Crosstalk identification in xDSL systems

摘要: Crosstalk among telephone lines in the same or neighboring bundles is a major impairment current xDSL systems. This paper proposes novel idea of an impartial third party that identifies crosstalk coupling functions twisted pairs these The identification technique includes following four procedures: (1) transmitted and received signals from each DSL modem for predefined time period are collected sent to party; (2) resampled according clock rate receiver interest; (3) signals' timing differences estimated by cross correlation; (4) using least-squares method. performance correlation methods analyzed determine amount data needed identification. Simulation results show proposed can identify accurately consistent with theoretical analysis. These identified be used significantly improve (e.g., multiuser detection) facilitate provisioning, maintenance, diagnosis