Reducing Impulsive Noise n DSL Systems:Robustness and Delay

FERNANDO GREGORIO; JUAN EDMUNDO COUSSEAU; JOSE LUIS FIGUEROA

Espoo

Simposio; 6th. Nordic Signal Processing Symposium; 2004

norsig

A canonical piecewise linear filter (CPWL) realization is proposed as part of the scheme for nonlinear time-domain equalization (TEQ) aiming impulsive noise interference reduction in xDSL transmission systems. The resulting structure is discussed in the context of a VDSL system using Reed-Solomon (RS) coding and interleaver to prevent impulsive noise effects. Also, a recently introduced impulsive noise model is used in order to evaluate the new methodology. The results are compared evaluating the performance of the new structure with different impulsive noise sample and different interleavers deep. The delay, for a free error system, in the new design and the linear design are compared to show the improvement obtained using the CPWL structure.