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1、ABSTRACTRESEARCHANDMODELINGOFUWBWIRELESSCOMMUNICATIONSYSTEMSubject:Circuits&SystemsName:LiuChang-longSignature:Tutor:YuNing-meiSignature:NiuLan-qiSignature:Data:Feb-06ABSTRACTUWBisalreadybecamesahotspotinwirelesscommunicationfieldresearchanddevelopementgradually;moreover,ithasbeenregard
2、edasoneofthekeytechnologiesinwirelesscommunicationofthenextgeneration.UWBwirelesscommunicationcanmaydivideintotwotypes:OneisbasedonImpulseRadiotechnique,theothertechniquesisbasedoncarriermodulation.Thelatterhasmanyvariousrealizationschemes,DS-CDMAandMB-OFDMisthemostlyschemes.Asanimporta
3、ncecandidateofschemes,MB-OFDMhasexcellentperformanceinmanyaspects,suchasutilizationrateofspectrum,coexistencewithothernarrowbandsystem,interferencerejectionetc.SoMB-OFDMUWBtechnologyisthemajorresearchofthispaper.ThePOFDMsystemwithKparameterhasbeenputforwardmainlyinthispaper;somecrucialt
4、echnologiessuchassynchronoustechnology，equalizationtechnology,channelestimationaswellastheOFDMsignal’sPARAreductionalgorithmetchavebeenstudiedbasedonOFDMmodulationsystem.ThesealgorithmshavestillbeensimulatedtocompareandselectetosuitforMB-OFDMUWBsysteminIEEEindoorwirelesschannelmodel.Ana
5、lysisshowsthatphaseequalizerandcombinedchannelestimationisthechoicenessalgorithmsuitforthissystem.Mode1(3frequencybandpatterns)fortheUWBsystemwhichdescribesinthispaperhasbeenmodeledandsimulatedonMATLAB7.0platform,parametersofbasebandwerestrictstipulatedaccordingtoIEEE802.15.3protocal,ch
6、annelpartadoptsthestandardchannelissuedbythechannelworkinggroupofIEEE,whichisusedtocomparevariousPHYschemes,frequencyhoppingtechnologyandchannelestimatealgorithmectwhichanalysedinChapter4haveadoptedinthesimulation.Simulationisatthespeedof200MbpspatternundertheconditionofsetingupeachOFDM
7、symbolnumberfor60,actualdataspeedis177.78Mbps,theutilizationrateoffrequencybandis0.3367,thoughtincreasingusefuldatasub-carrierandraisingcodingspeedorreducetheprefixofcirculatingandthelengthofguardintervalaswellasthetrainningsequencelengthmayraisetheutilizationrateoffrequencyban
