基站测试规范要求及测试原理概览C2KEVDO.ppt

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1、1 of 49 MT8820A-E-H-1-(2.00)CDMA基站测试基站测试 21 CDMA物理层介绍物理层介绍2 CDMA基站测试项目基站测试项目3 1xEVDO介绍介绍4 EVDO基站测试项目基站测试项目 3cdma2000 Evolution IS-95 IS-95-ATIA/EIA-95-B J-STD-008TSB-74cdma20001xRelease 0cdma20001xRelease Acdma20001xRelease Bcdma20001xRelease Ccdma20001xRelease Dcdma2000 3xcdma2000 1xEV DO(Rev 0)cdm

2、a2000 1xEV DO(Rev A)cdma2000 1xEV DO(Rev B)41 CDMA物理层物理层CDMA(Code Division Multiple Access)标准：IS-95A IS-95A/B：2G移动通信标准也称为 cdmaOne.IS-2000 IMT-2000的一种3G通信标准 也被称为cdma20001xEV-DO Release 0 1xEV-DO 被规划用于优化数据传输，最高可支持2.4Mbps 的传输速率，支持多媒体业务如MP3，video等传输1xEV-DO Release A 1xEV-DO Release 0的升级,CDMA2000 1xEV-DO

3、 Rev A 可提供更高数率的上下行连接，前向最高可达到 3.1 Mbps,反向最高 1.8 Mbps.Rev A 在载波带宽不变的情况下（1.25 MHz）也提供了更高的小区容量。5多种RF信道带宽快速前向链路功率控制前向链路发送分集Turbo码技术反向链路相干解调灵活的帧长cdma系统时间多选择的长交织器1 CDMA物理层物理层关键技术 6扩频速率(Spreading Rate,SR)SR1:前向和反向cdma信道在单载波上都是采用码片速率为1.2288Mcps 的直接序列扩谱 SR3:前向信道有3个载波，每个载波的码片速率为1.2288Mcps，反向信 道在单载波上采用码片速率为3.68

4、64Mcps的直接序列扩频无线配置(Radio Configuration,RC)RC是指一系列前向或反向业务信道的工作模式，每种RC支持一套数据 速率，其差别在于物理信道的各种参数，包括各种调制特性和扩频速率等无线传输技术(Radio TransmissionTechnology,RTT)1 CDMA物理层物理层 7Spreading Rate 1 and Spreading Rate 31 CDMA物理层物理层 8CDMA Channel Generation1 CDMA物理层物理层 9CDMA Carrier(Cellular Band)1.251.25MHzMHz1.251.25MHz

5、MHzMobile StationMobile StationBase StationBase Station45 45 MHzMHzFrequencyFrequencyCDMACDMAChannelChannelFrequencyFrequency283283833.49 833.49 MHzMHz283283878.49 878.49 MHzMHz1 CDMA物理层物理层 10CDMA Carrier(Cellular Band)CDMA CarrierCDMA Carrier3030KHzKHz28328342 42 ChannelsChannels3043042612611 CDMA物

6、理层物理层 11CDMA Carrier(PCS Band)1.251.25MHzMHz1.251.25MHzMHzReverseReverseCDMA ChannelCDMA ChannelForwardForwardCDMA ChannelCDMA Channel80 80 MHzMHzFrequencyFrequencyChannelChannelFrequencyFrequency25251851.25 1851.25 MHzMHz25251931.25 1931.25 MHzMHz1 CDMA物理层物理层 12CDMA Carrier(PCS Band)CDMA CarrierCDM

7、A Carrier5050KHzKHz2525 25 25 ChannelsChannels1 CDMA物理层物理层 14Forward Link Radio Configurations1 CDMA物理层物理层 15Reverse Link Radio Configurations1 CDMA物理层物理层 16快速前向链路功率控制移动台在检测了前向链路的Eb/N0后送出功率控制比特功率控制比特与反向导频信道复用功率控制比特不进行编码，避免编码，成帧和解码等造成的时延功率控制速率是固定的800次/秒1 CDMA物理层物理层 17前向链路的发送分集多载波发送分集(MCTD)对于MC方式，不同的天

8、线采用不同的载波正交发送分集(OTD)对于DS方式，可以通过分离数据流，采用正交序列扩展两个数据流来完成1 CDMA物理层物理层 18Forward Link Channel Function Pilot ChannelThe most strongest and most obvious signal,about 15%of total power;Provides a phase reference for coherent demodulation;Provides multipath detection for Rake receiver;Provide a means for sig

