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

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2 Citations (Scopus)


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
Issue number8 PART 3
Publication statusPublished - 2012 Aug 1


All Science Journal Classification (ASJC) codes

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

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