CMW500 LTE射频测试简介.pdf

CMW500 LTE射频测试简介罗德与施瓦茨产品支持部III Year s ofII n Dr iving mihil Innovat ion含HDE&SCHWARZ学习内容通过本次学习，我们将了解到:*LTE物理层的结构是怎样的:人正功率分布有什么特点 TS 36.521定义了哪一些测试f|卅|川 Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 2LTE物理层物理层资源示意图One downlink slot（收SJU-Epoqnse.N X 晅S J U-EPJqnss.NN募 OFDM symbolsoTPiir/F Ml l iniYear s o fl|：Dr iving nl r Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 3LTE物理层LTE时频资源：RE(Reo sur c e El ement),LTE最小的资源REG(RE Gr o up),将4个RE组合在一起，作为更大的粒度RB(Reso ur c e Bl o c k),12subc ar r ier*1sl o t,是LTE基本调度单元RB Pair,在一个TTI中两个时间上连续的，频率相同的RBf|卅|川 Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ4LTE物理层LTE物理层帧结构(FDD)1 Tjymbol-15kHz7CPMOL x 66.7psTc p x 5.1/4.7 us34CPCPNo r mal CPExt ended CP1 subfr ame=2 sl ot,1sl ot=0.5mssubfr ame=1ms(=min TTI)OFDM Symbo l1 r adio f r ame=10 subf r ames=10 TTIs=10 ms#0#1#2#3#4#5#6#7#8#9#10#11#12#13#14A#15#16#17#181_#19Dr iving Inno vat io nmil l UM Year s o f#：|l 吧2ROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 5LTE物理层物理层帧结构Type 1(FDD)1 f r ame=10 ms 1 f r ame=10 subf r ame 1 subf r ame=2 sl o t(0.5ms)Maximum FFT size(20 MHz Bandwidt h)=2048(110 x12=1320 subc ar r ier used)Subc ar r ier spac ing=15 kHzSubc ar r ier Bandwidt h 2048x15kHz=30.72 MHzOne r adio f r ame.7f=3072007i=10 ms!-One sl o t.n153607i=0.5 ms版#1#2#3#18#19One subframeROHDE&SCHWARZ Jun2011 I LTETest l 马志聪，RS_SZ 6 W Ihiil l Inno vat io nLTE物理层物理层帧结构Type 2(TDD)。One r adio fr ame=10 ms=2 hal f-fr ames。Subf r ames 0 and 5 al ways f o r DL Special subfr ame with var ious par titioning of the fol l owing 3 fiel ds DwPTS DL GP Guar d per io d UpPTS UL,al ways f o l l o wed by an UL subf r ame。Diagr am il l ustr ates 5 ms DL to UL switching point per iodicity。One spec ial subf r ame per hal f-f r ame 10 ms switching point per iodicity al so suppor ted。One spec ial subf r ame per r adio f r ameSuppor ts 7 differ ent UL/DL configur ations。Dif f er ent number s o f UL/DL subf r ames par t it io ningf W Year s o fWil Dr ivingJr Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 7LTE物理层TYPE2 UL/DL 配置Upl ink-downl ink configur ationDownl ink-to-Upl inkSwitch-point per iodicitynumber012345678905 msDSuuUDSUUU15 msDSuuDDSUUD25 msDsuDDDsUDD310 msDsuUUDDDDD410 msDsuUDDDDDD510 msDsuDDDDDDD65 msDsuUUDSUUD这个时间间隔表示两个相邻特殊子帧的时间间隔TFIK Year sof,Ml l l nlDr iving Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 8LTE中的DFTS9FDM技术DFTS-OFDMB-t to Cons 一 e=a=*.on Mapping根据PDCCH的指示映射 到相应的频带，其余位置 补零三一三|7,三三 o o o o o o-s o o oHDE&SCHWARZJun 2011 I LTE Test ised subc ar r ier sReminder:Fo r FFT,M must be mul t ipl e o f 2X|I Ml I VIIWl hii Inno vat io nLTE上行信道映射(FDD)Unsc hedul ed Reso ur c e Bl o c ks 匚 Sc hedul ed PUCCH Sc hedul ed Reso ur c e Bl o c ks Demo dul at io n Ref er enc e Signal PUCCH Demo dul at io n Ref er enc e Signal PUSCHSo unding Ref er enc e SignalTo t al avail abl e bandwidt hAiio c aiea o anawiainYear s o f Dr ivingROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 12,Ihnl l Inno vat io nLTE uplinkSC-FDMA time-frequency multiplexing1 r eso ur c e bl o c k=180 kHz=12 subc ar r ier sSubc ar r ier spac ing=15 kHz1 sl o t=0.5 ms=7 SC-FDMA symbo l s1 subf r ame=1 ms=1 TTI*TTI=t r ansmissio n t ime int er val*Fo r no r mal c yc l ic pr ef ix dur at io n/WWWt imeQPSK,16QAMf r equenc yROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 13Year s o f Dr iving7%卜上行功率控制LTE与WCDMA上行功才空对比：WCDMA上行干扰主要来自于小区内不同UE之间的干扰LTE的上行功控管理的要求与WCDMA有很大的不同，LTE小区内每个 UE分配的时频资源是不一样的，因此小区内干扰的管理不像WCDMA那 样关键WCDMA以一个sl o t(0.67ms)为环延时，LTE是以5个TTI(5ms)为环延时WCDMA是以1 db为步进，0.67ms为周期的调整，LTE可以以更大的 步进，而且是非固定周期的调整，LTE的功控频率一般不会超过几百赫 兹f|卅|川 Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 14上行功率控制功控分类开环功控闭环功控：对于LTE来说，采用的是一种基本开环工作点+动态偏移的方式f|卅|川 Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 15LTE终端的测试标准 RAN5TSTitl eCompl etion l evel at RAN#44Date for Appr ovalFunctional fr eezing date36.508Common test envir onments for UE confor mance testing90%Dec.08Sep.0936.521UE confor mance specification Radio tr ansmission and r eception(RF)80%Dec.08Sep.0936.523UE confor mance specification(Sig)70%Dec.08*Sep.09f|卅|川 Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 16LTE射频测试要求:根据TS 36.508,4.3.1节要求，默认的射频测试带宽为：最小支持 带宽，5MHz带宽，和最大支持带宽:如果UE不支持5MHz带宽，则只测最大最小带宽具体的测试项，会根据本测试项定义具体的测试配置f|卅|川 Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 17LTE信道分配Tabl e 5.4.2-1 Tr ansmissio n bandwidt h c o nf igur at io n WRB in E-UTRA c hannel bandwidt hsChannel bandwidth BWChanneI MHz1.435101520Tr ansmission bandwidth configur ation Nrb615255075100-TurHl l hiYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 18LTE信道分配Figur e 5.4.2-1 Def init io n o f Channel Bandwidt h and Tr ansmissio n Bandwidt h Co nf igur at io n f o r o ne E-UTRA c ar r ierTFIK Year sof,Ml l l nlDr iving Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 19LTE各频带支持的带宽Tabl e 5.4.2.1-1:E-UTRA c hannel bandwidt hE-UTRA band/channel bandwidthE-UTRA Band1.4 MHz3 MHz5 MHz10 MHz15 MHz20 MHz1YesYesYesYes2YesYesYesYesYesYes3YesYesYesYesYesi】Yes4YesYesYesYesYesYes5YesYesYesYes16YesYes7YesYesYesYes8YesYesYesYes19YesYesYesYesROHDE&SCHWARZ Jun2011 I LTE Test i 马志聪，RS_SZ 20ni|ii iiJl l wii 5Year s o f Dr iving Inno vat io nLTE-FDD测试频率举例Tabl e 4.3.1.1.1-1:Test f r equenc ies f o r E-UTRA c hannel bandwidt h f o r o per at ing band 1Test Fr equency IDBandwidth MHzNULFr equency of Upl ink MHzNdlFr equency of Downl ink MHzLow Range5180251922.5252112.51018050192550211515180751927.5752117.5201810019301002120Mid Range5/10/15/201830019503002140High Range5185751977.55752167.510185501975550216515185251972.55252162.5201850019705002160 sROHDE&SCHWARZ Jun2011 I LTE Test i 马志聪，RS_SZ 21,Mil l!Inno vat io nLTE-TDD测试频率举例Tabl e 4.3.1.2.1-1:Test f r equenc ies f o r E-UTRA c hannel bandwidt h f o r o per at ing band 33Test Fr equency IDBandwidth MHzEARFCNFr