A study on iterative decoding with LLR modulator by parity check information in SMR system

M. Nishikawa, Y. Nakamura, H. Osawa, Y. Okamoto, Y. Kanai, H. Muraoka

研究成果: Article査読

1 被引用数 (Scopus)

抄録

In recent years, shingled magnetic recording (SMR) has attracted attention as a new recording system of the hard disk drives. Although SMR can realize narrow track by overwriting data track like tile roofing, it has remarkable performance deterioration due to the influence of inter-track interference. Therefore, the performance improvement of the low-density parity-check (LDPC) coding and iterative decoding system using the sum-product decoding is required. In this paper, we propose the LDPC encoding and iterative decoding system with the log-likelihood ratio modulator and show the error floor is eliminated and improvement of signal-to-noise ratio to achieve the error free is obtained in the SMR under an areal recording density of 4 Tbits/in2 specification for the channel bit sequence coded by run-length limited and LDPC encoders by computer simulation. Therefore, the channel bit is composed bit about five magnetic grains.

本文言語English
論文番号8369398
ジャーナルIEEE Transactions on Magnetics
54
11
DOI
出版ステータスPublished - 2018 11月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 電子工学および電気工学

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