硬件referenceCMU200_CDMA

CMU200CDMA测试 CDMA IS95 PhysicallayerForwardlink IS95 PilotChannelTrafficchannelSyncchannelPagingchannelReverselink IS95 ReversetrafficchannelAccesschannel CDMABasics ForwardtrafficchannelgenerationForwardlinkblockdiagramConvolutioncoderRepetitionofthedataInterleavingSignalscramblingwiththelongcodeinformationPowercontrolSpreadingofthesignalwiththeorthogonalWalshcodeQuadraturespreadingandmodulation CDMABasics Powercontrolbit Powercontrol CDMABasics Time msec Normalizedpower dB Mobilereceivedpower BSreceivedpower Closedloopcontrol Openloopcontrol ReversetrafficchannelgenerationForwardlinkblockdiagramConvolutioncoderRepetitionofthedataInterleavingOrthogonalmodulationwiththewalshcodeBurstmanagementSpreadingofthesignalwiththelongcodeQuadraturespreadingandmodulation CDMABasics TothebasebandfiltersandtheQPSKmodulator Pilotchannel ToinitiateacommunicationthemobilesearchsforthePilotchannelinthe Noise tocontrolifaCDMAnetworkisornotavailableatthisfrequency Thisisthesimplestcodechannelofabasestation WalshCode0 andisalwaystransmitted Thisisthestrongest 20 ofradiatedpower codechannelsendsfromthebasestation ThepilotchannelallowsthemobiletoacquiresthetimingoftheForwardchannel aphasereferenceforcoherentdemodulationandsignalstrengthreferencefordeterminingwhentohandoff NoLongCodeandnodata CDMABasics FORWARDLINK Syncchannel WiththeRolloverpoint Timezero ofthepilotPNsequencethemobiledemodulatetheSyncchannelusingWalshcode32 Usedbymobiletosynchronizewiththesystem TheSyncchannelcontinuouslytransmitsamessageevery240ms Themessagecontainsthefollowinginformation PNOffsetSystemTimeandLongCodeStatePagingChanneldescriptionSystem NetworkIDWalshCode32NoLongCodeandnodata CDMABasics FORWARDLINK Pagingchannel WiththePNoffsetoftheSyncchannelitispossibletostartaproperdemodulationprocess ThenwiththerightWalshcodetodemodulatethepagingchannels Sendconfigurationinformationtoallmobiles Channellist Neighbornetworkslist Accessparametersmessages Usedtoacknowledgeorrespondtorequestsmadebymobileswhennotassignedtoatrafficchannelorifrequestedtoassignittoafreetrafficchannel Abasestationmayimplementupto7pagingchannels CDMABasics FORWARDLINK Accesschannel WhenthemobilefindavalidCDMAnetworkitstarttocommunicateswiththebasestationwiththehelpoftheAccesschannel TheBSanswerwithonePagingchannel Usedbymobileto Accesssystemwhennotassignedtoatrafficchannel Originatescalls RespondtopagesRegisterwithsystemTransmitswith4800Bps CDMABasics REVERSELINK Trafficchannel AfterrequestthecommunicationstartonaTrafficChannel simultaneouslyontheForwardandonthereverselink Usedtopassvoice respondtocommandsandrequestsfromthebasestationtothemobile EveryTrafficchannelisassignedwithitsownWalshcode CDMABasics FORWARDLINK CDMAMeasurements RFspectrum CDMAMeasurements Channelgeneration ENCODING INTERLEAVING DE INTERLEAVE DECODE PNSOURCE PNSOURCE DIGITALFILTER DATA WIDEBANDSPECTRUM BACKGROUNDNOISE EXTERNALINTERFERENCE OTHERCELLINTERFERENCE OTHERUSERNOISE DATA9 6kbps 10kHz 1 25MHz 1 25MHz 10kHz 1 25MHz 1 25MHz CARRIER CARRIER CORRELATOR 1 228Mbps 1 228Mbps BPF1 25MHz BPF1 25MHz DATA CDMAMeasurements Overview CDMAMeasurements Gatedoutputpower CDMAMeasurements Openlooppowerresponse CDMAMeasurements Modulation CMU200CDMA测试 CDMA2000 ProtocolRevisionsRev 1IS 95Rev 2IS 95ARev 3IS 95A TSB 74Rev 4TIA EIA 95BminimumrequiredfeaturesRev 5TIA EIA 95BallrequiredfeaturesRev 6CDMA2000Release0Rev 7CDMA2000ReleaseAFutureSteps1xEV DO 1xEX DV CDMABasics RadioConfigurationintheForwardLink CDMABasics ServiceOptions19600bpsvoice 8kQCELP IS 96C29600bpsloopback rateset1 IS 126C39600bpsEVRCvoice 8KEVRC IS 1274Async dataservice circuitswitched IS 995Group3FAXIS 9969600bpsshortmessageserviceIS 637 A7InternetstandardPPPpacketdataIS 6758CDPDoverPPPpacketdataIS 657914400bpsloopback rateset2 IS 126C1414400bpsshor