arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2208.14751cs.ITeess.SPmath.IT
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恶意干扰下IRS辅助UAV数据汇集系统的节能设计

Energy Efficient Design in IRS-Assisted UAV Data Collection System under Malicious Jamming

Zhi Ji, Jia Tu, Xinrong Guan, Wendong Yang, Weiwei Yang, Qingqing Wu

摘要:

在本文中,我们研究了无人机(UAV)使能的数据汇集系统,其中部署了智能反射表面(IRS),以协助在干扰机存在的情况下从物联网(IoT)设备集群到无人机的通信。我们的目标是提高能源效率(EE)通过联合设计的无人机轨迹,IRS无源波束形成,设备功率分配和通信调度。然而,非线性分式规划问题是具有挑战性的解决,由于其非凸性和耦合变量。为了克服这个困难,我们提出了一个交替优化的算法来解决它的次优利用Dinkelbach算法,逐次凸逼近(SCA)技术,块坐标下降(BCD)方法。大量的仿真结果表明,所提出的设计可以显着提高抗干扰性能。特别是,对于远程干扰机的情况下,所提出的设计可以大大缩短飞行路径,从而通过信号增强降低能量消耗;而对于本地干扰机的情况下,这被认为是非常具有挑战性的传统系统没有IRS,因为撤退的策略变得无效,我们提出的设计甚至实现了更高的性能增益,由于有效的干扰信号缓解。

英文摘要:

In this paper, we study an unmanned aerial vehicle (UAV) enabled data collection system, where an intelligent reflecting surface (IRS) is deployed to assist in the communication from a cluster of Internet-of-Things (IoT) devices to a UAV in the presence of a jammer. We aim to improve the energy efficiency (EE) via the joint design of UAV trajectory, IRS passive beamforming, device power allocation, and communication scheduling. However, the formulated non-linear fractional programming problem is challenging to solve due to its non-convexity and coupled variables. To overcome the difficulty, we propose an alternating optimization based algorithm to solve it sub-optimally by leveraging Dinkelbach's algorithm, successive convex approximation (SCA) technique, and block coordinate descent (BCD) method. Extensive simulation results show that the proposed design can significantly improve the anti-jamming performance. In particular, for the remote jammer case, the proposed design can largely shorten the flight path and thus decrease the energy consumption via the signal enhancement; while for the local jammer case, which is deemed highly challenging in conventional systems without IRS since the retreating away strategy becomes ineffective, our proposed design even achieves a higher performance gain owing to the efficient jamming signal mitigation.

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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