高速铁路宽带无线信道测量方法研究

335Vol.33No.520115JOURNALOFTHECHINARAILWAYSOCIETYMay2011:1001-8360(2011)05-0048-06高速铁路宽带无线信道测量方法研究刘留1,陶成1,邱佳慧1,余立2,董伟辉2(1.,100044;2,100053):,,;,,,,,,:;;:TN929.5;U285.21:Adoi:10.3969/j.issn.1001-8360.2011.05.009ResearchonBroadbandWirelessChannelSoundingMethodsforHigh-speedRailwayLIULiu1,TAOCheng1,QIUJia-hui1,YULi2,DONGWe-ihui2(1.InstituteofBroadbandWirelessMobileCommunications,BeijingJiaotongUniversity,Beijing100044,China;2.ResearchInstituteofChinaMobile,Beijing,100053,China)Abstract:High-speedrailwayhavedevelopedremarkablyinChina.However,thereexistsatechnologybottle-neckindevelopmentofthegroundon-boardbroadbandwirelesscommunicationsystem.Beyondthebasicspeechcommunication,broadbandwirelessdatatransmissiondemandsforpassengerservicesarerisingandalargeamountofrea-ltimeon-boardtrainoperationinformationneedstobetransmittedtothegroundmonitor&controlcenter.Therefore,itisessentialtobuildthecut-inbroadbandwirelesssystemadaptabletohigh-speedrailways.Thewirelesschannelmodelisthebasisofdesignofthecommunicationsystem.Inthispaper,againsthigh-speedscenarios,weanalyzetheparticularitiesofwirelesschannelsounding,discusstheadvantagesanddisadvantagesofclassicalsoundingmethodanddevicesandproposeanovelschemeofbroadbandwirelesschan-nelsoundingbasedonwirelesscellnetworks.Keywords:wirelesschannelofhigh-speedrailway,channelsounding,timevaryingchannel,,,,();,,,:2010-10-07;:2010-12-15:(61032002);(2009JBZ003):(1981)),,,E-mail:[e-mail],,3GPPBaseStation(BS)RadioTransmissionandReception(Release9)[1]LOS(LineofSight),U,,,LTELTE-A1(),,:,,,,,:,[12],,,ElektrobitPropSoundMEDAVGmbHRUSK,,:(1)GSM-R,2G3G4G,,(m,),(2),,,,,,(3),360km/h(100m/s),1km,10s,;GSM-R,BBU(BaseBandUnit)RRU(RemoteRadioU-nit),1,RRU,RRU,Doppler,,,2,[3-4]2.1(),,,,2,Td,Tp,Tp,Td/0,,DopplerPA-PR(PeaktoAveragePowerRatio),,/02.2PAPR,m3,m,,,$S=Tc(1)495[5]C=A/A-B(2),A,B,,,,,(),2.3,,4,,,,,,,,,,RUSKMSSS(MulticarrierSpreadSpectrumSignal),OFDM()[6];-(SophiaAntipo-lis)EURECOMMIMOChannelSounder(EMOS)IEEE802.11aOFDM,FFT64[7],:(1)PAPR,,,;(2),,,,ICI[8]ICI[9]3,,MEDAVRUSK[6],ElektrobitPropSound[10],/0,TDM(TimeDivisionMultiple-xing),5m,n,T1,m;T2,T2,,Rx-1~Rx-n;GI,Ts,Ts,T1=m@T2(3)T2=(Ts@n+TGI)@m(4)(3)(4),,T1,,Dopplerfmax,,T1=1/2fmax(5)RUSKPropsound,,ULA(UniformLinearArray),UCA(UniformCircularArray),UCA(UniformRenctan-gularArray),6,RUSKRimax,PropSoundISIS(Initializa-5033tionandSearchImprovedSAGE),RUSKPropSound,1[13]2[10,14]1RUSK879kHz~120MHz640Msamp/s900MHz~66GHz8bit