智能反射面辅助的混合FSO/RF系统建模和分析  

Modeling and analysis of intelligent reflecting surface-assisted hybrid FSO/RF

作　　者：赵辉[1] 李静[1] 万辉 邓文超 ZHAO Hui;LI Jing;WAN Hui;DENG Wenchao(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《光通信技术》2023年第3期1-8,共8页Optical Communication Technology

基　　金：国家自然科学基金项目(批准号:12104078)资助;重庆市自然科学基金项目(批准号:csts2021jcyj-msxmX0836)资助。

摘　　要：针对自由空间光(FSO)链路视距受限问题,提出了一种光智能反射面(OIRS)辅助的混合FSO/射频(RF)系统,介绍了系统模型。OIRS用于解决障碍物遮挡问题,其辅助的FSO链路服从几何和抖动误差下的Malaga分布,RF链路服从任意相关的Nakagami-m分布,并在目的节点采用等增益合并接收技术。推导了混合FSO/RF系统的中断概率、平均误码率的闭合表达式,并对中断概率进行渐近分析。仿真结果表明:OIRS辅助的混合FSO/RF系统中断和误码性能取决于质量更差的一条信道,二进制相移键控调制误码性能优于二进制频移键控调制。Aiming at the problem of free-space optical(FSO)link line-of-sight constraint,this paper proposes an optical intelligent reflective surface(OIRS)-assisted hybrid FSO/radio frequency(RF)system,introduces the system model.OIRS is used to solve the obstacle occlusion problem,its auxiliary FSO link obeying the Malaga distribution under geometric and jitter errors,the RF link obeying the Nakagami-m distribution with arbitrary correlation and using equal-gain combined reception technique at the destination node.The closed-form expressions for the outage probability and average bit error rate of the hybrid FSO/RF system are derived,and asymptotic analysis of the outage probability is performed.The simulation results show that the interrupt and bit error performance of the OIRS-assisted hybrid FSO/RF system depends on the one channel with worse quality,and the bit error performance of the binary phase-shift keying modulation is better than the binary frequency-shift keying modulation.

关 键 词：智能反射面 自由空间光通信 混合双跳系统 性能分析 

分 类 号：TN92[电子电信—通信与信息系统]