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

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.