Quantum-secured Free-space Optical Communication for disaster management: a QPSK-Based system with hybrid atmospheric modelling and advanced mitigation strategies
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Jeyaseelan Jeyarani
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Jeyaseelan Alan
Abstract
This investigation examines the use of a Quadrature Phase Shift Keying (QPSK)-based Free-space Optical (FSO) Communication system combined with Quantum Key Distribution (QKD) for improved security and dependability in disaster management situations. We tackle the problems caused by atmospheric turbulence by utilizing a hybrid gamma–gamma and log–normal channel model to precisely characterize the FSO link. The proposed system’s purpose is to offer secure, high-bandwidth communication for emergency response coordination, telemedicine, and data transmission in environments affected by disasters. We present a system design and performance evaluation based on the hybrid atmospheric model, discuss the potential advantages, drawbacks, and countermeasures of the approach, and propose future research avenues, encompassing real-time adjustment, modulation variability, and field testing. Our implementation of real-time adaptation mechanisms lowers the BER by about 30 % under conditions affected by turbulence, while hybrid FSO/RF switching maintains uninterrupted connectivity during severe atmospheric attenuation.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The author states no conflict of interest.
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Research funding: None declared.
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Data availability: Not applicable.
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