标签: 082307

Concepts3GPP_082307ConceptsofW-CDMA(UMTS-FDD)AndyYehAgendaCDMAConceptsUMTSNetworkArchitectureW-CDMAProtocolStructureW-CDMABasicPhysicalStructure(PhysicalChannel)DownLinkchannelTransmitDiversityUpLinkchannelUMTS-FDDphysicallayerproceduresHowwillUMTSevolve?Page2MultipleAccessApproachesFrequencyDivisionMultipleAccessTimeDivisionMultipleAccess12N3SpreadSpectrumMultipleAccessCodeDivisionMultipleAccessMultipleTransmittersUser2User1User3andMultipleDataChannelsFrequencyFrequencytimeFrequencyEachUserhasauniquefrequency(1voicechannelperuser)Alluserstransmitatthesametime,butondifferentfrequenciesAMPS,NMT,TACSEachUserhasauniquetimeslotEachDataChannelhasauniquepositionwithinthetim……