FromOFDMandSC-FDEtoESTBasedModulation

FromOFDMandSC-FDEtoESTBasedModulationProfessorGeoffreyYeLiSchoolofElectricalandComputerEngineeringGeorgiaInstituteofTechnology,USAContentsOverviewofmyResearchOrthogonalFrequencyDivisionMultiplexing(OFDM)Single-CarrierwithFrequency-DomainEqualization(SC-FDE)EnergySpreadingTransform(EST)basedModulationforFrequency-SelectiveChannels•WhyEST?•SpreadinginTimeandFrequencyDomain•SystemDescription(Hard/SoftDecision)•PerformanceAnalysis•SimulationResultsExtensiontoMIMOSystemsExtensiontoDoublySelectiveChannels2ContentsOverviewofmyResearchOrthogonalFrequencyDivisionMultiplexing(OFDM)Single-CarrierwithFrequency-DomainEqualization(SC-FDE)EnergySpreadingTransform(EST)basedModulationforFrequency-SelectiveChannels•WhyEST?•SpreadinginTimeandFrequencyDomain•SystemDescription(Hard/SoftDecision)•PerformanceAnalysis•SimulationResultsExtensiontoMIMOSystemsExtensiontoDoublySelectiveChannels3MIMO-OFDM•ChannelestimationforMIMO-OFDMsystemwithalargenumberoftransmitantennasunderhighmobilityenvironments•SignaldetectionforMIMO-OFDM:Complexityperformancetrade-off•TransmissionwithpartialCSI•Interferenceavoidanceandsuppression•Multi-userMIMO•VariousapplicationsincurrentstandardsandsystemsCross-LayerOptimizationCentralizedOptimization:•HowtoperformoptimizationwithpartialCSI?•ImpactofMIMOoncross-layeroptimizationperformance?•InterferencesuppressionandavoidanceincellularsystemsDe-centralizedOptimization:•SchedulingwithlimitedCSI•Stabilityregionofmulti-carriernetworks•EnergyefficiencytransmissionCognitiveRadioMIMOOFDM(A)basedcognitivenetworksCooperativespectrumsensingformobilenetworksDynamicspectrumallocationCross-LayerissuesinCRnestworksOFDMforWirelessCommunications:ChannelEstimationY.(G.)Li,L.J.Cimini,Jr.,andN.R.Sollenberger,“RobustchannelestimationforOFDMsystemswithrapiddispersivefadingchannels,”IEEETrans.Commun.vol.46,pp.902-915,July1998.(Googlecitation:488)Y.(G.)Li,“Pilot-symbol-aidedchannelestimationforOFDMinwirelesssystems,’’IEEETrans.Veh.Tech.,vol.49,pp.1207-1215,July2000.(Googlecitation:262)OFDMforWirelessCommunications:Co-ChannelInterferenceSuppressionY.(G.)LiandN.R.Sollenberger,“AdaptiveantennaarraysforOFDMsystemswithco-channelinterference,”IEEETrans.Commun.,vol.47,pp.217-229,Feb.1999.(Googlecitation:142)BASESTATIONRDMIMO-OFDM:ChannelEstimationandTrainingSequenceDesignY.(G.)Li,N.Seshadri,andS.Ariyavisitakul,“ChannelestimationforOFDMsystemswithtransmitterdiversityinmobilewirelesschannels,”IEEEJ.SelectedAreasCommun.,vol.17,pp.461-471,March1999.(Googlecitation:417)Y.(G.)Li,“SimplifiedchannelestimationforOFDMsystemswithmultipletransmitantennas,’’IEEETrans.onWirelessCommun.,vol.1,pp.67-75,Jan.2002.(Googlecitation:263)FirstMIMO-OFDMSystem!!!MIMO-OFDM:MoreTransmitandReceiveAntennaSystemY.(G.)Li,J.H.Winters,andN.R.Sollenberger,“MIMO-OFDMforwirelesscommunications:signaldetectionwithenhancedchannelestimation,”IEEETrans.Commun.,vol.50,pp.1471-1477,Sept.2002.(Googlecitation:262)G.L.Stuber,J.Barry,S.McLaughlin,Y.(G.)Li,M.A.Ingram,andT.Pratt,“BroadbandMIMO-OFDMwirelesscommunications,”Proc.ofIEEE,vol.92,pp.271-294,Feb.2004.(Googlecitation:355)MIMO-OFDM:PerformanceImprovementbyPre-ProcessingDataInputDemultiplexerModulatorModulatorStatisticalLayerRateAllocationChannelEncoderChannelEncoderJ.Du,Y.(G.)Li,D.Gu,A.Molisch,andJ.Zhang,“Statisticalrateallocationforlayeredspace-timesystem,”toappearinIEEETrans.Commun.,vol.55,no.3,pp.489-496,March2007.Cross-LayerOptimizationforStreamingTraffic:TheoreticalFrameworkContinuousfrequencyDiscretesubcarriersG.-C.SongandY.(G.)Li,“Cross-layeroptimizationforOFDMwirelessnetworks–PartIandPartII,”IEEETrans.WirelessCommun.,vol.4,no.2,pp.614–634,March2005.(Googlecitation:120+72)Cross-LayerOptimizationforBestEffortTrafficG.Song,Y.(G.)Li,andL.J.Cimini,Jr.,“Jointchannel-andqueue-awareschedulingformultiuserdiversityinwirelessmulticarriernetworks,”toappearinIEEETrans.Commun.Cross-LayerOptimization:MoreWhathappensifanetworkhasdifferenttypesoftraffic?G.-C.SongandY.(G.)Li,“Utility-basedresourceallocationandschedulinginOFDM-basedwirelessnetworks,”IEEECommun.Mag.,vol.43,no.12,pp.127-135,Dec.2005.Howtoevaluateperformancetheoretically?G.-C.SongandY.(G.)Li,“Asymptoticthroughputanalysisforchannel-awarescheduling,”IEEETrans.Commun.,vol.54,no.10,pp.1827-1834,Oct.2006.StabilityofCSIawarerandomaccess?G.Ganesan,Y.(G.)Li,andFrederickW.Vook,“StabilityregionofmulticarrierchannelawareAloha,”IEEETrans.Inf.The.,vol.53,no.9,pp.3212-3218,Sept.2007.CognitiveRadio:CooperativeSpectrumSensing:Licenseduser:CognitiveuserCognitiveusersshouldnotcauseinterferencetolicensedusersPrimary•G.GanesanandY.(G.)Li,“Cooperativespectrumsensingincognitiveradio:PartI:twousernetworks,”IEEETrans.WirelessCommun.,vol.6,pp.2204-2213,June2007.•G.GanesanandY.(G.)Li,“Cooperativespectrumsensingincognitiveradio:PartII:multiusernetworks,”IEEETrans.WirelessCommun.,vol.6,pp.2214-2222,June2007.•G.Ganesan,Y.(G.)Li,B.Bing,andS.-Q.Li,“Spatial-temporalsensingincognitiveradionetworks,”IEEEJ.SelectedAreasCommun.,vol.26,pp.5–12,January2008.ContentsOverviewofmyResearchOrthogon