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A study of interactive Processing between PRML detection and erasure error correction in perpendicular recording

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5 Author(s)
Nakamura, Y. ; Fac. of Eng., Ehime Univ., Matsuyama, Japan ; Okamoto, Y. ; Osawa, H. ; Muraoka, H.
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In this paper, the interactive processing between a partial-response maximum-likelihood (PRML) channel and a decoder for the Reed-Solomon (RS) code is studied in perpendicular magnetic recording channel. Whereas in conventional systems a run-length-limited (RLL) encoder/decoder is insides the RS encoder/decoder, in this paper, we permute their positions so that the PRML channel and RS decoder can interact. Accordingly, the RS decoder can acquire reliability information from a PRML channel without interruption by the RLL decoder. It is demonstrated by computer simulation that the proposed system provides an SNR improvement of 0.8-1.1 dB compared with a conventional system at a linear density normalized by user bit interval, K, of 1.5.

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Magnetics, IEEE Transactions on  (Volume:40 ,  Issue: 4 )