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1、ChannelStructure2002.3.spadent@sktelecom.comProprietaryOverviewßTermsüRS(RateSet)-RS1:9.6Kbps-RS2:14.4KbpsüSR(SpreadingRate)-SR1:DS-CDMAof1.25MHz(1.2288Mcps)-SR3:5MHz(3.6864Mcps)üRC(RadioConfiguration)-RC1=RS1IS-95compatiblemode-RC2=RS2IS-95compatiblemode-Rever
2、seLink:RC3~4:CDMA20001xmodeRC5~6CDMA20003xmode-ForwardLink:RC3~5CDMA20001xmodeRC6~9CDMA20003xmodeüRCCoupling(RL-FL)-RC1-RC1,RC2-RC2,RC3-RC3orRC4,RC4-RC5RC3orRC5-RC6orRC7,RC4orRC6-RC8orRC9ProprietaryOverviewßKeyDesignCharacteristics(1/3)üBackwardcompatibilitywit
3、hIS-95A/BüChiprate=Nx1.2288Mcps(N=1,3)üDataRatesupto307.2kbps(1X,N=1)or1.0368Mbps(3X,N=3)üBasicframelength=20ms-5ms,10ms,40ms,80mssupportedüIncreasedperformanceandcapacity–Fastforwardandreversepowercontrol•800Hzpowercontrol•powercontrolsubchannelpuncturedinreve
4、rselinkpilotchannel–Forwardtransmitdiversity•OTD(OrthogonalTransmitDiversity)•STS(SpaceTimeSpreading)•3xMCdiversityantenna–ImprovedconvolutionalcodeandTurbocode•reverselink:rate1/2,1/3,1/4•forwardlink:rate1/2,1/3,1/4,1/6(convolutionalcodeonly)–Coherentpilotbase
5、dreverselinkProprietaryOverviewßKeyDesignCharacteristics(2/3)üAuxiliarypilot-Beamforming-OrthogonalitywithcommonpilotüForwardWalshcode-NumberofWalshcodeisdoubledbyQPSK-QOF(Quasi-OrthogonalFunction)•Providesincreasednumberofchannelsinforwardlink•Generatedbymaski
6、ngWalshfunctionsüEfficientpackettransmission-Variabledatarate•Dataratecanbevariedduringtransmission-Flexibledatarate•Supportsanynumberofinformationdatarate-DCCH(DedicatedControlCH)-Multi-FrameInterleaving•ToincreaseinterleavingperformanceProprietaryOverviewßKey
7、DesignCharacteristics(3/3)üBatterypowersaving–QPCH(QuickPagingChannel)–HPSK(HybridPSK)ReverselinkonlyReducepeaktoaverageratio–DCCH(DedicatedControlCH)pilotgating•DTX(DiscontinuousTransmission)isallowedfordataservice•DuringDTXoff,onlythereverselinkpilotistransmi
8、ttedandcanbegatedon/off–Reverselink1/8rateFCHgating•When1/8rate,transmissioncanbeon/off–Enhancedaccesspreamblegating–CommoncontrolchannelpreamblegatingProprietaryOverviewßDi
