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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 28 — Oct. 1, 2006
  • pp: 7401–7409

Iterative soft-minimum mean-square error equalization for digital nonlinear page-oriented memories

Mehmet Keskinoz  »View Author Affiliations

Applied Optics, Vol. 45, Issue 28, pp. 7401-7409 (2006)

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Digital page-oriented volume holographic memory (POVHM) is a promising candidate for next-generation ultrahigh capacity optical data storage technology. As the capacity of the POVHMs increases, the bit error rate performance of the system is degraded due to increased interpixel interference (IPI) and noise. To improve the system performance under these adverse effects and to increase the capacity, joint iterative soft equalization–detection and error correction decoding might be attractive. To address that, by considering the nonlinearity inherent in the channel, an iterative soft equalization method that is optimized in the minimum mean-square error (MMSE) sense, called the iterative soft-MMSE (ISMMSE) equalization, is devised. The performance of the ISMMSE is evaluated by use of numerical experiments under different amounts of IPI and optical noise. Simulation results suggest that the ISMMSE is a good candidate for an ultrahigh capacity POVHM, which employs joint iterative equalization–detection and decoding.

© 2006 Optical Society of America

OCIS Codes
(210.0210) Optical data storage : Optical data storage
(210.2860) Optical data storage : Holographic and volume memories
(210.4680) Optical data storage : Optical memories

ToC Category:
Optical Data Storage

Original Manuscript: December 12, 2005
Manuscript Accepted: April 7, 2006

Mehmet Keskinoz, "Iterative soft-minimum mean-square error equalization for digital nonlinear page-oriented memories," Appl. Opt. 45, 7401-7409 (2006)

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