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Distortion minimization for multimedia transmission in NOMA HAP-UAV integrated aerial access networks

查看全文 作　　者：Guobin [1]ZHANG;Zhu [2]HAN;Hang [1]XIN;Xin [3]WEI;Boya [4]DI 高影响力作者 机构地区：[1]School of Electrical Engineering and Intelligentization,Dongguan University of Technology,Dongguan 523808,China;[2]Department of Electrical and Computer Engineering and Department of Computer Science,University of Houston,TX77004,USA;[3]School of Computer Science and Technology,Dongguan University of Technology,Dongguan 523808,China;[4]Department of Computing,Imperial College,London SW72Az,UK高影响力机构 出　　处：《Chinese Journal of Aeronautics》索引2022年第35卷第9期,共14页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(61901115,62171188)。 摘　　要：Aerial access networks have been envisioned as a promising 6G solution to enhance the ground communication systems in both coverage and capacity. To better utilize the spectrum and fully explore different channel characteristics, this paper constructs an integrated network comprising the High Altitude Platform(HAP) and Unmanned Air Vehicles(UAVs) with the NonOrthogonal Multiple Access(NOMA) technology. In order to improve the transmission quality of images and videos, a power management scheme is proposed to minimize the distortion of the transmissions from the HAP and UAVs to the terminals. The power control is formulated as a non-convex problem constrained by the maximal transmit power and the minimal terminal rate requirements. The variable substitution and the first-order Tailor’s expansion is used to transform it into a sequence of convex problems, which are subsequently solved through the gradient projection method. Simulation demonstrates the signal distortion and error rate improvement achieved by the proposed algorithm. 关 键 词：Aerial Access Networks High Altitude Platform Non-Orthogonal Multiple Access Sixth-Generation Unmanned Air Vehicles
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