混合电力线-自由空间光通信系统解码转发协议下的性能分析  

Performance Analysis of Mixed PLC/FSO Communication Systems

作　　者：张捷 陈生海 赵闻 黄友朋 蒋鑫伟 杨亮 ZHANG Jie;CHEN Shenghai;ZHAO Wen;HUANG Youpeng;JIANG Xinwei;YANG Liang(Measurement Center of Guangdong Power grid Co Ltd,Guangzhou 510080,China;College of Information Science and Engineering,Hunan University,Changsha 410082,China;Willfar Information Technology Co Ltd,Changsha 410205,China)

机构地区：[1]广东电网有限责任公司计量中心,广东广州510000 [2]湖南大学信息科学与工程学院,湖南长沙410082 [3]威胜信息技术股份有限公司,湖南长沙410000

出　　处：《湖南大学学报（自然科学版）》2022年第2期143-148,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(61671160);中国南方电网有限责任公司科技项目(GDKJXM20185366)。

摘　　要：针对电力线通信传播距离短问题,文章提出了基于解码转发中继的电力线-自由空间光(PLC/FSO)混合通信系统,并对其性能进行了分析.首先建立了混合系统的数学模型,分别采用对数正态分布和Gamma-Gamma分布来表征PLC及FSO信道衰落,并考虑FSO链路指向误差.其次,对混合系统性能进行了分析,推导出了中断概率、误码率和信道容量的闭合表达式.最后,利用计算机模拟仿真验证了推导结果的准确性.研究结果表明:脉冲噪声、大气湍流和指向误差会对通信系统产生一定的影响.Due to the short transmission distance of power line communication,a mixed power line and freespace optical(PLC/FSO)communication system with the decode and forward protocol is studied.First,the mathematical models for the mixed system is established by assuming the PLC and the FSO channels following the lognormal and Gamma-Gamma distributions,respectively,where the pointing error in the FSO link is also considered.Then,closed-form expressions for the outage probability,bit error rate,and the channel capacity are derived.Finally,simulation results are provided to verify our analytical results.Numerical results show that impulsive noise,turbulence,and the pointing error affect the system performance.

关 键 词：电力线通信 自由空间光通信 解码转发 性能分析 

分 类 号：TN971[电子电信—信号与信息处理]