电子学报 ›› 2022, Vol. 50 ›› Issue (1): 26-35.DOI: 10.12263/DZXB.20210087

• 无线光通信及其组网技术 • 上一篇    下一篇

基于Kappa-mu/M分布的联合多用户分集与并行中继继选择RF/FSO系统性能研究

张敏惠1, 童杨1, 王怡1,2   

  1. 1.中国计量大学信息工程学院浙江省电磁波信息技术与计量检测重点实验室,浙江 杭州 310018
    2.成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川 成都 610059
  • 收稿日期:2021-01-08 修回日期:2021-03-18 出版日期:2022-01-25 发布日期:2022-01-25
  • 作者简介:张敏惠 男,1995年出生于浙江省嘉兴市.硕士研究生,主要从事RF/FSO通信和自由空间激光通信方面的研究工作. E-mail:645470568@qq.com
    童 杨 男,1997年出生于浙江省台州市.硕士研究生,主要从事RF/FSO通信和自由空间激光通信方面的研究工作. E-mail:1246898298@qq.com
    王 怡(通信作者) 女,1980年生于黑龙江省哈尔滨市.博士,教授,主要从事星地光通信、RF/FSO通信和自由空间激光通信方面的研究工作. E-mail:wcy16@cjlu.edu.cn
  • 基金资助:
    成都理工大学地质灾害防治与地质环境保护国家重点实验室开放基金(SKLGP2020K017);国家自然科学基金(51704267)

Performance Analysis of Multiuser Diversity and Parallel Relay Selection RF/FSO System over Kappa-mu/M Distribution Channels

ZHANG Min-hui1, TONG Yang1, WANG Yi1,2   

  1. 1.Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province,College of Information Engineering,China JiLiang University,Hangzhou,Zhejiang 310018,China
    2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,Sichuan 610059,China
  • Received:2021-01-08 Revised:2021-03-18 Online:2022-01-25 Published:2022-01-25

摘要:

本文在能够表征大多数信道条件的Kappa-mu/M分布混合统计模型组合下,研究了存在同频干扰的联合多用户分集与并行中继选择射频技术/自由空间光通信系统,分别推导出系统的中断概率的Meijer G解析表达式和渐近近似表达式.通过仿真解析、渐近近似表达式,分析了信道衰落、指向误差、同频干扰、用户选择和并行中继选择等关键因素对系统的中断性能的影响,更进一步分析了高信噪比下的渐近结果并得出了系统的分集阶数.为了验证解析表达式的有效性,给出了蒙特卡罗仿真结果.结果表明,同频干扰的存在使得系统性能大幅下降,多用户分集和并行中继选择可以改善受同频干扰的射频技术/自由空间光通信系统的性能.具体来说,多用户分集提高了射频路径的性能,而并行中继选择提高了系统的整体性能.系统行为由两个链路中性能最坏的一个所主导.因此,在工程应用中分析定位性能不足的链路并提升其性能是提升整个系统性能的关键.

关键词: 射频技术/自由空间光通信系统, 同频干扰, 多用户分集, 并行中继选择, Kappa-mu/M分布

Abstract:

In this paper, we investigate the co-channel interference(CCI) radio frequency(RF)/free space optical(FSO) system with multiuser diversity and relay selection. We use the hybrid Kappa-mu/M distribution statistical model that can represent most channels. The Meijer G analytical expressions and approximate asymptotic expressions of the outage probability are derived. The effects of key factors such as channel fading, pointing error, CCI, user selection, and parallel relay selection on the outage performance are analyzed through simulation analysis expressions and asymptotic expressions. Further analysis of the asymptotic results in the high signal-to-noise ratio(SNR) regimes gives the diversity order of the system. Monte Carlo simulation results are generated to verify the validity of the analytical expression. The results show that CCI is the main factor that decreases the system performance. Multiuser diversity and relay selection can improve the performance of RF/FSO system with CCI. Multiuser diversity improves the performance of the RF path, while relay selection improves the overall performance of the system. System behavior is dominated by the worst-performing of the two links. Therefore, locating links with insufficient performance and improving their performance is the key to improving the performance of the entire system in engineering applications.

Key words: radio frequency/free-space optical system, co-channel interference, multiuser diversity, parallel relay selection, Kappa-mu/M distribution

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