无人机-红外系统辅助安全 SWIPT 系统的高能效轨迹设计

IF 5.8 2区 计算机科学 Q1 TELECOMMUNICATIONS
Li Zhao, Shaocheng Qu, Hongbo Xu, Ziming Wei, Chen Zhang
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引用次数: 0

摘要

无人驾驶飞行器(UAV)具有可控机动性、覆盖范围广、成本低等特点,在灾后救援、货物运输和应急通信方面具有巨大潜力。考虑到其有限的机载能源,无人飞行器的节能通信是一项挑战。本研究在考虑旋转翼无人机飞行能量的同时,研究了由智能反射面(IRS)和无人机辅助的同步无线信息和电力传输(SWIPT)系统的安全性。具体来说,在无人机上安装 IRS 可提高合法传输的质量,在基站(BS)中引入人工噪声(AN)可降低窃听质量。地面设备(GD)采用功率分配(PS)技术,以同时解码信息和收集能量。首先,我们联合设计了基站发射波束成形、无人机-红外系统相移和轨迹/速度以及地面设备功率分配比例,目的是最大化所有地面设备的总保密率。然后,开发了一种迭代算法来解决所提出的问题。特别是,为了处理这个复杂的目标函数,引入了额外的变量,并将原始问题解耦为多个子问题,这些子问题可以通过连续凸近似(SCA)和半定量松弛(SDR)技术交替求解。最后,数值结果表明,与基准方案相比,在飞行能量预算 ethr=5KJ 和反射元素数量 Nr=25 的条件下,拟议方案在无人机-红外系统辅助的 SWIPT 系统的安全率方面表现出了可观的性能,其性能至少提高了 12%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Energy-efficient trajectory design for secure SWIPT systems assisted by UAV-IRS

Due to its controllable maneuverability, wide coverage, and low cost, unmanned aerial vehicle (UAV) has great potential in post-disaster rescue, cargo transport and emergency communication. Considering its limited onboard energy, energy-efficient UAV communication is a challenge. This research examines the security of simultaneous wireless information and power transfer (SWIPT) systems assisted by intelligent reflecting surfaces (IRS) and UAVs while considering the flight energy of rotary-wing UAVs. Specifically, an IRS is mounted on a UAV to enhance the quality of legitimate transmission, and artificial noise (AN) is introduced into the base station (BS) to reduce eavesdropping quality. The power splitting (PS) technology is adopted at ground devices (GDs) to simultaneously decode information and harvest energy. First, we jointly design the BS transmit beamforming, UAV-IRS phase shifts and trajectory/velocity as well as GDs PS ratio with the aim of maximizing the sum secrecy rate of all GDs. Then, an iterative algorithm is developed to address the formulated problem. In particular, additional variables are introduced to handle this complicated objective function, and the original problem is decoupled into multiple sub-problems, which can be solved alternately by invoking the successive convex approximation (SCA) and semidefinite relaxation (SDR) techniques. Finally, numerical results demonstrate that the proposed scheme exhibits a substantial performance in the security rate of SWIPT systems assisted by UAV-IRS, and its performance is improved by at least 12% compared to benchmark schemes at the flight energy budget ethr=5KJ and the number of reflecting elements Nr=25.

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来源期刊
Vehicular Communications
Vehicular Communications Engineering-Electrical and Electronic Engineering
CiteScore
12.70
自引率
10.40%
发文量
88
审稿时长
62 days
期刊介绍: Vehicular communications is a growing area of communications between vehicles and including roadside communication infrastructure. Advances in wireless communications are making possible sharing of information through real time communications between vehicles and infrastructure. This has led to applications to increase safety of vehicles and communication between passengers and the Internet. Standardization efforts on vehicular communication are also underway to make vehicular transportation safer, greener and easier. The aim of the journal is to publish high quality peer–reviewed papers in the area of vehicular communications. The scope encompasses all types of communications involving vehicles, including vehicle–to–vehicle and vehicle–to–infrastructure. The scope includes (but not limited to) the following topics related to vehicular communications: Vehicle to vehicle and vehicle to infrastructure communications Channel modelling, modulating and coding Congestion Control and scalability issues Protocol design, testing and verification Routing in vehicular networks Security issues and countermeasures Deployment and field testing Reducing energy consumption and enhancing safety of vehicles Wireless in–car networks Data collection and dissemination methods Mobility and handover issues Safety and driver assistance applications UAV Underwater communications Autonomous cooperative driving Social networks Internet of vehicles Standardization of protocols.
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