell.
doi:10.1109/icc.2004.1312441 dblp:conf/icc/CendrillonMVBY04 fatcat:egzwxgrszffv7max4e7ozekthm