城市智能交通信息发布系统的关键技术研究

上海交通大学硕士学位论文城市智能交通信息发布系统的关键技术研究姓名：傅宇辉申请学位级别：硕士专业：模式识别与智能系统指导教师：刘允才20080101ivNHKDARCDataBroadcastingSystemMSKGISGeographicInformationSystemv,,,LMSKviDesign&TestofUrbanTrafficInformationBroadcastingSystemABSTRACTInthispaper,thedesigned,constructionandtestofaFMmultiplexbroadcastingsystemisreported.ThephysicallayeranddatalinklayerofthisbroadcastingsystemhasbeendesignedbyreferringtotheDARCprotocol.Theprotocolhasbeenprovedtobebothofhightransmissionspeedandofgoodmobilereceptionperformance.Theuniquepointsofourworkisthatweconstructedthephysicallayerbyembeddedsystemanddigitalelectronictechniquesandwerealizedmostofthefunctionofthedatalinklayerbysoftwareprogramming,i.e.theencodingofdataanddecodingofdatacouldallbedonebysoftwareprogram,integratedintothetrafficanalysisplatformwedevelopedpreviously.Thisisprovedtobemoreeconomicalandmoreflexiblecomparingwithanall-hardwaresystem.ThesystemisalsocombinedwiththevehiclenavigationsystemdeveloppedbyPioneerandthedigitalmapsystemofNaviInfo.Thedynamictrafficstatecouldbereflectedonthedigitalmaponthenavigatornow.Preliminaryexperimentsofthissystemhavebeencarriedout.Thepreliminaryresultsareprovedtobepromising.KEYWORDSIntelligentTransportationSystemsDynamicVehicleNavigation,FMMultiplexing,DataBroadcastingSystem,DDS,CRC,ShortenedMajorityDecodabledifferencesetcycliccode,LMSKii_____”20082182008218iii2008218-1-1.1ITS1.2[]-2-IntelligentTransportationSystemsIntelligentTrafficSystemsITSITS(1)(2)/(3)[1](ATIS),(ATMS)(APTS)(AVCS)(TCS)(ETC)(EMS)11[2]-3-11Fig1-1:DifferentlevelsofIntelligentTransportationSystems-4-1.2.11990HVTS[3][4][5][6]1198420009ATISSOS80TRAVTEK3ITS-5-ITS3ITS12ITS(ITI)ITIITSITSITIITS2VICSVehicleInformation&CommunicationSystemATISAdvancedTrafficInformationService(TOCTrafficOperationsCenter)TOCITSBeacon(VICS)VICS201503(ETC)ETC1998ETC(AHS)3-6-ERTICO(EuropeRoadTransportTelematicImplementationandCoordinationOrganization)1991CEN/TC278ISO/TC204SOCRAIESEuroScoutTrafficMasterATIS1996ATIS1.2.22070ITSITS2010ITSITSITSITSITSITSITS70808090ITS1623-7-7153427ITS70[7][8]70808090CAD90ITSGIS11Table1-1:MainworkofChinainITS(SSTCC)(ERTICO)19976ATMSGISInternet-8-ITS200311ITS“2007ITS”200410ITSITSITSITS1.2.3200120041400-5002840SCATS3GPS20057000GPS5000-9-974277607502002030InternetGPRS/CDMAInternetGPRS/CDMA207007500-10-1520%100010KW1.31.3.11.3.2NHKDARCDataBroadcastingSystem-11-LMSKDDSMSK-12-2.1Pilot19KHz238KHz±15KHzL+RL-R2-1Fig.2-1PrincipleofFMMultiplex&itsspectrum10KW1000-13-2.22.2.1RDSRADIODATASYSTEMRDS1984EBU1187.5bit/sPSK19KhHz357kHzRDS(±2.4kHz)SCANHK1988NHK()48kbits76kHz(4DPSK)NHK-14-MOSAIC67kHz92kHz9.6kbits10kHz19.2kbitsSCA6kHz10kHzDBC(DataBroadcastingCorporation)198310SCA69kHz9600FSK2kHz5kHzSCA053kHz10060dB53kHz99kHz10060dBDARCDARCDARCNHK(NipponHosoKyokai)-15-RDSNHKDARC(kbit/s)(kHz)RDS1.18752-PSK57NHK484-PSK76RBDS1.18752-PSK57MOSAIC9.619.2N/A6796DARC16LMSK7621Table1-1:GeneralizationofworldFMMultiplexSystem2-12-22-2Fig.2-2SpectrumoftheMultiplexingSystemslistedabove-16-2.2.2DGPS-17-DARC3.1(1)1-1Pilot19KHz238KHz±15KHz87MHz108MHz200KHz53KHz47KHz4L-MSK()-18-(2)-19-(3)4L-MSK-(4)3-1Fig.3-1PasswayCircuitofMultiplexofTrafficData&RadioProgram/DARC-20-3.-3.23.3.1-21-±75kHz110±82.5kHzA±75kHz30±75kHz20B±75kHz10±75kHz20C303.3.276kHz100HzA.20kHz99kHzB.53kHz99kHzC.20kHz99kHz3.3.387-108MHzFM76KHz20dB58.5KHz-93.5KHz+/-4.5KHz-22-LMSK()L-R41016kbps2.5%-50dB10kLMSK1008M1M3.387MHz108MHz200KHz,,,100KHz0Hz53KHz47KHz2.2.1RDSNHKMOSAICDBCDARC53KHz-100KHz-23-RDSDARCRDSDARC2-2RDSRadioDataSystem55.8KHz58.2KHzRDS1.1875kbps/SDARCDataRadioChannel476KHz-20dB35KHz16kbps/SLMSKDARCFinaldraftofETSIEN300751V1.2.1(2002-09)Radiobroadcastingsystems;DAtaRadioChannel(DARC);SystemforwirelessinfotainmentforwardingandTele-distribution[11]DARC3.4[9],,,,(53kHz~100kHz)-24-3-3L-R2353kHz3-2,3-33-2Fig.3-2IdealFMMultiplexSpectrum-25-3-3Fig.3-3RealFMMultiplexSpectrumwithMulti-pathInterference3.5DARCLMSK[10]3.5.1MSKLMSKMSKMinimumphaseShiftKeyingFSK()FSKMSKMSK(FFSK)(0.5)bTFSKCPFSK-26-()cos[()]CPFSKcStAttωθ=+(1)()tθ01ω12ωcωω∆()cos[(0)]CPFSKcStAttωωθ=±∆+(2)122cωωω+=(3)212ωωω−∆=(4)12()(0)ttθωθ=±∆+(5)(0)θFSK2bTnωπ∆=nω∆n1ω∆/2bTωπ∆=(6)21/2bffTβ∆==(7)fβ5-1301/4bfT∆=(9)21/2bfT∆=(10)1/bTCPFSKMSK6-27-/2bTωπ∆=(11)5()(0)2bttTπθθ=±+(12)(0)0θ=12()2bttTπθ=±(13)l0btT=12/2,1()(0)/2,0bTπθθπ−=−(14)0t133-4()tθ3-410/2π/2πbT/2πbT/2πMSK()tθ/2π1101000-28-3-4aMSK01Fig.3-4(a)WaveformofMSKNoticethatbinarydata‘0’&’1’correspondtodifferentfrequency3-4bMSKFig.3-4(b)PhasechangeofMSK12(t)2kkbtaTπθθ=+(15)kal153-4kθπMSK()()k-1bkbkTkTθθ=16-29-151MSKc()cos()2MSKkkbtstAtaTπωθ=++17sin0kθ=()[()cos()cos()sin()sin]22MSKIcQcbbttstAattattTTππωω=−c[()cos()sin]cAIttQttωω=−(18)()()cos()2IbtItatTπ=()()sin()2QbtQtatTπ=()cosIkatθ=()cosQkkataθ=18MSK3-5bTcos()2btTπsin()2btTπ1/4MSKMSK3-5MSKFig.3-5MSKmodulator3-3L-R2353kHzDARCLMSK[3]LMSKMSKL-R3-6L-RL-R[12]-30-4-10DARCDARCDARC10DARC3-6LMSKFig.3-6LMSKSignalControlLevelProportion3-7MSK3-7LMSKFig.3-7HowtogenerateLMSKSignal,atheoreticalblockdiagramMSKL-R3-6-31-L-R3.5.2LMSKDDS[11]MSKLMSK3-83-176kHz+4kHz80kHz176kHz-4kHz72kHz03-8MSK3-1Fig.3-8Transmissionsideband-p