Iterative Water-Filling for Digital Subscriber Lines

Digital Subscriber Lines (DSL) technology are of great importance nowadays especially due to the demand for higher speeds in Internet access. New spectrum management techniques are under study today so the binder environment can be coordinated and hence more cleverly used. These new techniques are called Dynamic Spectrum Management (DSM). This paper analyzes the first level of DSM coordination, in which power control is performed in a distributed and autonomous fashion by each modem. More specifically, this work concerns the Iterative Water-Filling algorithm, which has been shown to considerably improve the performance of DSL systems.