GENp1-3: Detection and Decoding Schemes of Burst Erasures in Perpendicular Magnetic Recording Channel

In practical magnetic recording channel, burst erasures occur in addition to random error. It is well known that burst erasures are caused by thermal asperity (TA) and media defect (MD). In this paper, the detection scheme of the position of burst erasures is proposed. Proposed scheme utilizes the power monitoring of the read signal after equalization and calculates the erasure position and the erasure length. We show that the sequence estimation with Viterbi algorithm using this burst erasure position and burst erasure depth as channel state information (CSI) outperforms the conventional scheme in perpendicular magnetic recording channels. Furthermore, we studied joint design schemes with error correcting code (ECC).