9、nal strength comparisons between base stations for determining when to handoff.Diversity Pilot ChannelThe pilot channel and the发射分集导频信道（transmit diversity pilot channel）provide phasereferences for coherent demodulation of forward link CDMA channels which employ transmit diversity.Auxiliary Pilot Cha

10、nnelAn auxiliary pilot channel is required for forward link spot beam and antenna beam forming applications,and provides a phase reference for coherent demodulation of those forward link CDMA channels associated with the auxiliary pilot.Transmit Diversity Pilot ChannelA transmit diversity pilot chan

11、nel associated with an auxiliary pilot channel.1 CDMA物理层物理层 19Forward Link Channel FunctionDedicated Control ChannelCo-exist with other traffic channels Transmit Upper Layer Signaling,MAC messages,and RLP framesProvides Conduit for messaging instead of Fundamental Channel dim/blank and burstBroadcas

12、t Control Channel Broadcast only overhead messages and SMS messages.removes the overhead messages from paging channel to a separate channelQuick Paging ChannelSignal sent by a base station to inform mobile stations operating in the slotted mode during the idle state whether to receive the Paging Cha

13、nnel starting in the next Forward Paging Channel frame.1 CDMA物理层物理层 20Forward Link Channel FunctionSync Channel Transports the synchronization message to the mobile station.Paging ChannelTransmission of control information and pages from a base station to mobile stations.Broadcast system messages,ch

14、annel,and neighbor pilots information to MS 9600 or 4800 bps,20ms frame durationForward Common Control Channel and Broadcast Control Channel Transmission of digital control information from a base station to one or more mobile stations.Common Assignment ChannelUsed by the base station to acknowledge

15、 a mobile station accessing the Enhanced Access Channel or Reservation Access Mode.Common Power Control ChannelThe Common Power Control Channel is used by mobile stations operating in the Power Controlled Access Mode or Reservation Access Mode.1 CDMA物理层物理层 21Reverse Link Channel FunctionAccess Chann

16、el Common channels used for communication of layer 3 and MAC messages from mobile to base station.The Access Channel is used for short signaling message exchanges,such as call originations,responses to pages,and registrations.Reverse Pilot Channel Assists the BS to detect a MS transmission Provides

17、continuous channel estimation and reverse link power control for forward link(RC3 to RC6)Preamble of R-EACH,R-CCCH,and R-TCH Reverse Dedicated Channel Co-exist with other traffic channels Transmit Upper Layer Signaling,MAC messages,and RLP frames1 CDMA物理层物理层 22Reverse Link Channel FunctionReverse En

18、hanced Access Channel Working in modes.Basic Access Mode,mode,and Reservation Mode,closed loop power control Frame duration shall be 20,10,or 5 ms in duration Used jointly with R-CCCH when works in Reservation ModeReverse Common Control ChannelReverse Common Control Channel Used for the transmission

19、 of user and signaling information to BS when Reverse Traffic Channels are not in use.Two modes,Reservation mode and Designated mode Variable data rates of 9.6,19.2,and 384.Kbps 20,10,or 5 ms in frame duration Each R-CCCH is associated with a single F-CCCH1 CDMA物理层物理层 232 Cdma基站测量标准：C.S0010-C 24Cdma

20、基站测试项目频率覆盖频率稳定度相位精度波形质量子信道前向功率控制平均功率测量导频功率测量码域功率测量带外杂散发射互调占用带宽 25Cdma测试注意事项确保输入正确的频点，Input=RF，注意仪表的最大输入电平，安全操作Forward(RC1-2)：IS95基站；基站；Forward(RC3-5)：2000基站基站确保输入正确的频点 262 Cdma基站测量Frequency ToleranceDefinition Frequency tolerance is defined as the maximum allowed difference between the actual CDMA t

21、ransmit carrier frequency and the specified CDMA transmit frequency assignment.This test shall apply to every band class that the base station supports.Minimum Standard For all operating temperatures specified by the manufacturer,the average frequency difference between the actual CDMA transmit carr

22、ier frequency and specified CDMA transmit frequency assignment shall be less than 5 10-8 of the frequency assignment(0.05 ppm).272 Cdma基站测量Phase Tolerance Definition Pilot Channel to code channel phase tolerance is the permissible error in RF phase between the radiated Pilot Channel and the other ch

