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Soft-decision array decoding for volume holographic memory systems.

W Chou1, M A Neifeld

  • 1Department of Electrical and Computer Engineering, University of Arizona, Tucson 85721, USA. awc005@email.mot.com

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|January 11, 2001
PubMed
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This study introduces a novel soft-decision array decoding method for volume holographic memory (VHM) systems. This advanced technique improves data integrity by mitigating interpixel interference and detector noise, enhancing storage capacity and density.

Area of Science:

  • Data storage systems
  • Information theory
  • Optical memory technologies

Background:

  • Volume holographic memory (VHM) systems face challenges from interpixel interference (IPI) and detector noise, limiting storage capacity and data integrity.
  • Existing methods often involve separate equalization and error decoding steps, which can be suboptimal.
  • Soft-decision decoding offers a unified approach to address channel impairments.

Purpose of the Study:

  • To investigate the efficacy of soft-decision array decoding for mitigating IPI and detector noise in VHM systems.
  • To develop a highly parallel array decoder for enhanced error correction and channel mitigation.
  • To demonstrate superior performance compared to traditional hard-decision decoding methods.

Main Methods:

  • Implementation of a soft-decision array decoding algorithm.

Related Experiment Videos

  • Leveraging iterative turbo-decoding principles for enhanced decoding performance.
  • Incorporation of a priori knowledge of the IPI channel into the decoding process.
  • Joint detection and decoding algorithm design.

    • Main Results:

    • The proposed soft-decision array decoder effectively mitigates IPI and detector noise in VHM.
    • The joint detection decoding algorithm achieves performance superior to concatenated hard-decision Reed-Solomon codes and Wiener filters.
    • Demonstrated improvements in VHM capacity and density.

    Conclusions:

    • Soft-decision array decoding provides a powerful framework for improving VHM performance.
    • The developed algorithm offers a significant advancement in error correction and data recovery for holographic storage.
    • This approach paves the way for higher-density and more reliable optical data storage.