陈晓;胡晓英;

• 1:上海申核能源工程技术有限公司

摘要(Abstract)：

对数正态信道是描述弱湍流条件下无线光通信衰落的有力数学工具。然而精确的对数正态信道性能表达式带有无法化简的多重积分,难以揭示信道参数和性能的联系,不利于性能估计。针对该问题,Wilkinson和Fenton近似被广泛应用于对数正态信道的性能分析,但Wilkinson和Fenton近似的应用范围却缺乏标准,这导致了系统设计时对理论性能的错误预判。为此,文章基于原点矩的积分表达式讨论了Wilkinson和Fenton近似的特点,提出了基于Wilkinson和Fenton近似来估计自由空间光通信中继性能的方法,对比了Wilkinson和Fenton近似在此类性能分析中的适用范围。仿真结果表明,在中低信噪比情况下,Wilkinson比Fenton近似更准确;在高信噪比情况下,Fenton比Wilkinson近似更精确。此外,仿真结果还表明,Wilkinson近似方法的精度和对数正态信道的方差密切相关。

关键词(KeyWords)： 自由空间;激光通信;性能分析;湍流信道;对数正态信道

Abstract:

Keywords:

基金项目(Foundation): 国家重大专项大型先进压水堆及高温气冷堆核电站—CAP1400核电厂智能运维关键技术研究资助项目(2019ZX06002022)

作者(Author): 陈晓;胡晓英;

Email:

DOI: 10.13756/j.gtxyj.2021.01.012

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