23、annels within one Forward CDMA Channel.Minimum Standard The phase differences between the Pilot Channel and all other code channels sharing the same Forward CDMA Channel should not exceed 0.05 radians and shall not exceed 0.15 radians.282 Cdma基站测量Waveform quality Definition Waveform quality is measu

24、red by determining the normalized correlated power between the actual waveform and the ideal waveform.Minimum StandardFor all base stations,the normalized cross correlation coefficient,shall be greater than 0.912(excess power 0.97 292 Cdma基站测量Total PowerDefinition Base station total power is the mea

25、n power delivered to a load with resistance equal to the nominal load impedance of the transmitter.Minimum Standard The total power shall remain within+2 dB and-4 dB of the manufacturers rated power 302 Cdma基站测量Pilot Power Definition The Pilot Channel power to total power ratio is the power attribut

26、ed to the Pilot Channel divided by the total power,and is expressed in dB.Minimum Standard The Pilot Channel power to total power ratio shall be within 0.5 dB of the configured value.312 Cdma基站测量Code Domain Power Definition Code domain power is the power in each code channel of a CDMA Channel.Minimu

27、m Standard If the base station supports RC10,the mean code domain power shall be 31.5 dB or more below the total mean output power 322 Cdma基站测量Spurious Emissions Definition Conducted spurious emissions are emissions at frequencies that are outside the assigned CDMA Channel,measured at the base stati

28、on RF output port.Minimum Standard Refer to Spec 332 Cdma基站测量Inter-Base Station Transmitter IntermodulationDefinition Inter-base station transmitter intermodulation occurs when an external signal source is introduced to the antenna connector of the base station.This test verifies that base station c

29、onducted spurious emissions are still met with the presence of the interfering source.Minimum Standard The base station shall meet the conducted spurious emission requirements 342 Cdma基站测量Occupied BandwidthDefinition The occupied bandwidth is defined as the frequency range,whereby the power of emiss

30、ions averaged over the frequency above and under the edge frequency are 0.5%each of the total radiation power of a modulated carrier.Minimum Standard The occupied bandwidth shall not exceed 1.48MHz for Spreading Rate 1 and 4.6MHz for Spreading Rate 3 353 EVDO介绍 36EVDO介绍1xEV-DO 主要优化了数据传输,其峰值速率 2.4 Mb

31、ps并支持多媒体如MP3，video conferencing的传输.1xEV-DO introduces some terminology that differs from cdma2000.Access Terminal(AT)-A mobile device equipped with a radio modem and a data interface,allowing the user to access a packet data network through the 1xEV-DO access network.Access Network(AN)-This network

32、equipment performs the same role as a base station,providing data connectivity between a packet-switched data network such as the internet and the ATs.37Forward Link Physical Channel1X EV-DOForwardChannelsPilotMediumAccessControlTrafficControlReversePower Control(RPC)ReverseActivity Bit(RAB)DRCLock

33、Bit ARQ 38TDM of Forward Link ChannelData400 chipsRPC/RAB/DRC LockRPC/RAB/DRC LockActive Slot64RPC/RAB/DRC LockPilot9664RPC/RAB/DRC LockData400 chipsData400 chips64Pilot96chips64Data400 chipschips1024 chips=half slot1024 chips=half slotSystem time1 Slot 8 Slots 1 slot=1.667 ms1/2 frame=13.33 msFrame

34、=26.67 ms 16 Slots 50231546755121415135810119 4 Slots 2 Slots 4 slot=6.66 ms2 slot=3.33 msIdle Slot64RPC/RAB/DRC LockPilot9664RPC/RAB/DRC Lockchips64RPC/RAB/DRC LockPilot9664RPC/RAB/DRC Lockchips 39Reverse Link Physical ChannelReverseChannelsPilotMediumAccessControlDataReverse RateIndicator(RRI)Data

35、 RateControl(DRC)PilotDataTrafficAccessAckAuxiliary PilotData SourceControl(DSC)40Reverse Link Frame Structure Reverse Link Frame Structure 41cdma20001x EV DO Rev 0Optimized support for downlink intensive(asymmetric),delay-tolerant applicationsWeb browsing,File Transfer,WAP etcGoalsCapacity and Cove

