Error correcting capable 2/4 modulation code using trellis coded modulation in holographic data storage

Yongok Kim, Gyuyeol Kong, Sooyong Choi

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2 Citations (Scopus)

Abstract

An error correcting capable 2/4 modulation code scheme is proposed in holographic data storage (HDS) systems. We adopt trellis coded modulation (TCM) to obtain a good error correcting capability without loss of data rate in the HDS systems. To overcome loss of a data rate caused by a 1/2-rate convolutional code, we extend a 2/4 modulation code set the 3/4 modulation code set as high-order modulation in the proposed scheme. Additionally, we find an optimal mapping method of index numbers to maximize the free distance on the trellis and calculate the free distance according to each constraint length. The simulation results show that the proposed scheme with the same data rate has about 4 dB coding gains compared to the conventional 2/4 modulation coding scheme.

Original languageEnglish
Article number08JD08
JournalJapanese journal of applied physics
Volume51
Issue number8 PART 3
DOIs
Publication statusPublished - 2012 Aug 1

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All Science Journal Classification (ASJC) codes

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

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