本科学生毕业设计(论文)外文翻译

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1、吉林化工学院信息与控制工程学院毕业设计（论文）外文翻译设计（论文）中文题目：基于Matlab数字调制系统仿真EnglishTitle：CommunicationsystemsimulationbasedonMatlabdigitalmodulation学生学号：075320213学生姓名：曲立南专业班级：电信0702指导教师：郝富春职称：副教授起止日期：2010.3.1～2010.3.26吉林化工学院JilinInstituteofChemicalTechnology吉林化工学院信息与控制工程学院毕业设计（论文）外

2、文翻译1原文Inrecentyears,ourmoblecommunicationserviceswiftandviolentdevelopment,penetratedintosociallifeeachaspect,facingthemotionusergroupcontinuallygrowthandnewserviceemergingoneafteranotherincessantly,themobilecommunicationsystemmustadaptpromptlyeveninadvanceint

3、hemarketdemandstep.Buttookofadigitalmodulatingtechnologymodulatingtechniquemobilecommunicationsystemimportantguarantee.Thedigitalmodulationdemodulationtechnolagyholdstheextremelyimportantstatusinthedigitalcommunication,thecommonlyuseddigitalmodulationincludes:

4、Frequencyshiftkeying(FSK)andphase_shiftkeying(PSK)andsoon.Atpresenthasusedinthemobilecommunicationsystemthemodulatingtechnologymodulatingtechniquebeingpossibletodivideintotwobigkinds:Thelinearmodulatingtechnologyandthepermanentenvelopingmodulatingtechnologymod

5、ulatingtechniquelinearmodulationtechologymainlyhas:PSK-BPSK、QPSKOQPSK/4-QPSK、QAM、16QAM、64QAM、256QAM.thepermanentenvelopemodulatingtechnologymodulatingtechniquemainlyhas:MSKTFMGMSK.Thearticleinviewofthethreekindofbasicialmodulationdemodulationtechnologyhascarri

6、edonthedetailedsimulationandtheanalysis,obviously,choosesonekindofmodulatinftechnologymodulatingtechniqueisdeterminedaccordingtothechannelcharacteristicandtheapplication.Thepowerefficiencyandthefrequencyspwcturmeffciencycannotbesatisfactorytobothsidesgenerally

7、unevenAmerica.Thehighfrequencyspecteumefficiencyneedstosacrificecertainpowereffciencytoobtain;Similarly,thehighpowerefficiencyalsoneedstosacrificecertainfrequencyspecteumsfficiency.Alongwiththemodulationtechniqueintheunceasingdevelopment,thenewmodulatingtechno

8、logymodulatingtechniquemighebeingthebetterfrequencyspectrumefficiencyandthehigherpowerefficiency.FSKandPSKinthenumeralmoiblecommunicationthefindapplication,inwhichFSkalreadyobtaine