equency(UL and DL)MHzLo w Range5360251902.51036050190515360751907.520361001910Mid Range5/10/15/20361001910High Range5361751917.51036150191515361251912.520361001910l l l n Year s o fl|j Dr ivingil l Inno vat io nTPiirF wiiiiiROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 22UE Maximum Output Power:最大功率测试对于CLASS 3级别的UE,最大功率为23dBm 2.7dB在特殊的RB分配条件下（落在带宽上下边缘4MHz的区间），最大功率下限 可以再往下降低 1.5dB,To l er anc e=+2.7/-4.2 dBf W Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 23UE Maximum Output PowerTiirF wiiiiiYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 24UE Maximum Output Power7，:Jr 圳l iilYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 25Tx power aspectsRB po wer=Resso ur c e Bl o c k Po wer,po wer o f 1 RB TX po wer=int egr at ed po wer o f al l assigned RBs71:Jr 圳 I11IYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 26Maximum Power Reduction(MPR):缩减最大功率测试其目的是为了降低终端在高阶调制或者在分配大数目RB情况下，对放大 器的要求。如果用的是QPSK调制，分配大数目RB,MPR降低1db如果用16QAM调制，MPR降低1db如果同时使用16QAM调制和分配大数目的RB,MPR降低2dbYear s o fDr ivingInno vat io n-TurHl l hiROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 27Maximum Power Reduction(MPR)Tabl e 6.2.3.3-1:Maximum Power Reduction(MPR)for Power Cl ass 3Modul ationChannel bandwidth/Tr ansmission bandwidth configur ation RBMPR(dB)1.4 MHz3.0MHz5 MHz10 MHz15 MHz20 MHzQPSK 5 48 12 16 18 116 QAM54812 1618 5 48 12 16 1827，:Jr 圳l iilYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 28Maximum Power Reduction(MPR)TiirF wiiiiiYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 29Configured UE transmitted Output Power:也正可以由基站通过广播消息向UE发送功率配置信息，当UE收到这 个广播消息后会调整自身的上行功率，满足基站配置的要求Test set up f o r Co nf igur ed UE o ut put Po wer#RBRB Po s/St ar t RBMo dul at io np-MaxTest po int 118Lo wQPSK-10Test po int 218Lo wQPSK10Test po int 318Lo wQPSKI 5Year s o fDr ivingInno vat io n-TurHl l hiROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 30Configured UE transmitted Output PowerConfig.TiirF wiiiiiYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 31Configured UE transmitted Output PowerNo t e:In addit io n no t e 2 in Tabl e 6.2.2.3-1 shal l appl y t o t he t o l er anc es.Channel bandwidth/maximum output power1.4 MHz3.0 MHz5 MHz10 MHz15 MHz20 MHzMeasur ed UE o ut put po wer t est po int 1-10 dBm 7.7Measur ed UE o ut put po wer t est po int 210 dBm 6.7Measur ed UE o ut put po wer t est po int 315 dBm 5.7f W Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 32General ON/OFF Time Mask：开关时间模板测试时域的功率开关特性Figur e 6.3.4.1.3-1:Gener al ON/OFF time maskl l l n Year s o fl|j Dr ivingil l Inno vat io nTPiirF wiiiiiROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 33General ON/OFF Time Mask开关时间模板指标要求Channel bandwidth/minimum output power/measur ement bandwidth1.4 MHz3.0MHz5 MHz10 MHz15 MHz20 MHzTr ansmit OFF po wer-48.5 dBmTr ansmissio n OFF Measur ement bandwidt h1.08 MHz2.7 MHz4.5 MHz9.0 MHz13.5 MHz18 MHzExpec t ed Tr ansmissio