A maximum likelihood detector for nonlinear magnetic recording

Extremely high density magnetic recording is not well modeled by linear superposition. A model for nonlinearities in thick particulate media is described, and a simple maximum likelihood detector to this channel is derived. The authors first review the nonlinear recording model of A. Armstrong et al., (1991) and then describe the architecture of the maximum likelihood sequences estimator for the channel. It is observed that further simplifications to the detector can be made when the channel can be described in terms of partial response signals. Some simulation results obtained for a simple channel model are reviewed