欢迎来到天天文库
浏览记录
ID:28858748
大小:8.69 MB
页数:71页
时间:2018-12-14
《基于混沌压缩感知的cs-dcsk uwb无线通信系统的研究》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、摘要11万方数据厦门大学硕士学位论文AbstractUltra-wideband(UWB)wirelesscommunicationsystemshavelotsofadvantagesininformationtransmissionrate,anti-multipathfadingandreutilizationoffrequencyspectmmresource.Withitsinherentwide-bandpropertyande缴togenerate,chaoticsignalhasnaturallybeenusedinUWBwi
2、relesscommunicationsystems.ChaoticUWBsystemsusechaoticdigitalmodulationtechnologies,whichutilizeschaoticsignalsascarriers,totransmitinformation,andthesystemshavedemonstratedtheiradvantagesincost,powerconsBmeandanti—interference.Amongallthechaoticdigitalmodulationtechnologie
3、s,Code—ShiftedDifferentialChaosShiftKeyinghasdrewmuchattentionrecentyearsandbeenusedinUWBsystems.Nyquistsamplinglawplaysanimportantroleindigitalsignalprocessing,andtakesanindeh'bleeffectintheprogressofscienceandtechnology.Withtheincreaseofdesireofhumanbeingsonlargedataandhi
4、ghcommunicationrate,thebandofsignalhasbeenincreasingHowever,accordingtothetraditionalNyquistsamplinglaw,thesamplingrateofchaoticUWBsystemswillbeextremelyhishwhichwillgiveheavypressuretoanalog-to—digitalconvertor(ADC)ofreceiversideontechnicalrealization,costandpowerconsume.T
5、hisproblemwillbeabarrieronthefunctionizationofwell-performedchaoticUWBsystems.Theemergeofcompressedsensingbringsarevolutioninsignalprocessingfield.Sub-NyquistreceiversbasedontheideaofcompressedsensinghasbeenprovedtobefeaslSleinotherwide-bandcommunicationareas.Asaresult,expl
6、oringthecombinationofchaoticUWBsystemandcompressedsensingwillmaketheadvantagesofchaoticUWBsystembeenfurtherused.Firstly,thispaperwillanalyzethedoublesparsityofCS-DCSKbasedchaoticUWBsystem,thenwewillredesignthetraditionalCS-DCSKreceiverbasedonthestructureofitsWalshcodes.Ther
7、edesignofitwillmakeitsimplerandfitfortheideaofcompressedsensingreceiver.Wethenprovetheequalityinbiterrorrate(BER)performanceofthenewreceiverandthetraditionaloneOVerAWGNchannels.Inaddition,weanalyzetheBERperformanceofthenewreceiverOVerUWBchannel.TⅡ万方数据AbstractSecondly,basedO
8、IltheredesignedCS·DCSKreceiverabove,weproposetwosub-NyquistreceiversforCS-DCSKUWBs
此文档下载收益归作者所有