资源描述:
《瑞利衰落信道的MATLAB仿真【毕业论文】》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、本科毕业设计(20届)瑞利衰落信道的MATLAB仿真摘要在无线通信信道环境中,电磁波经过反射折射散射等多条路径传播到达接收机后,总信号的强度服从瑞利分布。同时由于接收机的移动及其他原因,信号强度和相位等特性又在起伏变化,故称为瑞利衰落。信息技术的快速发展,使得通信系统在性能不断提高的同时也变得越来越复杂。正因为如此,采用传统技术对通信系统进行分析和设计的日子一去不复返,而由于计算机仿真方法的廉价性、高效性和灵活性,使其成为了通信系统中的主要设计和分析手段之一。matlab仿真就是是无线通信系统实验中
2、常用的一种仿真技术。论文主要讲述了瑞利衰落信道的概念以及各种衰落类型分类和它们的各种特性:频率特性、时域特性、角度特性。同时根据瑞利衰落的各种特性提出了两种克服技术即OFDM技术和MIMO技术,同样论文对这两种技术的原理进行了具体介绍。论文还阐述了matlab仿真的概念和在各种领域的应用。主要叙述了如何用matlab对瑞利衰落信道进行仿真,以及仿真的各项流程,同时对信道的各个模块代码如何运行进行了具体解析,最后给出仿真结果图。关键词:瑞利衰落信道;Matlab仿真;无线通信
AbstractInw
3、irelesscommunicationchannelenvironment,electromagneticwavepassesreflectionrefractionscatteringetcmultiplepaths,alwaysarrivereceiverspreadaftertheintensityofthesignaloftheobeyRayleighdistribution.Andbecausethereceivermobileandotherreasons,signalstrength
4、andphasefluctuationcharacteristicsandinsocalledtheRayleighfading.Therapiddevelopmentofinformationtechnology,makesthecommunicationsysteminunceasingenhancementwhileperformanceisalsobecomingmoreandmorecomplicated.Becauseofthis,adoptsthetraditionaltechnolo
5、gyofcommunicationsystemanalysisanddesigndaysgone,andbecausecomputersimulationmethodofcheapsex,efficiencyandflexibility,causedittobecomethemaindesignforcommunicationsystemandanalyticalmeansone.Matlabsimulationexperimentiswirelesscommunicationsystemusedi
6、nasimulationtechnology.ThegraduationdesignmainlyintroducestheconceptofRayleighfadingchannel,andvarioustypesofclassificationandtheirdeclineofvariouscharacteristics:frequencycharacteristics,time-domainfeatures,Anglecharacteristics.Andaccordingtothevariou
7、scharacteristicsofRayleighfadingpresentstwoovercometechnicalnamelyOFDMtechnologyandMIMOtechnology,alsothepapersontheprincipleofthetwotechnologiesareintroduced.Thispaperexpoundstheconceptandthesimulationofmatlabinvariousfieldsofapplications.Mainlydescri
8、beshowtomatlabtoRayleighfadingchannelaresimulated,andthesimulationoftheprocess,andhoweachmodulecodechanneloperation,andfinallygivesthespecificanalyticalsimulationresultdiagram.KeyWords:Rayleighfadingchannel;Matlabsimulation;wirelesscomm