36、rage EnhancementSupport for QoSCapacity EnhancementForward Link 2.4Mbps peak data ratePhysical Layer H-ARQ Multi-user diversity schedulerDiversity reception Reverse Link153.6Kbps peak data rateReverse rate is controlled by several factors 42cdma20001x EV DO Rev APhysical LayerImproved support for Qo

37、S-sensitive servicesRapid connection setup with improved terminal battery lifeHigher rate access channel(up to 38.4kbps)with shorter preamble(4-slots)Short inter-transmit interval on control channel Short packet control channel(4-slots)in Idle state Efficient resource allocation for both low latency

38、 and delay tolerant data sourcesAN controlled tradeoff(per flow)between capacity and latencyFiner rate quantizationAdditional data rates on Forward Link and Reverse LinkLatency target determines effective data rateImproved packing efficiencyMulti-user packets on Forward Link-A single physical layer

39、packet can carry data for multiple ATsHigher peak data rates3.1Mbps on Forward Link(2.45 Mbps in 1x EV DO Rev 0)1.8Mbps on Reverse Link(153.6 Kbps in 1x EV DO Rev 0)434EVDO基站测试5标准：C.S0032-A 441.EVDO基站测试测试项目Frequency CoverageFrequency TolerancePilot Channel Time ToleranceWaveform QualityRPC Channel t

40、ime ResposeForward Traffic Channel Response to ACK ChannelTotal Output PowerPilot/MAC Channel PowerCode Domain Power Conducted Spurious EmissionsInter-Sector Transmitter IntermodulationOccupied Bandwidth 451.EVDO基站测试Frequency Coverage Frequency Tolerance Definition The frequency tolerance is defined

41、 as the maximum allowed difference between the actual CDMA transmit carrier frequency and the specified CDMA transmit frequency assignment.This test shall apply to every band class that the sector supports.Minimum Standard For all operating temperatures specified by the manufacturer,the average freq

42、uency difference between the actual CDMA transmit carrier frequency and specified CDMA transmit frequency assignment shall be less than 5 10-8 of the frequency assignment(0.05 ppm).461.EVDO基站测试Waveform QualityDefinition The waveform quality is measured by determining the normalized correlated power

43、between the actual waveform and the ideal waveform.This test is performed with a single carrier and single sector only.Minimum Standard The normalized cross correlation coefficient pilot shall be greater than 0.97(excess power 13 0.13 dB).The normalized cross correlation coefficient MAC shall be gre

44、ater than 0.912(excess power 0.4 dB).The normalized cross correlation coefficient data shall be greater than 0.97(excess power 0.13 dB)for all data rates.471.EVDO基站测试Total PowerDefinition Within each slot,the Pilot,MAC,and Traffic or Control Channels shall be time-division multiplexed.All time-divis

45、ion multiplexed channels shall be transmitted at equal power.This test measures the time response of the mean output power for non-idle slots and the mean power at the RF output port.Minimum Standard 481.EVDO基站测试Pilot/MAC Channel PowerDefinition The Pilot/MAC Channels are transmitted in bursts of 22

46、4 chips every half slot.In idle slots(when there is no data to transmit on the Control or Forward Traffic Channels)these bursts are gated in time.This test measures the time response of the mean output power for idle slots(Pilot/MAC bursts).Minimum Standard 491.EVDO基站测试Conducted Spurious EmissionsDe

47、finition The conducted spurious emissions are emissions at frequencies that are outside the assigned CDMA Channel,measured at the sector RF output port.Conducted spurious emissions are measured for two test conditions:Case 1:Continuous Data Mode(no idle slots)Case 2:Idle Mode(all idle slots,except t

48、he Control Channel).Note:Inhibiting Control Channel transmissions is optional for Case 2.Minimum Standard Refer to standard.501.EVDO基站测试Inter-Sector Transmitter IntermodulationDefinition The inter-sector transmitter intermodulation occurs when an external signal source is introduced to the antenna c

49、onnector of the sector.This test verifies that conducted spurious emissions are still met with the presence of the interfering source.Minimum Standard Refer to standard.511.EVDO基站测试Occupied BandwidthDefinition The occupied bandwidth is defined as the frequency range,whereby the power of emissions averaged over the frequency above and under the edge frequency are 0.5%each of the total radiation power of a modulated carrier.Minimum Standard The occupied bandwidth shall not exceed 1.48MHz.