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SiPM joint likelihood reception for mobile LED-optical communication under pointing errors.

Dapeng Wang, Chao Wang, Yanyu Zhang

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    Summary
    This summary is machine-generated.

    This study introduces a joint maximum likelihood (JML) reception method for light-emitting diode (LED) optical communication. The JML method significantly reduces bit error rate (BER) caused by pointing errors in free-space optical systems.

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    Area of Science:

    • Optical Engineering
    • Wireless Communication Technologies

    Background:

    • Light-emitting diode (LED) optical communication offers advantages like wide field of view and light weight for free-space links.
    • Long-distance optical communication faces challenges from atmospheric turbulence and pointing errors, impacting signal integrity.

    Purpose of the Study:

    • To propose and evaluate a novel multi-pixel channel joint maximum likelihood (JML) reception method for LED optical communication.
    • To assess the performance of a highly sensitive silicon photomultiplier (SiPM) under mobile terminal jittering.

    Main Methods:

    • Developed a multi-pixel channel joint maximum likelihood (JML) reception algorithm utilizing a silicon photomultiplier (SiPM).
    • Analyzed the impact of optical transmitting power, pointing errors, and signal-to-noise ratio (SNR) gain.
    • Compared the JML algorithm with the single-channel maximum likelihood (ML) algorithm.

    Main Results:

    • The JML algorithm effectively mitigates the impact of pointing errors on the bit error rate (BER) of optical communications.
    • Performance improvement was observed by two orders of magnitude at large jitter radians and SNR.
    • Simulation and experimental results validated the proposed JML method's efficacy.

    Conclusions:

    • The proposed JML reception method using SiPM multi-pixel channels is a robust solution for mitigating pointing errors in LED optical communication.
    • This technique enhances the reliability of free-space optical communication systems, particularly under mobile and jittering conditions.