Effective two-dimensional partial response maximum likelihood detection scheme for holographic data storage systems

Gyuyeol Kong, Sooyong Choi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An effective two-dimensional (2D) partial response maximum likelihood (PRML) detection scheme for holographic data storage (HDS) systems is proposed. The proposed scheme adopts the simplified trellis diagram, uses a priori information, and detects the data in two directions from the previously proposed detection schemes. The simplified trellis diagram which has 4 states and 8 branches yields a dramatic complexity reduction while the simplified 2D PRML detector shows serious performance degradation in the high density HDS channels. To prevent performance degradation, the proposed detector uses a priori information in order to give higher reliability to the branch metric. Furthermore, the proposed scheme detects the data in the vertical and horizontal directions to fully utilize the characteristics of the channel detection with a 2D partial response target. By effective combination of these three techniques, the proposed scheme with a simple structure has more than 2 dB gains compared to the conventional detection schemes.

Original languageEnglish
Article number08JB06
JournalJapanese Journal of Applied Physics
Volume51
Issue number8 PART 3
DOIs
Publication statusPublished - 2012 Aug 1

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data storage
Maximum likelihood
Detectors
Data storage equipment
Degradation
diagrams
degradation
detectors

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "An effective two-dimensional (2D) partial response maximum likelihood (PRML) detection scheme for holographic data storage (HDS) systems is proposed. The proposed scheme adopts the simplified trellis diagram, uses a priori information, and detects the data in two directions from the previously proposed detection schemes. The simplified trellis diagram which has 4 states and 8 branches yields a dramatic complexity reduction while the simplified 2D PRML detector shows serious performance degradation in the high density HDS channels. To prevent performance degradation, the proposed detector uses a priori information in order to give higher reliability to the branch metric. Furthermore, the proposed scheme detects the data in the vertical and horizontal directions to fully utilize the characteristics of the channel detection with a 2D partial response target. By effective combination of these three techniques, the proposed scheme with a simple structure has more than 2 dB gains compared to the conventional detection schemes.",
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Effective two-dimensional partial response maximum likelihood detection scheme for holographic data storage systems. / Kong, Gyuyeol; Choi, Sooyong.

In: Japanese Journal of Applied Physics, Vol. 51, No. 8 PART 3, 08JB06, 01.08.2012.

Research output: Contribution to journalArticle

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