文档名:GGD弱湍流环境含零视轴指向误差中继UWOC系统中断概率分析
摘要:为克服传统水下弱湍流模型无法准确拟合实测数据的缺陷,选取经实验测试验证的广义Gamma分布(GeneralizedGammaDistribution,GGD)来表征弱海洋湍流,并基于此提出综合考虑了GGD弱湍流、零视轴指向误差,以及无衰落信道冲激响应(FadingFreeImpulseResponse,FFIR)所表征的隐路径损耗和多径效应的新聚合衰落信道模型.接下来,利用Meijer-G函数推导出综合了GGD弱湍流与零视轴指向误差的混合衰落概率密度函数闭型表达,并据此分别推导出并行和串行中继水下无线光通信(UnderwaterWirelessOpticalCommunication,UWOC)系统中断概率的理论闭型公式.最后,则利用MonteCarlo数值仿真验证了上述推导的中断概率闭型表达的正确性,并考察不同系统核心参数的选择对中断概率的影响.研究结果表明:中继节点的引入可以有效降低长距离传输时UWOC系统的中断风险;而中继节点数、接收机孔径尺寸、入射光轴抖动方差等参数的选取,皆会对系统的中断性能产生重要影响.此外,光源发散角增大导致的FFIR时延扩展将引发严重的符号间干扰,进而导致系统中断概率普遍下降1~3个数量级.
Abstract:Inordertoovercometheshortcomingofthetraditionalunderwaterweakturbulencemodelthatcannotac-curatelyfitthemeasureddata,thegeneralizedgammadistribution(GGD)whichhasbeenverifiedbyseriesoflaboratoryex-perimentsischosentocharacterizetheweakoceanicturbulence.Basedonthis,anewaggregatedfadingchannelmodelisproposed,whichtakesintoaccounttheGGDweakturbulence,zeroboresightpointingerror,andtheimplicitpathlossandmultipathpropagationeffectcharacterizedbyfadingfreeimpulseresponse(FFIR).Next,aclosed-formexpressionofthehybridfadingprobabilitydensityfunctionintegratingtheGGDweakturbulenceandzeroboresightpointingerrorisderivedusingthehighertranscendentalMeijer-Gfunction,andthen,thetheoreticalclosed-formexpressionsfortheoutageprobabil-itiesoftheparallelandserialrelayingunderwaterwirelessopticalcommunication(UWOC)systemsarederivedaccording-ly.Finally,MonteCarlosimulationsareprovidedtoverifythecorrectnessoftheabove-derivedanalyticalformulasfortheoutageprobabilityandtoinvestigatetheeffectofdifferentsystemcoreparametersonoutageperformanceofthesystems.TheresultsshowthattheintroductionofrelaynodescaneffectivelyreducetheoutageriskofUWOCoverlongdistances.Incontrast,thenumberofrelaynodes,receiveraperturesize,incidentopticalbeamjittervariance,andotherparameterscanaffecttheoutageperformance.Inaddition,theFFIRdelayspreadcausedbyincreasingofthedivergenceangleofthelightsourcewillleadtoseriousinter-symbolinterference,whichwillresultinageneraldecreaseof1~3ordersofmagnitudeintheoutageperformanceoftherelayingUWOCsystems.
作者:张馨文 李岳衡 江雨薇 居美艳 黄平Author:ZHANGXin-wen LIYue-heng JIANGYu-wei JUMei-yan HUANGPing
作者单位:河海大学,江苏南京211100
刊名:电子学报 ISTICEIPKU
Journal:ActaElectronicaSinica
年,卷(期):2023, 51(11)
分类号:TN929.3
关键词:广义Gamma分布 弱海洋湍流 指向误差 中继 中断概率 水下无线光通信
Keywords:generalizedgammadistribution weakoceanicturbulence pointingerror relay outageprobability underwaterwirelessopticalcommunication
机标分类号:TN929.1TP242TP391.9
在线出版日期:2024年2月1日
基金项目:GGD弱湍流环境含零视轴指向误差中继UWOC系统中断概率分析[
期刊论文] 电子学报--2023, 51(11)张馨文 李岳衡 江雨薇 居美艳 黄平为克服传统水下弱湍流模型无法准确拟合实测数据的缺陷,选取经实验测试验证的广义Gamma分布(GeneralizedGammaDistribution,GGD)来表征弱海洋湍流,并基于此提出综合考虑了GGD弱湍流、零视轴指向误差,以及无衰落信道冲激...参考文献和引证文献
参考文献
引证文献
本文读者也读过
相似文献
相关博文
GGD弱湍流环境含零视轴指向误差中继UWOC系统中断概率分析 Outage Analysis for Relay-Aided Underwater Wireless Optical Communication over GGD Weak Turbulence with Pointing Errors
GGD弱湍流环境含零视轴指向误差中继UWOC系统中断概率分析.pdf
- 文件大小:
- 2.12 MB
- 下载次数:
- 60
-
高速下载
|
|