基于马尔科夫模型的双站激光微波混合链路性能分析  

Performance Analysis of Dual Ground Station Laser-Microwave Hybrid Links Based on Markov Model

作　　者：邵军虎[1,2] 杜旭晓 庞健 史魏征 SHAO Jun-hu;DU Xu-xiao;PANG Jian;SHI Wei-zheng(School of Automation and Information Engineering,Xi’an Key Laboratory of Wireless Optical Communication and Network Research,Xi’an University of Technology,Xi’an,Shaanxi 710048,China;Xiamen Key Laboratory of Mobile Multimedia Communications,Huaqiao University,Xiamen,Fujian 361021,China)

机构地区：[1]西安理工大学自动化与信息工程学院,西安市无线光通信与网络研究重点实验室,陕西西安710048 [2]华侨大学厦门市移动多媒体通信重点实验室,福建厦门361021

出　　处：《电子学报》2024年第2期468-476,共9页Acta Electronica Sinica

基　　金：国家自然科学基金青年基金(No.12104362);陕西省重点研发计划一般项目(No.2020GY-036);陕西省重点产业创新链项目(No.2017ZDCXL-GY-05-03);厦门市移动多媒体通信重点实验室(华侨大学)开放基金(No.HQUCOM17-02)。

摘　　要：针对气象变化对自由空间光(Free Space Optical,FSO)通信链路和毫米波射频(Radio Frequency,RF)通信链路可用率的影响问题,采用马尔科夫建模与稳态概率求解计算方法,分析不同天气条件下FSO/RF混合链路的双接收站分集与中断概率性能.基于FSO链路和RF链路的信道模型,采用有限状态马尔科夫链(Finite State Markov Chain,FSMC)分别对单双站FSO/RF混合链路的切换选择进行建模,推导得出不同参数和天气情况下系统稳态的中断概率表达式.数值计算结果表明,当中断概率达到10^(-6),雨雾天气链路距离为1~7 km时,双站FSO/RF混合链路相比单站可获得4~25 dB的增益.Aiming at the system availability problem of free space optical(FSO)link and millimeter wave radio fre⁃quency(RF)link under various meteorological conditions,multiple ground station diversity and system outage probability performance were investigated by using Markov model steady-state probability equilibrium method.Based on the channel models of FSO link and RF link,hybrid link selection finite state Markov chain(FSMC)was established for single and du⁃al station scheme respectively.Then their outage probability expressions were derived and calculated under different sys⁃tem parameters and weather conditions.Numerical results show that at outage probability 10^(-6),with link distance 1~7 km under rainy and foggy weather conditions,the dual ground station FSO/RF hybrid link can achieve 4~25 dB gain compared to single station case.

关 键 词：FSO/RF混合链路 多站分集 马尔科夫模型 中断概率 误码率 

分 类 号：TN929.12[电子电信—通信与信息系统] TN911.3[电子电信—信息与通信工程]