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Study of an underwater accurate channel model considering comprehensive misalignment errors.

Shuo Han, Peng Yue, Xiang Yi

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |October 10, 2022
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    This study introduces a new model for misalignment errors in underwater optical wireless communication (UOWC) systems. The findings show that initial misalignment significantly degrades performance, highlighting the need for comprehensive error analysis.

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    Area of Science:

    • Optical Wireless Communication
    • Underwater Communication Systems
    • Signal Processing and Channel Modeling

    Background:

    • Underwater optical wireless communication (UOWC) transceivers often experience misalignment due to environmental factors and operational imprecision.
    • Existing models inadequately represent channel conditions when initial misalignment is present, impacting communication reliability.

    Purpose of the Study:

    • To develop a comprehensive misalignment errors model for UOWC systems, incorporating both random jitter and initial misalignment.
    • To analyze the impact of these comprehensive errors on system performance using a practical composite fading channel model.

    Main Methods:

    • Formulation of a novel misalignment errors model accounting for random jitter and initial angular deviations in 3D space.
    • Deduction of the effective receiving area considering receiver deflection.
    • Application of the model to a composite fading channel and derivation of closed-form bit error rate (BER) using Meijer G-function.

    Main Results:

    • Comprehensive misalignment errors lead to significant performance degradation in terms of average BER and outage probability.
    • The impact of initial misalignment errors is substantial and cannot be overlooked in UOWC system analysis.
    • The proposed model provides a more accurate representation of UOWC channel conditions under realistic misalignment scenarios.

    Conclusions:

    • Initial misalignment errors are critical factors affecting UOWC system performance and require thorough consideration.
    • The developed comprehensive misalignment model and performance analysis are vital for practical UOWC system design and deployment.
    • Further research should focus on mitigation strategies for these comprehensive misalignment errors in UOWC.