n ON Measur ed po wer-14.8 7.5-10.8 7.5-8.6 7.5-5.6 7.5-3.9 7.5-2.6 7.5ROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 34,Ml l iiihYear s o f Dr iving Inno vat io nGeneral ON/OFF Time Mask7，:Jr 圳l iilYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 35PRACH Time MaskPRACH时间模板用于验证UE发送的Pr eambl e功率是否满足规范 的要求，以及其功率开关特性Figur e 6.3.4.2.1.3-1:PRACH ON/OFF time maskl l l n Year s o fl|j Dr ivingil l Inno vat io nTPiirF wiiiiiROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 36PRACH Time Mask开关时间模板测试时域的功率开关特性Tabl e 6.3.4.2.1.3-1:PRACH ON power measur ement per iodChannel bandwidth/Output Power dBm/measur ement bandwidth1.4 MHz3.0 MHz5 MHz10 MHz15 MHz20 MHzTr ansmit OFF po wer-48.5 dBmTr ansmissio n OFF Measur ement bandwidt h1.08 MHz2.7 MHz4.5 MHz9.0 MHz13.5 MHz18 MHzExpec t ed PRACH Tr ansmissio n ON Measur ed po wer-1 7.5-1 7.5-1 7.5-1 7.5-1 7.5-1 7.5Tabl e 6.3.4.2.1.5-1:PRACH time maskPRACH pr eambl e for matMeasur ement per iod(ms)00.903111.484421.803132.284440.1479 KROHDE&SCHWARZ Jun2011 I LTETest l 马志聪，RS_SZ 37,d Inno vat io nPRACH Time Mask7，:Jr 圳l iilYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 38SRS Time Mask：测量SRS参考信号的时间模板Tabl e 6.3.4.2.2.5-1:SRS time maskChannel bandwidth/Output Power dBm/measur ement bandwidth1.4 MHz3.0MHz5 MHz10 MHz15 MHz20 MHzTr ansmit OFF po wer-48.5 dBmTr ansmissio n OFF Measur ement bandwidt h1.08 MHz2.7 MHz4.5MHz9.0MHz13.5 MHz18 MHzExpec t ed SRS Tr ansmissio n ON Measur ed po wer-2.67.5-2.6 7.5-2.6 7.5-2.6 7.5-2.6 7.5-2.6 土7.5l l l n Year s o fl|j Dr ivingil l Inno vat io nTPiirF wiiiiiROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 39SRS Time Mask学CMWmini111 Year s o fDr iving Ul l ini Inno vat io iInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS SZ40SRS Time MaskTPiir;/F Ml l iniYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 41Frequency Error:频率误测测试主要关注OFDM符号的频率误差Year s o fDr ivingInno vat io nTPiir;,Ml l iniROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ42Error Vector Magnitude(EVM):*LTE对EVM的测试要求Par ameterUnitAver age EVM LevelRefer ence Signal EVM LevelQP8K o r BP8K%17.517.516QAM%12.512.5Par ameterUnitLevelUE Out put Po werdBm-40Oper at ing c o ndit io nsNo r mal c o ndit io nsf W Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ43Error Vector Magnitude(EVM):.EVM的测试的设置Test set up f o r PUSCH EVM measur ement(l o w,middl e,high r ange)#RBRB Po s/St ar t RBMo dul at i o nUE Out put Po werTest set 118Lo wQPSKPtJMAXTest set 218HighQPSKP UMAXTest set 318Lo wQPSK-36.83.2dBmTest set 418HighQPSK-36.83.2dBmTest set 518Lo w16QAMPuMAXTest set 618High16QAMPuMAXTest set 118Lo wI6QAM-36.83.2dBmTest set 818HighI6QAM-36.83.2dBmTest set 9100Lo wQPSKPuMAXTest set 10100Lo wQPSKPuMAXTest set 11100Lo wQPSK-36.83.2dBmTest set 12100Lo wQPSK-36.83.2dBmTest set 13100Lo wI6QAMP UMAXTest set 14100Lo w16QAMPuMAXTest set 15100Lo wI6QAM-36.83.2dBmTest set 16100Lo wI6QAM-36.83.2dBmROH