Performance of a d=0 Demod/Remod detector with partial erasure matching

This paper describes the bit-error-rate (BER) performance of a Demod/Remod detector matched to a magnetic recording playback signal with partial erasure (PE) having d=0 run-length-limited (RLL) coded data. Previous work on Viterbi detection with PE is extended by the discovery of a 10-state detector and by generalizing the technique to an EPR4 partial-response target. A Demod/Remod detector is described which approximates the EPR4/PE detector with lower complexity. BER performance results are given for this detector on data taken from a commercially available magnetic disk drive.