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Generalized modulation for distance-aware optical camera communication beyond oversampled and undersampled schemes.

Ke Dong, Miaomiao Kong, Weiqiang Su

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    This study reveals the unity between oversampled modulation (OM) and undersampled modulation (UM) in optical camera communication (OCC). A new generalized modulation scheme enables distance-aware performance for efficient and reliable OCC.

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    Area of Science:

    • Optical Camera Communication (OCC)
    • Wireless Optical Communication
    • Signal Modulation Schemes

    Background:

    • Oversampled modulation (OM) and undersampled modulation (UM) are established optical camera communication (OCC) schemes.
    • OM is favored for high-speed, short-range communication, while UM excels in reliable, long-distance links.
    • The performance trade-offs and interrelation between OM and UM across various distances remain underexplored.

    Purpose of the Study:

    • To investigate the impact of communication distance and modulation parameters on pixel efficiency and packet delivery rate in OCC.
    • To demonstrate the inherent connection between traditional OM and UM schemes.
    • To propose a generalized modulation scheme for distance-aware OCC performance optimization.

    Main Methods:

    • Analysis of distance and modulation parameter effects on pixel efficiency and packet delivery rate.
    • Development of a generalized modulation scheme by adjusting parameters like packet length and repetition counts.
    • Validation through simulations and experimental results.

    Main Results:

    • Demonstrated the underlying unity of OM and UM schemes.
    • The proposed generalized modulation scheme allows for achieving specific link performance based on distance.
    • The generalized scheme offers distance-aware capabilities beyond the specialized OM and UM approaches.

    Conclusions:

    • The research deepens the understanding of optical camera communication data modulation.
    • A theoretical framework is established for optimizing OCC efficiency and reliability in diverse environments.
    • The generalized modulation scheme provides a flexible approach to OCC system design.