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1、-万方数据----Subject：KeyTechnologyResearchBasedonLTE-AuplinkSpecialty：SignalandInformationProcessingName：ZhouWenyuan（Signature）Instructor：ZengZhaohua（Signature）ABSTRACTAsasmoothevolutionofLTE,theLTE-Advancedhassomeobviousimprovementsintermsofdatatransmission,frequencyspectrumut
2、ilization,systemcapacityandpeakrate.Atthesametimeitismoreinlinewiththerequirementsof4G,whichhasbeenwidespreadattentionandrecognitionintheworld.ThebackwardofLTE-AcompatibleswithLTEversions,sousingthesamekeytechnologyLTEphysicallayerandsubstantiallythesameastheLTEsystemarchit
3、ecture.(1)ThisThesisintroducesthebackgroundofstartingLTE-Aandthenewkeytechnology.Nextintroducingresearchstatusofthechannelestimation,inter-cellinterferencecancellationandfrequencyoffsetestimation.ThentheLTE-Aphysicallayerprotocolsareintrodused,includingtwoframestructureofth
4、esystem,theuplinkslotstructureandtheprinciplesoftheuplinkSC-FDMAtechnology,etc.,whichlaidthetheoreticalfoundationforthestudyofthesubsequentcontent.(2)thispaperbuildsalinksimulationplatform,describingthesetingofcommonparametersandfunctionofmainmodules,whichcontaintheGUIinter
5、face,bitgenerationmodule,channelmodule,channelestimationmoduleandfrequencyoffsetestimationmodule,etc.Meanwhile,theprinciplesofinter-cellinterferencecancellationmoduleusingtheMRCandIRCtwoalgorithmswereintroduced,andverifiedtheperformanceofthetwoalgorithmsbysimulation,gotther
6、thresholdtomakeswitchingbetweenthistwomethods,timelyadoptionofMRCalgorithm,otherwiseusingIRCalgorithm.Finallyitisconcludedthatswitchingmethodisvalidatedbysimulationcanmeetthesystemrequirements.(3)Analysisoftheplatformchannelestimationmodule.Firstly,thepaperintroducestheprin
7、cipleoftwochannelestimationalgorithmbasedonpilotandverifiestheperformancebysimulation,obtainingthetime-domaincorrelationalgorithmisalwaysbetterthantheLS.Then,proposingimprovedtime-domaincorrelationmethodinthefrequencydomainwindowingandtime-domaincorrelationmethodinDCTdomain
8、forthespectralleakageproblems,andsimulationshowedthattheimprovedalgorithmcanwellsu
