Aerial Relay to Achieve Covertness and Security
<|reference_start|>Aerial Relay to Achieve Covertness and Security: In this work, a delay-tolerant unmanned aerial vehicle (UAV) relayed covert and secure communication framework is investigated. In this framework, a legitimate UAV serves as an aerial relay to realize communication when the direct link between the terrestrial transmitter and receiver is blocked and also acts as a friendly jammer to suppress the malicious nodes presented on the ground. Subsequently, considering the uncertainty of malicious nodes' positions, a robust fractional programming optimization problem is built to maximize energy efficiency by jointly optimizing the trajectory of the UAV, the transmit power of the transmitter, and the time-switching factor. For the extremely complicated covert constraint, Pinsker's inequality, Jensen's inequality, and the bisection search method are employed to construct a tractable shrunken one. After this, an alternate optimization-based algorithm is proposed to solve the fractional programming optimization problem. To achieve low complexity, we design the primal-dual search-based algorithm and the successive convex approximation-based algorithm, respectively, for each sub-problem. Numerical results show the effectiveness of our proposed algorithm.<|reference_end|>
@article{jiang2024aerial,
    title={Aerial Relay to Achieve Covertness and Security},
    author={Jiacheng Jiang, Hongjiang Lei, Ki-Hong Park, Gaofeng Pan, Mohamed-Slim
  Alouini},
    journal={arXiv preprint arXiv:2406.06842},
    year={2024},
    archivePrefix={arXiv},
    eprint={2406.06842},
    primaryClass={cs.IT eess.SP math.IT}
}