Parametric Spectrum Shaping for Downstream Spectrum Management of Digital Subscriber Lines

The performance of Digital Subscriber Line (DSL) systems is tightly dependent on network deployment. The users (lines) in the binder create mutual interference, thus decreasing the rates of all users. The Optimal Spectrum Balancing (OSB) algorithm solves the spectrum management problem to increase user rates. However, the computational complexity of the OSB algorithm is extremely high. In this paper we introduce a novel low-complexity sub-optimal algorithm, dubbed PArametric Spectrum Shaping (PASS). The complexity of the suggested algorithm is independent of the number of tones. Simulation results show that the PASS algorithm matches OSB performance in many typical DSL scenarios.