Research Article
Spectrum Balancing for DSL with Restrictions on Maximum Transmit PSD
@INPROCEEDINGS{10.1109/ACCESSNETS.2007.4447105, author={Driton Statovci and Tomas Nordstr\o{}m and Rickard Nilsson}, title={Spectrum Balancing for DSL with Restrictions on Maximum Transmit PSD}, proceedings={2nd International ICST Conference on Access Networks}, publisher={IEEE}, proceedings_a={ACCESSNETS}, year={2008}, month={2}, keywords={Bit rate Constraint optimization Convergence DSL Frequency Iterative algorithms Iterative methods Optimization methods Standardization Visualization}, doi={10.1109/ACCESSNETS.2007.4447105} }- Driton Statovci
Tomas Nordström
Rickard Nilsson
Year: 2008
Spectrum Balancing for DSL with Restrictions on Maximum Transmit PSD
ACCESSNETS
IEEE
DOI: 10.1109/ACCESSNETS.2007.4447105
Abstract
The importance of a power spectral density (PSD) mask restriction is often overlooked when optimizing the spectrum usage for multiuser digital subscriber lines (DSL) systems. However, by developing the optimization strategies based only on the PSD constraints (masks) we can tremendously reduce the computation complexity compared to the methods only based on the total power restriction. In this paper we introduce a maskbased spectrum balancing (MSB) algorithm and demonstrate the near optimum performance of this optimization approach. Furthermore, we show that besides standards compliance, PSD restriction is also needed to ensure the convergence of iterative spectrum balancing methods, which use dual decomposition optimization.