RFID读写器接收机基带数字信号处理研究

RFID1,2,2(11,518055;21,510310):RFID,.,AlteraFPGA.RFID.:RFID;;;:TN911125:A:037222112(2009)0621382204StudyandDesignofBase2BandDigitalSignalProcessforUHFRFIDReadersReceiverWUYUNGao2wa1,LUJun2,WURong2hua2(11ShenzhenPolytecnic,Shenzhen,Guangdong518055,China;21ChinaElectronic&TechnologyGroupNo.7Institute,Guangzhou,Guangdong510310,China)Abstract:ByanalysisthefactorswhichaffectofUHFRFIDreadersdigitalreceiver,makeitclearbetweensignalnoisefirsttime,DCoffsetandreceiverperformance.AnoveldesignofBase2banddigitalsignalprocessmethodforZero2IFreceiverispresent2ed,suchasoversamplefiltering,DCoffsetadjustandcorrelationdecodetosolvethisproblem.ThemethodsareimplementedonAl2terasFPGAandgotbetterperformancethanothermethods.Keywords:RFIDreader;Zero2IF;DCoffset;base2banddigitalsignalprocess1RFIDISO/IEC,EPC,,[1],,RFID.RFID.,.RFID,UHFISO/IEC1800026C[2],.,(ASK),.CW,.,,,.RFID1.,LNA,IQ.:2008212215;:2009204226620096ACTAELECTRONICASINICAVol.37No.6Jun.2009,.,(EIRP),(25dB),,.2RFID.,.,.[3],:rREADER=c2G2RG2T2SNRPDATAPPN1/4,C,,,,GR,GT.PPN,(SPA).PDATA,.,,(SNR),.,;,,,,.,.,35,,.,,.,,.ADC,,.3,,ASK.:.311,,..,,ADC.CIC,,FIR,,.250kbpsASK,ADC,40,20MSPS.8,2Mbps,CIC3.FM0,2,,215,,650kHz;V,160kHz,.2.312:,,.[4],,,.[5],,.38316:RFID..,,..,.p2p.:y(i)=x(i)+(C-i+N/2-1j=i-N/2x(j)N)CADC,i,x(i),y(i),N,j.,,.313.,,,1,0.,..,.FM0,:T0|si(t)sj(t)|dt=s2i(t),0,,S0S1FM001.,S0S1,01.,.S0S1,,.22%,.[6],FPGA.,324,,.4,AlteraCycloneIIFPGA,ADCFIFOCIC,FPGACPU,CPU.AlteraIP.30dBm,915MHz,7dBi,Alien.8m,250kdBs.ADC3(,.).,I.,,.,p2p110,,.CIC,4.,,.(,01;.2B40,240).240(1B51,01),.,5..,240(1B50),48312009,EPC.5RFID,.,,.,10m,,..:[1],.DSP[J].,1999,27(7):27-30.LiShuangtian,etc.TheresearchesonalgorithmsandDSPim2plementationofaHFdigitalreceiver[J].ActaElectronicaSini2ca,1999,27(7):27-30.(inChinese)[2]ISO/IEC1800026:Part6:ParametersforAirInterfaceCommu2nicationsat860960MHz[S].2004.6[3].(RFID)[D].:,2007.FANZhi2guang.StudyonSeveralProblemsinUltraHighFre2quencyRadioFrequencyIdentification[D].Hangzhou:ZhejiangUniversity,2007.(inChinese)[4],.[J].,2008,5(3):48-50.HUXue2hui,etc.ADC2offsetajusttechnologyforzero2IFre2ceiver[J].SpaceElectronicTechnology,2008,5(3):48-50.(inChinese)[5]AsadA.Abidi,Direct2ConversionRadioTransceiversforDigi2talCommunications[J].IEEEJournalofSolid2StateCircuits,1995,30(12):1339-1410.[6],.FPGARFID[J].,2007,33(13):230-232.HUANGChenling1,etc.DesignofRFIDdigitalreceiverbasedonFPGA[J].ComputerEngineering,2007,33(13):230-232.(inChinese):,1971,,.:,.E2mail:[e-mail],1971,1993,.:,,.E2mail:[e-mail],1982,2008,.:RFID,,FPGA.E2mail:[e-mail]58316:RFID