Computer Simulation Performance of Iterative Water-Filling Algorithm for ADSL2+ and VDSL Mixed System

Abstract

Crosstalk is a major issue in modern ADSL and VDSL systems. Static spectrum management (SSM), the traditional way to guarantee spectrum compatibility, employs spectral masks which can be overly restrictive and result in poor performance. In this paper, fixed margin iterative water-filling algorithm is applied in downstream VDSL and ADSL2+ scenario when they are in the same binder. The algorithm can minimize the transmission power and at the same time the overall high-quality service is guaranteed for all the users of the same binder. The simulation results show that ADSL2+ can realize performance gains by up to 80% compared with SSM techniques or ADSL.