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• W4200026471 abstract "In this paper, an unmanned aerial vehicle (UAV) enabled secure downlink communication is considered, where a single-antenna UAV serves multiple ground users facilitated by orthogonal frequency-division multiple access (OFDMA), in the presence of an eavesdropper (EV) with imperfect channel state information. To enhance the secrecy rate (SR), we employ a power splitting approach, where part of the transmit power is used for communication while the rest is used for jamming. We maximize the average secrecy rate (ASR) by jointly optimizing the bandwidth, trajectory, power allocation, and power splitting ratio. To tackle this non-convex and computationally intractable optimization problem, we propose a novel algorithm by employing successive convex approximation, block coordinate descend and <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$S$</tex> -procedure. Numerical results show that our proposed joint optimization algorithm outperforms the benchmark schemes." @default.
• W4200026471 created "2021-12-31" @default.
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• W4200026471 date "2021-09-01" @default.
• W4200026471 modified "2023-10-18" @default.
• W4200026471 title "Secure UAV-enabled OFDMA Communications" @default.
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• W4200026471 doi "https://doi.org/10.1109/vtc2021-fall52928.2021.9625221" @default.
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