Alien Crosstalk Cancellation for Multipair Digital Subscriber Line Systems

Autor: Ginis George, Peng Chia-Ning
Jazyk: angličtina
Rok vydání: 2006
Předmět:
Zdroj: EURASIP Journal on Advances in Signal Processing, Vol 2006, Iss 1, p 016828 (2006)
Druh dokumentu: article
ISSN: 1687-6172
1687-6180
DOI: 10.1155/ASP/2006/16828
Popis: An overview of alien crosstalk cancellation for DSL systems with multiple pairs is here presented. It is shown that when a common crosstalk source affects the receivers of multiple pairs, the noise exhibits a certain correlation among the pairs. In a DMT system, the frequency-domain noise samples are most strongly correlated between pairs when they correspond to the same tone. Thus, noise decorrelation algorithms applied independently for each tone can provide significant performance enhancements. Three possible methods are described for noise decorrelation, one is suitable for two-sided coordination and two are suited for receiver coordination among the pairs. It is theoretically proven that the data-rate performance of these three methods is identical from the perspective of the sum rate over all pairs. Simulation results corresponding to an ADSL2+ two-pair system with a T1 disturber are presented to illustrate the noise correlation property and to indicate the potential performance benefits.
Databáze: Directory of Open Access Journals
Externí odkaz: