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- W3092113303 abstract "Non-orthogonal multiple access (NOMA) aided unmanned aerial vehicle (UAV) is becoming a promising technique for future wireless networks. However, its security remains a great challenge due to the line-of-sight in UAV communications and high transmit power for weak users in NOMA. Thus, in this paper, we propose a power allocation (PA) scheme for NOMA-UAV networks with circular trajectory, to maximize the sum rate of common users while guaranteeing the security for a specific user. To achieve this, we consider three cases based on the distance from the UAV to the secure user. Specifically, the lowest transmit power is assigned to the secure user in each time slot to guarantee its security, with the remaining power allocated to common users to maximize their sum rate. To further improve the transmission rate of the secure user, we also derive the upper bound for its decoding threshold, and analyze the linear relationship between the secure decoding threshold and the sum rate of common users. Simulation results are demonstrated to evaluate the effectiveness of the proposed secure PA scheme in NOMA-UAV networks." @default.
- W3092113303 created "2020-10-15" @default.
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- W3092113303 date "2020-08-01" @default.
- W3092113303 modified "2023-09-27" @default.
- W3092113303 title "Power Allocation for Secure Transmission in Circular Trajectory NOMA-UAV Networks" @default.
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- W3092113303 doi "https://doi.org/10.1109/pimrc48278.2020.9217300" @default.
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