Target design and low complexity signal detection for two-dimensional magnetic recording

Partial response maximum likelihood (PRML) scheme is a well known technique to equalize the data read from ID magnetic recording channels. The PRML scheme uses a linear equalizer followed by a maximum likelihood (ML) detector. This paper is novel in addressing the following aspects: a) We propose two different methods to design separable and non-separable 2D PR targets that help in signal detection, b) We propose an extension of ID Viterbi detector for signal detection in 2D ISI channels. We use the detector to study the efficacy of PR targets designed for a particular choice of 2D ISI channel.