混合自由空间光/射频通信系统的性能分析  

Performance Analysis of Hybrid Free Space Optical/Radio Frequency Communication System

作　　者：吴琰 梅海平 戴聪明 赵凤美 魏合理 Wu Yan;Mei Haiping;Dai Congming;Zhao Fengmei;Wei Heli(Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China;Science Island Branch of Graduate School,University of Science and Technology of China,Hefei,Anhui 230026,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei,Anhui 230037,China;School of Electronic Engineering,Huainan Normal University,Huainan,Anhui 232038,China)

机构地区：[1]中国科学院安徽光学精密机械研究所大气光学重点实验室 [2]中国科学技术大学研究生院科学岛分院 [3]安徽省先进激光技术实验室 [4]淮南师范学院电子工程学院

出　　处：《激光与光电子学进展》2021年第17期195-201,共7页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2019YF0706004);装备预研基金(41416020204);安徽省教育厅2018年度高校科学研究项目重点项目(KJ2018A0464)。

摘　　要：在指数韦伯湍流信道和Nakagami-m衰弱信道条件下,研究了基于选择合并技术的混合自由空间光/射频(FSO/RF)通信系统的性能。在考虑指向性误差的情况下,推导了基于副载波调制和强度调制/直接检测方案的选择合并混合FSO/RF通信系统的平均误码率和中断概率,并利用Meijer-G函数和扩展广义双变量Meijer-G函数得到其表达式。在不同副载波调制方式、湍流强度、指向性误差和RF信道衰弱参数m的情况下,分析了混合FSO/RF通信系统和FSO系统的误码率和中断概率。仿真结果表明,基于相干二进制相移键控副载波调制技术的混合FSO/RF通信系统性能明显优于其他三种调制技术;相比FSO系统,混合FSO/RF通信系统的性能更好。Under the conditions of exponentiated Weibull turbulent channel and Nakagami-m fading channel,the performance of hybrid free space optical/radio frequency(FSO/RF)communication system based on the selective combination technology is studied in this paper.Considering the pointing errors,this paper deduces the average bit error rate and outage probability of the selective combination hybrid FSO/RF communication system which adopts subcarrier modulation and intensity modulation/direct detection scheme,and obtains their new expressions by Meijer-G function and extended generalized bivariate Meijer-G function.The bit error rate and outage probability performance of hybrid FSO/RF communication system and FSO system are investigated under different subcarrier modulation schemes,turbulence intensity,pointing errors and RF channel fading parameter m.The simulation results show that the performance of the hybrid FSO/RF communication system using coherent binary phase shift keying subcarrier modulation technology is significantly better than the other three modulation technologies,and the performance of hybrid FSO/RF communication system is better than that of FSO system.

关 键 词：光通信 混合通信系统 指数韦伯湍流信道 Nakagami-m衰弱信道 平均误码率 中断概率 

分 类 号：TN929.12[电子电信—通信与信息系统]