| 摘要: |
| 无人机(Unmanned Aerial Vehicle,UAV)在现代战争中的应用优势受到了越来越多的关注，为其配置可同时投射和反射的可重构智能表面（Simultaneous Transmitting and Reflecting-Reconfigurable Intelligent Surface,STAR-RIS）可以在无线网络中以低成本实现高频谱和能源效率。考虑UAV辅助的STAR-RIS认知无线电非正交多址（Cognitive Radio Non-orthogonal Multiple Access,CR-NOMA）架构，针对实际通信场景中非理想传输因素同相位和正交相位不平衡（In-phase and Quadrature-phase Imbalance,IQI）存在时，研究人工噪声(Artificial Noise,AN)对系统物理层安全性能的影响，推导了认知用户的中断概率和截获概率的近似表达式，同时对比了人工噪声方案与非人工噪声方案下用户的截获性能。仿真结果表明，较低的IQI水平时远用户比近用户在15 dB时中断概率低约0.15，较高的IQI水平时近用户比远用户在25 dB时中断概率低约0.9，而加入人工噪声能够降低用户约0.3的截获概率，从而提高系统安全性能。 |
| 关键词: 认知无线电非正交多址（CR-NOMA） 同时投射和反射的可重构智能表面(STAR-RIS) 无人机 物理层安全 人工噪声 |
| DOI：10.20079/j.issn.1001-893x.240612004 |
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| 基金项目:山西省科技创新人才团队专项计划(202304051001035)；山西省留学人员科技活动择优资助项目(20240023) |
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| Security Performance Analysis of UAV-assisted Non-ideal STAR-RIS Cognitive NOMA Physical Layer |
| LI Meiling,REN Kang,XUE Kaixuan,LI Shixing,LI Zhen |
| (1.School of Electronic Information Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;2.North Automation Control Technology Institute,Taiyuan 030006,China) |
| Abstract: |
| The advantages of unmanned aerial vehicle(UAV) in modern warfare have received increasing attention,and configuring it with simultaneous transmitting and reflecting-reconfigurable intelligent surface(STAR-RIS) can achieve spectrum and energy efficiency in wireless networks at a low cost.Therefore,the UAV-assisted STAR-RIS cognitive radio non-orthogonal multiple access(CR-NOMA) architecture is considered and for real communication scenarios in which non-ideal transmission factors in-phase and quadrature-phase imbalance(IQI) exists,the impact of artificial noise(AN) on the security performance of the physical layer of the system is investigated,approximate expressions for the outage probability and interception probability of cognitive users are derived,and also the interception performance of users under the AN scenario is compared with that of the non-artificial noise scenario.Simulation results show that the far user has about 0.15 lower outage probability than the near user at 15 dB for lower IQI levels,while the near user has about 0.9 lower outage probability than the far user at 25 dB for higher IQI levels;and the addition of AN is able to reduce the user搒 interception probability by about 0.3,which improves the system security performance. |
| Key words: cognitive radio non-orthogonal multiple access(CR-NOMA) simultaneous transmitting and reflecting-reconfigurable intelligent surface(STAR-RIS) unmanned aerial vehicle physical layer security artificial noise |
