arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.10015eess.SP
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基于功率分配的低复杂度联合功率分配与航迹设计

Low-Complexity Joint Power Allocation and Trajectory Design for UAV-Enabled Secure Communications with Power Splitting

Kaidi Xu, Ming-Min Zhao, Yunlong Cai, Lajos Hanzo

摘要:

设计并研究了一种无人机辅助的安全通信系统,该系统在存在窃听者的情况下向地面用户传输合法信息。为了保证安全性,无人机采用了功率分配方法,其发射功率可以分为两部分,分别用于传输机密消息和人工噪声(AN)。我们的目标是最大限度地提高平均保密率,通过联合优化无人机的轨迹,发射功率水平和相应的功率分配比分配到不同的时隙在整个飞行时间,受最大无人机速度约束,总移动能量约束,总发射功率约束,和其他相关的约束。为了有效地解决这个非凸优化问题,我们提出了一个迭代算法,通过混合块坐标下降(BCD)方法,凹凸过程(CCCP)和交替方向乘法器(ADMM)的好处。特别地,我们表明,该算法具有非常低的计算复杂度,其每个更新步骤可以制定在一个接近封闭的形式。仿真结果验证了该算法的有效性。

英文摘要:

An unmanned aerial vehicle (UAV)-aided secure communication system is conceived and investigated, where the UAV transmits legitimate information to a ground user in the presence of an eavesdropper (Eve). To guarantee the security, the UAV employs a power splitting approach, where its transmit power can be divided into two parts for transmitting confidential messages and artificial noise (AN), respectively. We aim to maximize the average secrecy rate by jointly optimizing the UAV's trajectory, the transmit power levels and the corresponding power splitting ratios allocated to different time slots during the whole flight time, subject to both the maximum UAV speed constraint, the total mobility energy constraint, the total transmit power constraint, and other related constraints. To efficiently tackle this non-convex optimization problem, we propose an iterative algorithm by blending the benefits of the block coordinate descent (BCD) method, the concave-convex procedure (CCCP) and the alternating direction method of multipliers (ADMM). Specially, we show that the proposed algorithm exhibits very low computational complexity and each of its updating steps can be formulated in a nearly closed form. Our simulation results validate the efficiency of the proposed algorithm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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