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Related Experiment Video

Updated: Feb 10, 2026

Quasi-light Storage for Optical Data Packets
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Decision feedback equalizer for holographic data storage.

Kyuhwan Kim, Seung Hun Kim, Gyogwon Koo

    Applied Optics
    |May 24, 2018
    PubMed
    Summary

    This study introduces a modified decision feedback equalizer (DFE) and a reliability factor to improve holographic data storage (HDS) performance by reducing interference and preventing errors.

    Area of Science:

    • Optoelectronics
    • Information Storage
    • Signal Processing

    Background:

    • Holographic data storage (HDS) is a promising next-generation storage technology.
    • Two-dimensional (2D) inter-symbol interference (ISI) significantly degrades HDS performance.
    • Existing partial-response maximum-likelihood (PRML) methods for 2D ISI reduction have drawbacks.

    Purpose of the Study:

    • To address the limitations of current methods for holographic data storage.
    • To propose a novel modified decision feedback equalizer (DFE) for HDS.
    • To introduce a reliability factor to mitigate error propagation in DFEs for HDS.

    Main Methods:

    • Development of a modified decision feedback equalizer (DFE) tailored for HDS.
    • Implementation of a reliability factor to enhance DFE robustness against error propagation.

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  • Extensive simulations to evaluate the performance of the proposed techniques.

    • Main Results:

    • The proposed modified DFE and reliability factor demonstrate superior bit error rate (BER) performance.
    • The methods exhibit fast processing speeds post-training.
    • Consistent performance improvements were observed across various simulations.

    Conclusions:

    • The modified DFE with a reliability factor effectively overcomes drawbacks of PRML for HDS.
    • The proposed approach offers a viable solution for enhancing the reliability and efficiency of holographic data storage.
    • The methods provide a significant advancement in signal processing for HDS systems.