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

Yongok Kim, Gyuyeol Kong, Sooyong Choi

Research output: Contribution to journalArticle

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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Trellis codes
data storage
Modulation
modulation
Data storage equipment
coding
Convolutional codes

All Science Journal Classification (ASJC) codes

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

Cite this

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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.",
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Error correcting capable 2/4 modulation code using trellis coded modulation in holographic data storage. / Kim, Yongok; Kong, Gyuyeol; Choi, Sooyong.

In: Japanese journal of applied physics, Vol. 51, No. 8 PART 3, 08JD08, 01.08.2012.

Research output: Contribution to journalArticle

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