Soft-decision Viterbi decoding scheme and a new reliability metric for 4/6 modulation code in holographic data storage

Yongok Kim, Gyuyeol Kong, Sooyong Choi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A soft-decision Viterbi decoding for a 4/6 modulation code is proposed in a holographic data storage system. Since the previous proposed softdecision Viterbi decoding does not support a higher rate modulation codes than 1/2 rate modulation codes, we propose a new reliability metric to support the 4/6 modulation code. The reliability metric is used to calculate the branch metric on the trellis. For a better coding gain, we find a symbol mapping method for the modulation code which provides a large free distance on the trellis to have the enhanced error correcting capability. Simulation results show that the proposed scheme has about 2 dB coding gains than the conventional soft-decision Viterbi decoding scheme.

Original languageEnglish
Article number08JD09
JournalJapanese journal of applied physics
Volume51
Issue number8 PART 3
DOIs
Publication statusPublished - 2012 Aug 1

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decoding
data storage
Decoding
Modulation
modulation
Data storage equipment
coding
Codes (standards)
simulation

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "A soft-decision Viterbi decoding for a 4/6 modulation code is proposed in a holographic data storage system. Since the previous proposed softdecision Viterbi decoding does not support a higher rate modulation codes than 1/2 rate modulation codes, we propose a new reliability metric to support the 4/6 modulation code. The reliability metric is used to calculate the branch metric on the trellis. For a better coding gain, we find a symbol mapping method for the modulation code which provides a large free distance on the trellis to have the enhanced error correcting capability. Simulation results show that the proposed scheme has about 2 dB coding gains than the conventional soft-decision Viterbi decoding scheme.",
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Soft-decision Viterbi decoding scheme and a new reliability metric for 4/6 modulation code in holographic data storage. / Kim, Yongok; Kong, Gyuyeol; Choi, Sooyong.

In: Japanese journal of applied physics, Vol. 51, No. 8 PART 3, 08JD09, 01.08.2012.

Research output: Contribution to journalArticle

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