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
邵军虎 1杜旭晓 2庞健 2史魏征2
作者信息
- 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;华侨大学厦门市移动多媒体通信重点实验室,福建厦门 361021
- 2. 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
- 折叠
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.
Abstract
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Key words
FSO/RF hybrid link/multiple ground station diversity/Markov model/outage probability/bit error rate引用本文复制引用
基金项目
国家自然科学基金青年基金(12104362)
陕西省重点研发计划一般项目(2020GY-036)
陕西省重点产业创新链项目(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(HQUCOM17-02)
出版年
2024
国家科技期刊平台
NSTL
万方数据