Performance of BCJR-DFE based detectors over recording channels using pattern-dependent noise prediction

In this paper, we study the performance of BCJR-DFE receiver over media noise dominated recording channels by integrating pattern-dependent noise prediction into the receiver. It is well known that as recording density increases, media noise becomes the primary system impairment source instead of electronics noise. Receivers based on PDNP technique employ different noise whitening filters for different data patterns and are able to provide significant, signal-to-noise (SNR) gains for media noise dominated channel over conventional detectors, which ignore the pattern dependence of noise. The structure of BCJR-DFE receiver embedded with PDNP is described and its performance over perpendicular recording channels was studied.