基站测试规范要求及测试原理概览课件.ppt

1、1 of 49 MT8820A-E-H-1-(2.00)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)cdma2000 1xEV DO

2、(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cdma2000 1xEV-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 Rev A 可提供更

3、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3.6864Mcps的直接序列

4、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 301MH z2 MH z3 MH z4 MH z5 MH z01MH z2 MH z3 MH z4 MH z5 MH z1.25 MH zForwardLinkReverseLink01MH z2 MH z01MH z2 MH

5、z1.25 MH zForwardLinkReverseLink1 CDMA物理层物理层 8CDMA Channel Generation1 CDMA物理层物理层 9CDMA Carrier(Cellular Band)1 CDMA物理层物理层 10CDMA Carrier(Cellular Band)1 CDMA物理层物理层 11CDMA Carrier(PCS Band)1 CDMA物理层物理层 12CDMA Carrier(PCS Band)1 CDMA物理层物理层 13Radio ConfigurationsRadio Configuration:A set of Forward Tr

6、affic Channel and Reverse Traffic Channel transmission formats that are characterized by Physical Layer parameters such as transmission rates,modulation characteristics,and spreading ratecdma2000 Radio Configurations:RC1 through RC9 on the Forward link RC1 through RC6 on the Reverse link1 CDMA物理层物理层

7、 14Forward Link Radio ConfigurationsRadi oRadi o Confi gurati onConfi gurati on Spreadi ng Spreadi ng RateRate Data Rates,Forward Error Correcti on and Other Characteri sti csData Rates,Forward Error Correcti on and Other Characteri sti cs 1 1 1200,2400,4800 and 9600 bps data rates wi th FEC code ra

8、te=,BPSK m odul ati on 2 1 1800,3600,7200 and 14400 bps data rates wi th FEC code rate=,BPSK m odul ati on 3 1 1500,2700,4800,9600,19200,38400,76800 and 153600 bps data rates wi th FEC code rate=1/4,QPSK m odul ati on 4 1 1500,2700,4800,9600,19200,38400,76800,153600 and 307200 bps data rates wi th F

9、EC code rate=1/2,QPSK m odul ati on 5 1 1800,3600,7200,14400,28800,57600,115200 and 230400 bps data rates wi th FEC code rate=1/4,QPSK m odul ati on 6 3 1500,2700,4800,9600,19200,38400,76800,153600 and 307200 bps data rates wi th FEC code rate=1/6,QPSK m odul ati on 7 3 1500,2700,4800,9600,19200,384

10、00,76800,153600,307200 and 614400 bps data rates wi th FEC code rate=1/3,QPSK m odul ati on 8 3 1800,3600,7200,14400,28800,57600,115200,230400 and 460800 bps data rates wi th FEC code rate=or 1/3,QPSK m odul ati on 9 3 1800,3600,7200,14400,28800,57600,115200,230400,460800 and 1036800 bps data rates

11、wi th FEC code rate=or 1/3,QPSK m odul ati on 1 CDMA物理层物理层 15Reverse Link Radio ConfigurationsR Ra ad di i o o C Co on nf fi i g gu ur r a at ti i o on n S Sp pr r e ea ad di i n ng g R Ra at te e D Da at ta a R Ra at te es s,F Fo or r w wa ar r d d E Er r r r o or r C Co or r r r e ec ct ti i o on

12、n a an nd d O Ot th he er r C Ch ha ar r a ac ct te er r i i s st ti i c cs s 1 1 1200,2400,4800 and 9600 bps dat a r at es wi t h FEC code r at e=1/3,64-ar y or t hogonal modul at i on 2 1 1800,3600,7200 and 14400 bps dat a r at es wi t h FEC code r at e=,64-ar y or t hogonal modul at i on 3 1 1200

