您好,欢迎访问三七文档
当前位置:首页 > 商业/管理/HR > 信息化管理 > CTIA_testplanformobilestationOTArevision
CTIA_testplanformobilestationOTArevisionSection1Instruction1、CTIACellulartelecommunicationsindustryassociation蜂窝电信工业协会2、Purpose目的CTIAdefineOnradiatedRFpowerrequirementsmobilestationreceiverperformancemeasurements3、Scope范围Meetequipmentconfigurationsaccurate精确CTIAlaboratorytechniquesrepeatablestandardstestmethodologiesuniform统一evaluationcriteria评估标准4、Testoverview1)Typeoftransmittertechnology:CDMA,GSM,etc.testreceiver2)Testingrequirementsfallinto3categories1、measuringthebaseperformanceofthetestchamber2、measuringthepathlossofthetestsystem3、measuringtheperformanceofthemobilestation3)substitutionmethod替代法先测一个已知性能的机台golden,再测待测机台,用待测机台的数据(性能)与golden的对比,得到待测机台的性能分析。之所以这么做,是因为无法完全正确的确认pathloss,后面会提到Section2scopeofmeasurements1)Goodradiatedperformanceiscritical(鉴定)totheeffectiveoperationofamobiledeviceintoday’snetwork.Devicebecomesmaller,radiatedperformancebecomecompromised.(Achievinganeffectiveantennainasmallsizeandovermultiplefrequencybandsisadifficulttask.)PkEIRPeffectiveisotropicradiatedpower峰值全向有效辐射功率不能高效率完成信号传送,需要特定的方向,其他方向信号较差,故而引进如下(下页):Further,thehumanheadand/orhandcanaltertheshapeandpeakvalueoftheEUTradiationpattern.Lossesduetotheheadand/orhandcanvarysignificantlywithfrequency,devicesize,andtheantennadesignimplemented.峰值=peakvalueTestTRP针对辐射性能MethodTIS针对接收性能Afrequentcauseofpoorsensitivityonasinglechannel,orasmallnumberofchannels,isduetoreceiverin-bandnoise,orspurioussignalsfromthetransmitteritselfbeingradiatedbackintothereceiver.ThereceiversensitivitywillbemeasuredwiththetransmittersettothemaximumpoweroutputallowedbytheparticularEUTandtechnologycombination.接收机的带内噪声或发射机的杂散信号干扰接收机是导致移动台在单个信道或少数几个信号上灵敏度较低的主要原因。EUT的接收机灵敏度在它的发射机允许的最大发射机功率条件下进行测试。Theproceduresdefinedhereinwill:本标准包括3个内容a)evaluatetheinherentperformanceofthetestchamberusedforthemeasurements;评估测量暗室的固有性能b)detailthemeasurementsofthetransmitterperformance(asTRP)andreceiverperformance(asTIS)forthemobiledevice(measuringmobileperformanceinfree-spaceand/orwithphantomswhereappropriate);详细叙述移动台终端的EIRP(TRP测试)和接收机性能(TIS测试)的测试步骤(包括自由空间或带有人头模型情形)c)detailthemethodforcalculationoftheassociatedmeasurementuncertainty.TRP和TIS测量不确定度的详细计算方法2)Transmitterperformance通过在移动台球形周围不同位置测量移动台辐射功率来衡量EUT的辐射射频性能Forperformance:MeasurementoftheaverageEIRPonaheadand/orhandmodelismoremeaningfulthanmeasurementofpeakEIRPinfree-spaceconditions.264=(360/15)*(180/15+1-2)这是3维计算测试点数180/15+1表示180上有13个点(TRP)3)Receiverperformance通过测量EUT的误码率(BER)或误帧率(FER)来衡量EUT的接收机性能EISEffectiveIsotropicSensitivity全方向灵敏度(反:EIRP)Thedownlinkreceivepathisintegraltothequalityofthedevice'soperation.60=(360/30)*(180/30+1-2)理解同上(TIS)1、EUTMeasurements—TransmitterTheradiatedRFperformanceoftheEquipmentUnderTest(EUT)ismeasuredbysampling(抽样的)theradiatedtransmitpowerofthemobileatvariouslocationssurrounding(周围的)thedevice.2、EUTMeasurements—ReceiverThereceiverperformanceofEUTismeasuredutilizing:BitErrorRate(BER)FrameErrorRate(FER)误帧率orothererrorcriteria(etc.)3、EUTMeasurements—General圆锥切法。EUT沿着它的长轴旋转,在每个旋转位置,测量天线在EUT上方和下方多个位置测量(对于单测量天线的系统可能需要手动调节测量天线,而对于多测量天线系统则是电动)。大圆切法。测量天线固定不动,EUT在两个正交轴上按照一定顺序旋转。在圆锥切法和大圆切法中,EUT长轴上的仰角为θ角,EUT方位角为Φ角。大圆切法时的转台旋转轴为θ轴,圆锥切法时的转台旋转轴为Φ轴,两种测试方法的数据是相同的,因为他们的采样点是相同的,而且采样方法一致。测量天线应该能在两种极化(两正交线性极化)下测量Eθ和EΦ,Eθ和EΦ可以在EUT旋转的时候同时进行测量也可以按顺序测量。自注解:沿着天线方向的是Φ角,属于自传;沿着支架旋转的是θ角,属于公转。利用第4节(见9页)的测量数据,可以归一化EUT在以EUT天线为中心的球面上的性能。基站模拟器用于与EUT建立呼叫,要求EUT报告在它的通话接收频率下测量到的信号强度,这两种测试可以分开独立测试,也可以同时测量Dependingonthetypeofdevicebeingtested,measurementswillbemadeinthefollowingconfigurations:根据EUT类型,分别在以下两种情况下进行测试1)A“free-space”configuration,wherebytheEUTwillbeplaceddirectlyonasupportmadeoflowdielectricmaterial2)A“headphantomonly”configuration,wherebytheEUTwillbeplacedagainstaheadphantom,3)A“headandhandphantom”configuration,wherebytheEUTwillbeplacedinahandphantom,againstaheadphantom,4)A“handphantomonly”configuration,wherebytheEUTwillbeplacedinahandphantom.TestMethod1)ConicalCutTestMethod圆锥切法人头模型树立放置,在水平面旋转。2)GreatCircleTestMethod大圆切法Section3TestSiteCharacteristicsandQuietZoneAccuracy测试场地特性和静区精度远场测试需要的最小测量距离R的要求1、MinimumMeasurementDistanceλ为测试频段的自由空间波长D简化为EUT最大尺寸(有人头模型,则包括其中,大约300MML\U表示下行\上行波λisthefree-spacewavelengthatthefrequencybandofinterest.DwouldsimplybethelargestdimensionoftheEUT,butsomeportionofthehead/handphantommustbeincludedinDforhead/handphantomtests.以上距离是本标准要求的远场测量条件下的便于测量的最小测试距离。从每个频段的三种传统远场条件选择最严酷的值作为本标准的最小测量距离。三种传统远场条件分别是相位不确定度限值2D(2平方)/λ,幅度不确定度限值3D,reactiveNear-Fieldlimit(活性近场限制)反应近场限值3λ,其中,D为辐射体尺寸,λ为测试频段的自由空间波长。对于自由空间测试,D简化为EUT最大尺寸,有人头模型时,部分人头模型尺寸计入D。本标准中,D包括部分人头模型尺寸,定义300毫米。FirstR:thephaseuncertaintylimit相位不确定限制SecondR:theamplitudeuncertaintylimit幅度不确定限制ThirdR:thereactiveNear-Fieldlimit反应近场限制2)EquipmentRequired1.暗室和球形定位系统特性。暗室必须满足EUT和测量天线之间的最小测量距离R要求,无电磁干扰。用于衡量天线模式测量中不同定位系统对结果的影响。注意:在设计中需要防止向测试区域反射过多的辐射能量或者吸收过多的辐射能量,会产生错误的测量结果。尽量降低静区中的反射电平,过高的反射电平将导致错误的测量结果。2.Cellular-band同轴偶极子探测天线/Cellular-band参考环探测天线/PCS-band同轴偶极子探测天线/PCS-band参考环探测天线,在方位角平面模式的对称性应小于±0.1dB。注释:以上天线均需按照3.3节进行相应频率的优化1.用于探测天线定位的低电介质常数支撑材料,如聚苯乙烯泡沫塑料。2.测量天线,如喇叭或偶极子。3.网络分析仪或信号源/测量接收机。Frequenciestobeusedtotestforquietzoneaccuracy静区精度测试的频率为:MediaFLOband:722MHz±
本文标题:CTIA_testplanformobilestationOTArevision
链接地址:https://www.777doc.com/doc-206 .html