LTE物理层综合介绍

UNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()AComprehensiveAnalysisOfLTEPhysicalLayerMasterofScienceThesisFahimehRezaeiSupervisor:Dr.HamidSharif-Kashani,Dr.MichaelHempelDepartmentofComputerandElectronicsEngineeringUniversityofNebraska-LincolnDecember,1st2010UNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()Outline•Background•LTEGeneralArchitecture•ThesisObjectiveandMotivation•LiteratureReview•LTEPhysicalLayerCharacteristics•PerformanceStudyApproach•SimulationResultsandAnalysis•SummaryandConclusionUNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()BACKGROUNDLTEGENERALARCHITECTURETHESISOBJECTIVEANDMOTIVATIONLITERATUREREVIEWLTEPHYSICALLAYERCHARACTERISTICSPERFORMANCESTUDYAPPROACHSIMULATIONRESULTSANDANALYSISSUMMARYANDCONCLUSIONUNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()Background•Standarddevelopers:3GPP,IEEE,and3GPP2•3rdGenerationStandards:•LongTermEvolution(LTERelease8)•802.16e(WiMAX),802.16m•UMB•4thGenerationstandards•SatisfyIMT-AdvancedRequirements:100Mbpsinhighmobility(300km/h)and1Gbpsinlowmobility(3km/h),lessthan5msDataLatency,…UNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()LTERelease8GeneralFeatures•PacketSwitchedNetwork•OFDMinDownlinkandSC-FDMAinUplink•DuplexSchemes:TDDandFDD•AdoptiveModulationandCodingscheme(QPSK,16-QAM,64-QAM)•MultipleAntennaTechniques–TransmitDiversity–SingleUserMIMO–MultiUserMIMO–Close-Looprank1precoding–dedicatedbeamforming•SystemBandwidthfrom1.4MHzto20MHz(1.4,3,5,10,15,20)UNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()BACKGROUNDLTEGENERALARCHITECTURETHESISOBJECTIVEANDMOTIVATIONLITERATUREREVIEWLTEPHYSICALLAYERCHARACTERISTICSPERFORMANCESTUDYAPPROACHSIMULATIONRESULTSANDANALYSISSUMMARYANDCONCLUSIONUNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()GeneralArchitectureLongTermEvolutionassociatedwithradioaccesstechnologySystemArchitectureEvolution(SAE)associatedwiththecorenetwork•LTEarchitecture-EPS:•E-UTRAN(EUTRANode)-LTE•EPC(EvolvedPacketCore)-SAEUNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()UserPlaneandControlPlaneProtocolStacksUNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()BACKGROUNDLTEGENERALARCHITECTURETHESISOBJECTIVEANDMOTIVATIONLITERATUREREVIEWLTEPHYSICALLAYERCHARACTERISTICSPERFORMANCESTUDYAPPROACHSIMULATIONRESULTSANDANALYSISSUMMARYANDCONCLUSIONUNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()ThesisObjectiveandMotivations•Arethesevaluesaccurateorevencorrect?•Istherightapproachusedforgettingproposedvaluesandresults?•Inwhichconditionsandscenariospresentedvaluesandresultsarevalid?UNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()ThesisObjectiveandMotivations,cnt.•Providetherightapproachforevaluationofphysicallayerperformance•Provideaperformancestudythatincludesallpossiblescenarioswhichisaddressesby–Differentantennadiversitymodes–Differentmodulationschemesandcoderates–IncludebothFDDandTDDoperations–IncludeallchannelbandwidthsUnderstandingtheperformanceevaluationapproachesusedbefore(LiteratureReview)ProfoundunderstandingofPhysicallayerStructuretodetermineresourceallocationusedfordataandcontrolinformationtransmission(LTEPhysicalLayerConfiguration)Implementingthephysicallayerproceduretoprovideanaccuratesimulationmodel(Performancestudyapproachandsimulationresults)UNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()BACKGROUNDLTEGENERALARCHITECTURETHESISOBJECTIVEANDMOTIVATIONLITERATUREREVIEWLTEPHYSICALLAYERCHARACTERISTICSPERFORMANCESTUDYAPPROACHSIMULATIONRESULTSANDANALYSISSUMMARYANDCONCLUSIONUNIVERSITYOFNEBRASKA–LINCOLNCOLLEGEOFENGINEERINGAdvancedTelecommunicationsEngineeringLaboratory()LiteratureReview•J.J.Sánchez,D.Morales-Jiménez,G.Gómez,J.T.Enbrambasaguas,“PhysicalLayerPerformanceofLongTermEvolutionCellularTechnology”,16thISTMobileandWirelessCommunicationsSummit,2007.–ThispapermainlyfocusesonoutliningtheimpactofdifferentfeaturesofLTEonperformance.However,atthetimeofthispublication,somecharacteristicsofLTEwereunderdevelopment,e.g.,channelcodingandratematching,4x4MIMO.•D.M.Sacristán,J.Cabrejas,D.Calabuig,J.F.Monserrat,InstituteofTelecommunicationsandMultimediaApplications,“MACLayerPerformanceofDifferentChannelEstimationTechniquesinUTRANLTEDownlink”,69th,IEEE,VTC–Performancestudyislimitedtodownlinktransmission.Simulationresultsarebasedon10MHzsystembandwidth,onetransmitandtworeceiveantenna(SIMO)UNIVERSITYOFNEBRASKA–LIN