GPS+L2信号USB中频数据采集实验平台设计

南京航空航天大学硕士学位论文GPSL2信号USB中频数据采集实验平台设计姓名：邓庆鹏申请学位级别：硕士专业：通信与信息系统指导教师：宋茂忠20061201IGPSGPSGPSGPSGPSGPSGPSL2(CM/CL)GPSL2GPSL1GP2015L2USB2.0PCGPSL2CGPSGP2015USBUSBWindowsUSBPCUSBFPGAC/AGPSL2CUSBGPSL2USBIIAbstractWithGPSapplicationfieldsceaselessnessgoesdeepintoandexpandedDemandofcivilcustomerstoGPSsystemisgettinghigherandhigher.LegacyGPSsystemshasrevealedoutafewshortcomingsanddeficiencyintheprocessofusage.USAMinistryofNationalDefencehassuggestedGPSModernizationformakingGPSsystemadapttonowadaysdevelopmentofsocietyneeds.AremarkableimprovementistoaddCiviliancodetoL2wavebandaftertheGPSModernization.Tosatisfytheimprovement,thispaperdesignsakindofGPSL2signalintermediatefrequencydataacquisitionexperimentalplatform.Thepaperdetaileddescribestheplatformfromantennapart,RFfront-endanddataacquisitionpart.Theantennapartchoicesspiralantennawhichworksonaxismode,RFpartusestraditionalGPSL1ReceiverRFcomponentsdesignL2RFmodule,RFsignaldown-convertedtodigitalIFthroughfourstagefrequencyconverters.TheacquisitionpartadoptsUSB2.0port,DigitalIFdatawillbetransmitedtoPCwiththisport.ThepaperanalysesGPSModernizationanditsinfluence,thestructureofthenewL2CsignalandGPSreceiverRFfront-enddesignrequirements,designsRFfront-enddesignplanbasedonGP2015chip.ThepaperresearchestheprincplesofdataacquisitioninterfaceandUSBportcircuit,developsUSBfirmwareprogram,WindowsdriverprogramandPCapplicationprogram.AtlastwetesttheacquisitionfunctionbyuseofC/AcodeproducedbyFPGA.Keywords:GPSModernization,L2Csignal,RFfront-end,USBcollectorV1.1GPS...................................................................................31.2.........................................................................................32.1GPS....................................................................................82.2GPS................................................................................................82.3GPSL2......................................................92.4C.....................................................................................92.5L2C.....................................................................................102.6C...................................................................................103.1...................................................................................133.2GPSL2.....................................................................153.3.......................................................................................163.4TXCO...............................................................................173.5GP2015................................................................174.1USB......................................................................................204.2NRZI................................................................................................224.3USB..........................................................................................234.4USB..................................................................................................245.1FX2..................................................................................265.2FX2FIFO................................................................285.3FX2EEPROM............................................................................295.4CY7C68013....................................................................305.5FIFO....................................................................................305.6...........................................................................................325.7.......................................................................366.1WDM...................................................406.2WDM...............................................................................416.3USBDIWDM.........................................................................427.1PC.................................................................................48GPSL2USBVI7.2USB..........................................................................517.3.......................................................................................527.4C/A..................................................................527.5.......................................................................................537.6C/A..................................................................5311.11973NavigationSatelliteTimingandRanging/GlobalPositioningSystem(GPS),,2080,GPSGPSGPSL1C/AL1L2PGPSSA()GPSGPSGPSGPS[1]1L1C/A2L2L134GPSGPSGPS(IGEB)GPS(GIAC)(ION)GPSGPS[1]L2(L2C)L5GPSGPSSAGPSL1GPSL2GPSL1GPSGPS[2]GPSGPSL2USB2GPSGPSGPSL2CL5PCIUSBWindowsPCIUSBUniversalSerialBusPCUSB1994PCUSB2.0USB480Mb/sUSBPCUSBGPSUSBGPSL2USBGPSPCUSBPC1.2GPS1.1GPSA/DGPS[3]3/A/DAGCGPSRFLOs1.1GPSGPSGPSPC1.2[4]GPSGPSLNAUSBPCTXCOIFRF1.22-2USBPCGPSL2GPS()GP2015GPSL2USB4USBCypressFX2CY7C68013PCGPSMATLABC1.3GPSL2USB1GPSGPSL2CCM/CL2GPS3GPSGP20154USB5CY7C68013USBCY7C68013GPS6WindowsUSB7PC8FPGAC/AGPSGPSL2CGPSL2USB2.0USBUSBUSBPC5GPSL2CGPSGP