双跳混合RF/MIMO FSO放大转发中继通信系统性能分析  

Performance Analysis of Dual-Hop Mixed RF/MIMO FSO Amplify and Forward Relay Communication System

作　　者：韩立强[1] 江红兵 Han Liqiang;Jiang Hongbing(School of Electrical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China)

机构地区：[1]燕山大学电气工程学院,河北秦皇岛066004

出　　处：《激光与光电子学进展》2020年第13期96-105,共10页Laser & Optoelectronics Progress

基　　金：河北省引进留学人员资助(C20190369)。

摘　　要：提出了一种双跳混合射频(RF)和多输入多输出(MIMO)自由空间光通信(FSO)放大转发中继通信系统。RF链路和MIMOFSO链路分别考虑Rayleigh衰落分布模型和Gamma-Gamma大气湍流信道模型,多孔径接收端采用等增益合并方式。在中继分别为固定增益和变增益放大转发下,推导出关于混合系统信噪比的累计分布函数和概率密度函数,进一步得到混合RF和MIMOFSO系统的中断概率、遍历容量及在不同二进制调制方式下的平均误码率的闭合表达式。仿真分析了不同增益模式下大气湍流、调制方式及空间分集对混合RF/MIMO FSO双跳中继通信系统性能的影响。This paper presents a dual-hop mixed radio frequency(RF)and multiple-input multiple-output(MIMO)free-space optical(FSO)amplify and forward(AF)relay communication system.The RF link and MIMO FSO link consider the Rayleigh fading distribution model and the Gamma-Gamma atmospheric turbulence channel model,respectively.The multi-aperture receiver adopts equal gain combination mode.Under the relays with fixed gain and variable gain AF,the cumulative distribution function of the signal-to-noise ratio of the hybrid system and its probability density function are derived.Closed-form mathematical formulas of the outage probability,ergodic capacity,and average bit error rate for different binary modulation modes of the mixed RF/MIMO FSO system are obtained.The effects of the atmospheric turbulence,modulation mode,and space diversity on the performance of the mixed RF/MIMO FSO dual-hop relay communication system under different gain modes are simulated and analyzed.

关 键 词：大气光学 混合射频和多输入多输出 自由空间光通信 等增益合并 放大转发 中断概率 

分 类 号：TN929.1[电子电信—通信与信息系统]