基于智能反射面辅助的UAV转发应急通信网络性能分析  

Performance Analysis of UAV Relaying Emergency Communication Network Based on Intelligent Reflection Surface

作　　者：马佩勋 MA Pei-xun(Ecological livable college,Hunan Polytechnic of Environment and Biology,Hengyang 421005,China)

机构地区：[1]湖南环境生物职业技术学院生态宜居学院,衡阳421005

出　　处：《宇航计测技术》2023年第5期94-100,共7页Journal of Astronautic Metrology and Measurement

基　　金：中国残联课题研究项目(2021CDPFAT-06)资助。

摘　　要：在蜂窝基站无法提供通信覆盖区域时,可利用无人机作为转发节点构建无人机应急通信系统。为了提高应急通信系统的频谱效率和降低通信的中断概率,提出基于智能反射面(Intelligent Reflecting Surface,IRS)辅助的无人机转发的应急通信架构。该架构中蜂窝基站采用非正交多址接入(Non Orthogonal Multiple Access,NOMA)技术,并在无人机机身上安装IRS。IRS将来自蜂窝基站传输的信号反射至地面用户,克服蜂窝基站与用户间的非视距链路环境,进而降低通信的中断概率。同时,推导了中断概率的闭合表达式,并给出了计算遍历频谱效率上限公式。仿真结果验证了理论分析的正确性及所提出通信架构的优势性。In the area where the cellular base station cannot provide communication coverage for ground users,the Unmanned Aerial Vehicle(UAV)can be used as relay to construct UAV-emergency communication system.In order to improve the spectral efficiency and reduce the outage probability,emergency communication architecture based on Intelligent Reflecting Surface(IRS)assisted UAV relaying is proposed in this paper.In the communication architecture,cellular base station employs non orthogonal multiple access(NOMA)to serve ground users.An IRS is mounted on UAV.IRS reflects the signal transmitted from the base station to the ground users to overcome the non-line-of-sight link environment between the base station and the users,so that the outage probability is reduced.At the same time,the outage probability of communication is derived,and a bound of the ergodic spectral efficiency is estimated.Numerical results were given to confirm the validity of our theoretical analysis and the superiority of the proposed communication architecture.

关 键 词：应急通信 智能反射面 无人机 非正交多址接入 中断概率 遍历频谱效率 

分 类 号：TN929.5[电子电信—通信与信息系统]