DE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 44Year s o f Dr iving“Ul l inil Inno vat io nError Vector Magnitude(EVM)f W Year s o f Dr iving Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ45Carrier leakage:载波泄露要测的是子载波的调制符号的原点漂移情况:如果DC子载波被分配使用的话，DC o f f set还会对原点漂移带来影 响ROHDE&SCHWARZ Jun2011 I LTETest l 马志聪，RS_SZ 46 W Ihnl l Inno vat io nCarrier leakage:相对载波泄露功率（原点漂移功率）是加性正弦信号功率和调制信号 功率的比值Tabl e 6.5.2.2.3-1:Minimum r equir ement s f o r Rel at ive Car r ier Leakage Po werLOLeakagePar ameter sRel ative Limit(dBc)Out put po wer 0 dBm-25-30 dBm Out put po wer 0 dBm-20-40 dBm Out put po wer -30 dBm-10TPiirMl l inil l l n Year s o f l|j Dr iving il l Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ47Carrier leakage:载波泄露的测试的设置Test set up f o r c ar r ier l eakage measur ement#RBRB Po s/St ar t RBMo dul at i o nUE Out put Po werTest set 118Lo wQPSK3.23.2dBmTest set 218HighQPSK3.23.2dBmTest set 318Lo wQPSK-26.83.2dBmTest set 418HighQPSK-26.83.2dBmTest set 518Lo wQPSK-36.83.2dBmTest set 618HighQPSK-36.83.2dBmf W Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ48Carrier leakage7，:Jr 圳l iilYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ49In-band emissions for non allocated RB:这个测试项要测的是UE上行发射功率，除了自身分配的RB之外,对带内其他RB的影响f|卅|川 Year s o fWil Dr iving“Ul l ini Inno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 50In-band emissions for non allocated RB:带内发射对非分配RB影响试的设置Test set up f o r PUSCH In-band emissio ns measur ement#RBRB Po s/St ar t RBMo dul at i o nUE Out put Po werTest set 118Lo wQPSK3.23.2dBmTest set 218HighQPSK3.23.2dBmTest set 318Lo wQPSK-26.83.2dBmTest set 418HighQPSK-26.83.2dBmTest set 518Lo wQPSK-36.83.2dBmTest set 618HighQPSK-36.83.2dBmROHDE&SCHWARZ Jun 2011 I LTETest l 马志聪，RS_SZ 51TFIK Year sof,Ml l l nlDr iving Inno vat io nIn-band emissions for non allocated RBYear s o fDr ivingInno vat io nTiirF wiiiiiROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 52Inband emissions3 t ypes o f inband emissio ns:gener al,DC and IQ imageUsed15LTELTE Measuiemeiit-Mul ti Ev.il uMionCyc l ic Pr ef ix:Nor malSettings-15Tr igger-25-35Mo de:FDD Fr equenc y.1930.00000 MHz Ref.Level:Inband EmissionsOf f y.Mul t i Eval uat io n%c hannelbandwidt hal l o c at io n Of f y:B5 90 954555NoRB:/Al l o c at io n2Aver ageMin25 OffcetRB:Cm r entTX Po wer Peak Po wer RB Po wer20.25 dBm26.63 dBm6.30 dBm20.27 dBm26.89(IBin6.30 IBni20.17 dBm26.48 dBm6.22 dBm20.28 dBm27.25 IBm6.30 IBmStdDev 0.01 dBm 0.23(IBm 0.00 IBmDispl ayMar kerSt at ist ic Co unt Out o f To l er anc e Det ec t ed Mo dul at io n View Fil t er Thr o ughput(Repetition.StopCondition.Statistic Count.ChannelBandwidth.Assign ViewsConfig.c hannel bandwidt hTPiirF wiiiiiYear s o fDr ivingInno vat io nROHDE&SCHWARZ Jun 2011 I LTE Test i 马志聪，RS_SZ 53Inband emmission error casesDC c ar r ier l eakage due t o IQ o f f setDr ivingf W Year s o fWil Dr iving“Ul l ini Inno vat io nROH