Modified maximum likelihood sequence estimation in a simple partial erasure model

A simple partial erasure model caused by the effective reduction of a transition width in a magnetic recording system is presented. This model predicts the nonlinear distortion accurately at high recording densities. This paper proposes the modified maximum-likelihood sequence detector (MLSD) incorporating this nonlinear model. Simulation shows that the modified maximum likelihood sequence detector outperforms the normal Viterbi detection in a nonlinearity-dominant channel.<<ETX>>