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Fixed-length two-dimensional modulation coding for imaging page-oriented optical data storage systems.

Dhawat E Pansatiankul1, Alexander A Sawchuk

  • 1Signal and Image Processing Institute, the University of Southern California, Los Angeles, California 90089-2564, USA.

Applied Optics
|January 28, 2003
PubMed
Summary

This study introduces a new 2-D modulation coding scheme to combat intersymbol interference (ISI) in page-oriented optical data storage (PODS) systems, improving data reliability for 2-D bit image storage.

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Area of Science:

  • Data Storage Technologies
  • Information Theory
  • Optical Engineering

Background:

  • Page-Oriented Optical Data Storage (PODS) systems store data in a two-dimensional (2-D) bit image format.
  • Conventional serial data storage systems exhibit different intersymbol interference (ISI) characteristics compared to imaging PODS systems.
  • Understanding ISI is crucial for enhancing data integrity in 2-D storage formats.

Purpose of the Study:

  • To comprehensively discuss modulation coding strategies for PODS systems.
  • To model and analyze intersymbol interference (ISI) in 2-D imaging data storage.
  • To introduce a novel 2-D modulation coding scheme to mitigate ISI in PODS.

Main Methods:

  • Development of several 2-D mathematical models for PODS systems, including two-photon systems.

Related Experiment Videos

  • Characterization of intersymbol interference (ISI) unique to imaging PODS systems.
  • Design and presentation of a novel 2-D modulation coding scheme and numerous fixed-length code examples.

    • Main Results:

    • Identified distinct ISI characteristics in imaging PODS systems compared to serial storage.
    • Proposed a novel 2-D modulation coding scheme to effectively address ISI in PODS.
    • Analyzed and compared the bit-error rate (BER) performance of various developed codes.

    Conclusions:

    • The novel 2-D modulation coding scheme offers a viable solution for mitigating ISI in PODS.
    • The developed codes demonstrate diverse properties suitable for different storage requirements.
    • The findings contribute to improving the reliability and performance of page-oriented optical data storage.