无线移动通信系统的设计与实现

TRF6900MSP430F149,,,(,710049),,TRF6900,TIMSP430F149900MHz,TRF6900:,,TRF6900,MSP430:TN929.5:20052062170TRF6900TI850MHz950MHzISM(),VCO()PLL(),11D/A24,FM/FSK[1],,,,,,[2],TFR6900,TI16MSP430MSP430F149,3V,1TFR6900TRF6900[1]RFPLLVCODDS();RSSI()FM/FSK,TRF69003(DATA,CLOCK,STROBE),CLOCK,MSP430F14924DATADDS,STROBE,,DDSPLL,TX_DATADDS,DDS11D/A,PA_OUT,LAN_INTRF6900,,13dB3.3dB:,,;,,LAN_OUTMIX_IN,MIX_OUT;,IF1_IN,1,7dB,IF1_OUTIF2_IN,2,80dB,FM/FSK,DATA_OUT1.1,(/),TRF6900,,11,R18C50,R18,R19,,R191M5M,C50C5120pF30pF868MHz870MHz1232120061ELECTRONICENGINEERVol.32No.1Jan.2006©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:fBW=11f2BW1+1f2BW2(1):fBW;fBW1;fBW2:QIF=fcfBW(2):QT=fc1.5fBW=QIF1.5(3)fc10.7MHzSEFCV107,10.7MHz,3dB15040kHz,150kHz:fBW106.066kHz,QIF=100.88,QT=67.25,L=2.2H,QL78,RLinC:RLin=QL2fcL11.537(k)C=142f2cL100(pF)10k,13C542220061©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(PC)224:TRF6900RF2436;TRF6900MSP430F149;MSP430F149MAX202RS2232;MAX202PC(9DPC)4MSP430F149MAX202MAX202,3,,:MSP430,,,,receive_RFsend_RFRS_23233,,IAREmbeddedWorkbench3.045432321,:TRF6900MSP430F149©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1].MSP430.:,2002[2]..:,2003[3].MSP43016.:,2004DesignandImplementationofaDigitalWirelessMobileCommunicationSystemBasedonTRF6900andMSP430ChenJian,YangZhengkun,TongShicun,WeiFen(XianJiaotongUniversity,Xian710049,China)AbstractAimingtosolvetheproblemsofcollectingdatafromundergroundrestrictedspace,highfrequencywirelessmobilecommunicationsystemhasbecomeamainsolutionbecauseofitshighreliability,convenienceandlowcost.ThispaperanalyzesthefunctionsofTRF6900anddemonstratesthepracticalappli2cationofittoconstructingawirelessmobilecommunicationsystemtogetherwithMSP430onfrequencyof900MHz.TheexperimentalresultshowsthatTRF6900iswelladaptedtobeusedindevelopingthelowpower2consumptionundergroundwirelessmobilecommunicationsystem.Keywords:wirelessmobilecommunication,RFtransceiver,TRF6900,MSP430(20)DesignandImplementationofCostasLooponFPGAPlatformZhangAnan,DuYong,HanFangjing(NationalUniversityofDefenseTechnology,Changsha410073,China)AbstractCostasloopisaclosedself2adjustingsystem,usuallyusedtoextractreferencecarrierinsuppressedcarrierphasemodulatedsystems.Anall2digitalCostasloopcarrierrecoverycircuitisimplementedonFPGA(FieldProgrammableGateArray).Thebasicprincipleisintroduced,andparametersanddesignofeachpartofthelooparedescribedindetail.Finally,theRTL(ResistorTransistorLogic)schemeandtestda2taareprovided.Simulationresultsshowthathighperformancecanbeachievedusingthiskindofall2digitalCostasloop.Keywords:Costasloop,FPGA,carriersynchronization4220061©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.