2W()15GBGPS80MHz24V2PropSound200MHz2.1GHz~2.7GHz,5.1GHz~5.9GHz120GB26dBm()GPSm12V4,,,:(1):-,485km,WCDMA()3G,,,;,3G,,BBU+RRU3G,,(2):2GGSM200kHz,5Ls3G,WCDMA3.84MHz,0.26Ls;CDMA20001.25MHz,0.8Ls;TDS-CDMA1.6MHz,0.625Ls;TD-LTE20MHz,0.05Ls3GTD-LTE,(3),:,3G,,,;TD-LTE,;,,,WCDMA,TD-LTE,:(1)WCDMAWCDMA(DS-CD-MA)(FDD),3.84Mchip/s,5MHz,WCDMA,73WCDMA[15-16]WCDMA,CPICH(CommonPilotChannel)CPICH,CPICH0000,,,,,IQ,I1,Q1OVSF(Cch,256,0),,51583WCDMA:1940~1955MHz:2130~2145MHz:2132.6MHz2137.6MHz2142.6MHzBPSK,QPSK3.84Mchip/s2Mbit/s(forRelease99&Release4)10ms(15)666.7LsWCDMARake,,Finger,Fin-gers,WCDMA,,RakeCPICH,,,9,/0,,,,,,(2)TD-LTETD-LTE3G,3G,OFDMMIMO20MHz100Mbit/s50Mbit/sTD-LTEOFDMA,TDD2,5ms8DwPTS(DownlinkPilotTimeSlot)GP(GuardPeriod)UpPTS(UplinkP-ilotTimeSlot)3,4[17]4TD-LTE2.6GHz(2570MHz~2620MHz)BPSKQPSK8PSK16QAMQPSK16QAM64QAM2Mbit/s(Release99&Release4)10ms(2),,LTE,10eNodeB,,,,FPGADSP,,GPS,,,115,,:5233;,,,,,,,,,,,,,5100MHz16bit2.1GHz~2.6GHzPCI-EGPS2T70M/GPS200Msamp/s12V5,,:[1]3GPP.TS36.104BaseStation(BS)RadioTransmissionandReception(Release9)[S].2010.[2],,,.[J].,2010,26(6):95-101.TAOCheng,LIULiu,QIUJia-hui,etal.ArchitectureandKeyTechniquesofBroadbandWirelessAccessSystemforHighSpeedRailway[J].TelecommunicationsScience,2010,26(6):95-101.[3]THOODORESRappaport.[M].,.:,2008.[4]FAILLIM.DigitalLandMobileRadioCommunications-COST207FinalReport[R].Brussels,Belgium:EuropeanCommission,COSTOffice,1989.[5]COXDC.DelayDopplerCharacteristicsofMultipathProp-agationat910MHzinaSuburbanMobileRadioEnviron-ment[J].IEEETransactionsonAntennasandPropaga-tion,1972,20(5):625-635.[6]MEDAVGH.WidebandChannelSounderRUSKTMMI-MOTechnicalAnnex[R].2010.[7]EURECOM.MIMOChannelSounder(EMOS)[EB/OL].[8]ZHAOY,HUANGA.ANovelChannelEstimationMethodforOFDMMobileCommunicationSystemsBasedonPilotSignalsandTransform-DomainProcessing[C]//ProceedingsofIEEEVehicleTechnologyConforence,Vol.3,Phoenix,AZ,USA:1997,2089-2093.[9]TAOCheng,QIUJia-hui,LIULiu.ANovelOFDMChannelEstimationAlgorithmwithICIMitigationoverFastFadingChannels[J].Radioengineering,2010,19(2):347-355.[10]Elektrobit.PropSoundTMCSMult-iDimensionalChannelSounderGeneralpresentation[R].2005.[11]RICHTERA.OntheEstimationofRadioChannelPa-rameters:ModelsandAlgorithms(RIMAX)[D].Ph.D.Dissertation,TUIlmenau,Ilmenau,Germany:2005.[EB/OL].Available:[12]FLEURY,BH,JOURDANP,STUCKIA.High-reso-lutionChannelParameterEstimationforMIMOApplica-tionsUsingTheSAGEAlgorithm[C]//Proceedingsof2002InternationalZurichSeminaronBroad