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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 18, Iss. 1 — Jan. 1, 2001
  • pp: 185–194

Soft-decision array decoding for volume holographic memory systems

Wu-chun Chou and Mark A. Neifeld  »View Author Affiliations


JOSA A, Vol. 18, Issue 1, pp. 185-194 (2001)
http://dx.doi.org/10.1364/JOSAA.18.000185


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Abstract

We study the use of soft-decision array decoding in a volume holographic memory (VHM) system that is corrupted by interpixel interference (IPI) and detector noise. Soft-decision methods can unify equalization and error decoding. A highly parallel array decoder is presented in the context of two-dimensional low-pass channel mitigation and error correction. The new decoding algorithm is motivated by iterative turbo-decoding methods and is capable of incorporating a priori knowledge of the corrupting IPI channel during decoding. The resulting joint detection decoding algorithm is shown to offer VHM capacity and density performance superior to that of hard-decision n=255 Reed–Solomon codes in concatenation with a Wiener filter.

© 2001 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(200.3050) Optics in computing : Information processing
(210.2860) Optical data storage : Holographic and volume memories

History
Original Manuscript: December 10, 1999
Revised Manuscript: June 15, 2000
Manuscript Accepted: June 15, 2000
Published: January 1, 2001

Citation
Wu-chun Chou and Mark A. Neifeld, "Soft-decision array decoding for volume holographic memory systems," J. Opt. Soc. Am. A 18, 185-194 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-1-185

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