13、,1350,1500,2400,2700,4800,9600,19200,38400,76800 and 153600 bps dat a r at es wi t h FEC code r at e=1/4,307200 bps dat a r at e wi t h FEC code r at e=,QPSK modul at i on wi t h a pi l ot 4 1 1800,3600,7200,14400,28800,57600,115200,and 230400 bps dat a r at es wi t h FEC code r at e=1/4,QPSK modul

14、at i on wi t h a pi l ot 5 3 1200,1350,1500,2400,2700,4800,9600,19200,38400,76800 and 153600 bps dat a r at es wi t h FEC code r at e=1/4,307200 and 614400 bps dat a r at e wi t h FEC code r at e=1/3,QPSK modul at i on wi t h a pi l ot 6 3 1800,3600,7200,14400,28800,57600,115200,230400 and 460800 bp

15、s dat a r at es wi t h FEC code r at e=1/4,1036800 bps dat a r at e wi t h FEC code r at e=,QPSK modul at i on wi t h a pi l ot 1 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，不同的天线采用不同的载波正交发送分集

16、(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 signal strength c

17、omparisons 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 ChannelAn auxilia

18、ry 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 channel associated

19、 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 burstBroadcast Control Chan

20、nel 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 Channel starting

21、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,channel,and neig

22、hbor 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 a mobile stat

23、ion 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 Channel Common chan

24、nels 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 continuous cha

25、nnel 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 Enhanced Access

26、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 of user and s

27、ignaling 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基站测试项目频率覆盖频率稳定

28、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 transmit carrie

29、r 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 carrier frequency

30、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 channels within

31、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 measured by determi

32、ning 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 mean power delive

33、red 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 d B o f t h e manufacturers rated power 302 Cdma基站测量Pilot Power Definition The Pilot Channel power to total power ratio is the power attributed to the

34、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 p o w e r i n e a c h c o d e c h a n n e l o f a C D M A Cha

35、nnel.Minimum Standard I f t h e b a s e s t a t i o n 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,mea

36、sured at the base station 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 verif

37、ies that base station conducted 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,whe

38、reby 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 for Spreading Rate 1 and 4.6MHz for Spreading Rate 3 353 EVDO介绍 36EVDO介绍1xEV-DO

39、 主要优化了数据传输,其峰值速率 2.4 Mbps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 Ne

40、twork(AN)-This network 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)ReverseAc

41、tivity Bit(RAB)DRCLock 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 ms

42、1/2 frame=13.33 msFrame=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

43、 RateIndicator(RRI)Data 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 applications Web browsing,File Transfer,WAP e

44、tcGoals Capacity and Coverage Enhancement Support for QoSCapacity Enhancement Forward Link 2.4Mbps peak data rate Physical Layer H-ARQ Multi-user diversity scheduler Diversity reception Reverse Link 153.6Kbps peak data rate Reverse rate is controlled by several factors 42cdma20001x EV DO Rev APhysic

45、al Layer Improved support for QoS-sensitive services Rapid connection setup with improved terminal battery life Higher 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 resour

46、ce allocation for both low latency and delay tolerant data sources AN controlled tradeoff(per flow)between capacity and latency Finer rate quantization Additional data rates on Forward Link and Reverse Link Latency target determines effective data rate Improved packing efficiency Multi-user packets

47、on Forward Link-A single physical layer packet can carry data for multiple ATs Higher peak data rates 3.1Mbps 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)43EVDO基站测试标准：C.S0032-A 44EVDO基站测试测试项目Frequency CoverageFrequency TolerancePilot Channel Time

48、ToleranceWaveform QualityRPC Channel time ResposeForward Traffic Channel Response to ACK ChannelTotal Output PowerPilot/MAC Channel PowerCode Domain Power Conducted Spurious EmissionsInter-Sector Transmitter IntermodulationOccupied Bandwidth 45EVDO基站测试Frequency Coverage Frequency Tolerance Definitio

49、n The frequency tolerance is defined 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

50、by the manufacturer,the average frequency 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).46EVDO基站测试Waveform QualityDefinition The waveform quality is measured by determinin