通信工程毕业设计（论文）外文翻译-扩频通信系统及matlab仿真

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1、华科学院HUAKEINSTITUTEOFTAIYUANUNIVERSITYOF SCIENCE&TECHNOLOGY外文翻译题目：扩频通信系统及MATLAB仿真学生姓名学号班级通信072201H所属院（系）电子信息工程系指导教师2011年6月SpreadSpectrumCommunicationSystemandMATLABSimulationABSTRACTThisthesisexpoundsthebasicprinciplesofspreadspectrumcommunication,andthenthearticlemainlyactsaccordingtotheShannontheo

2、remandtanoakCzechoslovakiayouNepalmaythehusbandlatentantijammingtheory,WiththeaidofMatLabtoolboxandMonteCarlosimulationalgorithm,ithasestablishedthedirectsequencespreadspectrumcommunicationssystemsimulationmodelwhichdoesnothavewhenthedisturbancethroughtheanalysiserrorratesimulationcurveandtheorypre

3、dictedvalue,hadprovenconstructsthesimulationmodeltheaccuracy.Keywords：Spreadspectrum；communication；MATLAB1Introduction1.1SpreadSpectrumCommunicationSystemSpreadspectrumcommunication,namely,spreadspectrumcommunications(SpreadSpectrumCommunication),withfiber-opticcommunications,satellitecommunication

4、s,withaccesstotheinformationageasthethreemajorhigh-techcommunicationstransmission.Spreadspectrumcommunicationistosendtheinformationtobepseudo-randomdataiscoded(spreadspectrumsequence:SpreadSequence)modulation,spreadspectrumandthentherealizationoftransmission;thereceivingendisusingthesamemodemcodean

5、drelatedprocessing,therestorationoftheoriginaldata.Spreadspectrumcommunicationsystemhasthreemaincharacteristics.Carrierisanunpredictable,orso-calledpseudo-randombroadbandsignal.Carrierdatabandwidththanthemodulationbandwidthismuchwider.Receivingprocessisgeneratedbylocalbroadbandcarriersignalandrecei

6、vingacopyofthesignaltothebroadbandsignaltoachieve.Themainwayofspreadspectrumareasfollows:DirectSequenceSpreadSpectrum(DSSS)usinghigh-speedpseudo-randomcodeontothelow-speeddatatransmissionspreadspectrummodulation;Frequency-hoppingsystemusingpseudo-randomcodetocontrolthecarrierfrequencyinawiderbandof

7、thechange;THisthedatatransmissiontimeslotisapseudo-random;Chirpfrequencysystemisalinearextensionoftheprocessof-19-change.Combinationofanumberofwaysofhybridsystemsareoftenapplied.Themostimportantmeasureofspr