Soft-decision array decoding for volume holographic memory systems

Wu Chun Chou, Mark A. Neifeld

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)185-194
Number of pages10
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number1
StatePublished - Jan 2001
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition


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