Patent ID: 6600794
Filing Date: 2003-07-29
Classification: G11B,H04L

Abstract:
A method for performing Maximum Likelihood Sequence Estimation (MLSE) on a received signal that is affected by non-linear distortion, characterized by the step of producing a cleaned signal by removing non-linear inter-symbol-interference (ISI) through a non-linear Volterra canceller which is a simplified structure with respect to a Volterra Equalizer, and which only processes the non-linear distortion, followed by applying a Viterbi Detector which processes this cleaned signal in the manner of a linear signal, and which estimates appropriate metrics accordingly, said method further comprising adaptively controlling coefficients of at least one of the non-linear Volterra canceller and a matched filter, said adaptively controlling comprising iteratively updating said coefficients in accordance with an iterative updating algorithm.