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QoE-Driven UAV-Enabled Pseudo-Analog Wireless Video Broadcast A Joint Optimization of Power and Trajectory

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Document pages: 15 pages

Abstract: The explosive demands for high quality mobile video services have causedheavy overload to the existing cellular networks. Although the small cell hasbeen proposed to alleviate such a problem, the network operators may not beinterested in deploying numerous base stations (BSs) due to expensiveinfrastructure construction and maintenance. The unmanned aerial vehicles(UAVs) can provide the low-cost and quick deployment, which can supporthigh-quality line-of-sight communications and have become promising mobile BSs.In this paper, we propose a quality-of-experience (QoE)-driven UAV-enabledpseudo-analog wireless video broadcast scheme, which provides mobile videobroadcast services for ground users (GUs). Due to limited energy available inUAV, the aim of the proposed scheme is to maximize the minimum peaksignal-to-noise ratio (PSNR) of GUs video reconstruction quality by jointlyoptimizing the transmission power allocation strategy and the UAV trajectory.Firstly, the reconstructed video quality at GUs is defined under theconstraints of the UAV s total energy and motion mechanism, and the proposedscheme is formulated as a complex non-convex optimization problem. Then, theoptimization problem is simplified to obtain a tractable suboptimal solutionwith the help of the block coordinate descent model and the successive convexapproximation model. Finally, the experimental results are presented to showthe effectiveness of the proposed scheme. Specifically, the proposed scheme canachieve over 1.6dB PSNR gains in terms of GUs minimum PSNR, compared with thestate-of-the-art schemes, e.g., DVB, SoftCast, and SharpCast.

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