1xEV-DO根底介绍1
内容概要2
1xEV-DO标准系列空中标准介绍:C.S.0024:cdma2000HighRatePacketDataAirInterfaceStandardsIOS标准:A.S.0001-A:Inter-operabilitySpecification(IOS)forCDMA2000AccessNetworkInterfacesVer2.0:1xEV-DOInteroperabilityforAccessNetworkInterfacesIP标准:P.S.0001:WirelessIPNetworkStandardTIA/EIA/TSB115:WirelessIPNetworkArchitecturebasedonIETFprotocols其他标准:C.S.0029Ver2.0:TestspecC.S.0032:ANMinimumPerformanceSpecC.S.0033:ATMinimumPerformanceSpec3
1xEV-DO信道结构1xEV-DOForwardReversePilotMACTrafficControlReverseActivityBitReversePowerControl(RPC)TrafficAccessPilotMACDataAckPilotDataReverseRateIndicator(RRI)DataRateControl(DRC)DRCLock4
TDM7:1PilotChannel(All0’s)SimplexEncoderCodewordRepetition(Factor=37)PunctureLast3SymbolsSignalPointMapping0?+11?-1Bi-OrthogonalEncoderCodewordRepetition(Factor=2)SignalPointMapping0?+11?-1AWalshCoverWi8,i=0,…,7BBitRepetitionFactor=128SignalPointMapping0?+11?-1CEncoderChannelInterleaverInterleavedPacketRepetitionSignalPointMapping0?+11?-1DW016=(++++++++++++++++)ACKChannel1BitPerSlotDataChannelPhysicalLayerPacketsDRCSymbolsOne4-BitSymbolPerActiveSlotDRCCoverSymbolsOne3-bitSymbolPerActiveSlotRRISymbolsOne3-BitSymbolPer16–SlotPhysicalLayerPacketW816=(++++++++--------)W48=(++++----)128BinarySymbolsperSlot(Transmittedin?Slot)8BinarySymbolsperActiveSlot16BinarySymbolsperActiveSlot7BinarySymbolsperPhysicalLayerPacket259BinarySymbolsperPhysicalLayerPacket256BinarySymbolsperPhysicalLayerPacket128BinarySymbolsperPhysicalLayerPacket1.2288Mcps1.2288Mcps11.2288Mcps1.2288McpsW24=(++--)反向信道结构5
前向信道结构CDTDMCDSequenceRepetition/SymbolPuncturingISymbolDEMUX1to1616-aryWalshCoversWalshChannelGain=1/4WalshChipLevelSummer16ChannelsEncoderR=1/3Or1/5ForwardTrafficChannelforControlChannelPhysicalLayerPackets?ScramblerChannelInterleaverQPSK/8PSK/16QMModulatorISignalPointMapping0-?+11--?-1?WalshCov