线性FMCW雷达动目标一维距离像运动补偿

21120062CHINESEJOURNALOFRADIOSCIENCEVol.21,No.1February,2006104100520388(2006)0120104205FMCW3(,[e-mail],610054)FMCW,,,,,,DFCFMCW,,TN911AMotioncompensationof12DrangeprofileforlinearFMCWradarDUYu2mingYANGJian2yu(CollegeofElectronicEngineering,UESTC,[e-mail],ChengduSichuan610054,China)AbstractLinearFMCWradarisakindofhigh2range2resolutionradar,andmotioncompensationisakeyproblemtorealizehighrangeresolution.Amultiplerepeti2tionfrequencywaveformisadoptedandaDopplerfrequencycluster(DFC)algo2rithmisproposed,whichiscapableofrecoveringtruevelocityfromthecoupledve2locityestimationdirectly.Aimingatsolvingresolutionofmultipletargets,amatchalgorithmbasedonmeansquareerrorisalsoproposed.Thecombinationofthea2bovetwomethodsrealizesdistanceandvelocitydecouplingformultiplemovingtar2gets.Theresultofsimulationverifiedtheeffectivenessofthemethods,thevelocityestimateperformanceofDFCalgorithmimproveobviouslycontrasttoChinesere2maindertheorem.KeywordslinearFMCWradar,dopplerfrequencycluster,motioncompensation1FMCW[2][3]FMCW,,FFT,[1][2][3],1,,,,M.Musa,[4],:1);2)[5]3)(Dopplerfrequency3:2004206217cluster:DFC),,,[6][7],2FMCWFMCW1,1n:1LFMCWST(n,t)=Ae-j2[f0(t-nTr)+0.5u(t-nTr)2]+0(1),u=B/T,nSR(n,t)=krST(n,t-n(t)),kr,n(t)n,:n(t)=2R0c-2tc=0-2c=n-2(t-nTr)c(2)(2),0,nn,nnn,n:SB(n,t)=krA2e-j2[fb,n(t-nTr)-12ub(t-nTr)2]-jb,n(3)k=2/c,(3),,fb,nun-fd,ub2uk,b,n=2(f0n-12u2n)=2(f00-12u2n)-2nfdTr,fd(3),,fb,n,ub,b,:SB(f,n)=Ke-j2nfdTr(4):K=krE4Dbej(u0-fd-f)22kuej2(f00-0.520+fdT/2){[c(2,n)-c(1,n)]-j[s(2,n)-s(1,n)]}(5)(5),E=A20T/2,,Db=2kD(D=BT,),c(.),s(.)Bb,n,:1,n=[-Bb,n/2-(fb,n-f)]/ub/22,n=[Bb,n/2-(fb,n-f)]/b/2(6),fd,MTD,,,|fdTr|1[1]|fdTr|1,,,,FdFd=fd-Mfr(7)fr=1/Tr,,M0SB(f,n),fb,n,:Rm(n)=cfb,nT2B=R0-nTr-cfdT2B=Rn-cfdT2B=Rn-Rd=Rn-fdTRbin(8)Rd,Rbin,3mm,5m/s,3.33,RdRm(n)Rn,Rd,3(DFC),N2,MTD,N,Fd(i),i[1N],,,:fd(i,m)=Fd(i)+mfr(i)m[-MM](9):fr(i)i;Fd(i)5011:FMCWi;m,M=round(fd2max/fr(i)),fd2max,fd2oDFCCd(j)=1N6j+N-1k=j|fd_o(k)-fd_o(j)|2(10)jCd(j)DFC:{fd_o(j),fd_o(j+1)fd_o(j+N-1)},fd_o(j)=1N6j+N-1k=jfd_o(k)(11)fd_o(j)jDFCCd(j)DFCDFC,DFCDFC2DFC,5,6,7Hz,2,4,3Hz,Cd(1){2,4,3},Cd(1)=2.333,Cd(26)=0,{52,52,52},52Hz2DFC(:Hz)DFC,,4,,,,-FFT,-,CFAR,mnn,,:mmax=max(m1,m2,,mN):P=[P(1),P(2),,P(j),P(mmax)]Kmmax(12)P(j)j,mmaxj1Kj:K=7Nn=1mnmnmmax(13)P(j)=[P(j,1),,P(j,k),,P(j,K)]T(14)(14)P(j,k):P(j,k)=1N6Nn=1[s(n)-€s]2(15)€s=1N6Nn=1s(n)(16)(16){s(n)}Nn=1,€s,T1T2TN,,:R1R2RNif0R1R2RNif0(17)(17),K,P(j,k)j5fr(1)=500Hz,fr(2)=611Hz,fr(3)=721Hz,f0=35GHz,B=150MHz3200Monte2Carlov=33m/s,R=100m,:,DFC60121,,,4dB,DFC6dB,DFC3DFC:R=20018050-1215,SNR=0dB4(a)(b)(c)3500Hz,611Hz,721Hz-(a)(b)(c)4-4(a),,,4(b)4(c),,DFC:^R^=200.0624179.978649.9977-12.52096,,FMCW,-[1]BarrickDE.FM/CWradarsignalsanddigitalpro2cessing[R]1NOAATechnicalReportERL2832WPL26,1973.[2]Stove,AG.LinearFMCWradartechniques[J]1Ra2darandSignalProcessing,IEEProceedingsF,1992,139(5):3433501[3]Griffiths,HD.NewideasinFMradar[J]1Electron2ics&CommunicationEngineeringJournal,1990,2(5):1851941[4]MMusa,andSSalous.AmbiguityeliminationinHFFMCWradarsystems[J]1IEEProceedings2Radar,SonarNavig.,2000,147(4):182188.[5]TrunkGV,KimMW.Multipletargetambiguityres2olution[J].RadarConference,1994.,Recordofthe1994IEEENational,2931March1994,9194.(116)7011:FMCW[J].,1999,14(2):160165.ZJi,BHLi,HXWang,etal..Propagationpredictioninindoorenvironmentsusingray2tracingtechnique[J].ChineseJournalofRadioScience,1999,14(2):160165.[6],,,.[J].,2003,18(4):428432.YMHuang,YHLu,LXu,etal..Predictionofradiowavepropagationfromoutdoortoindoorusinganim2provedhybridmethod[J].ChineseJournalofRadioScience,2003,18(4):428432.[7]JWalfischandHLBertoni.AtheoreticalmodelofUHFpropagationinurbanenvironments[J].IEEETrans.AntennasPropagat,1998,36(12):17881796.[8]JWalfischandHLBertoni.PropagationPredictionModels[R]1COST231FinalReport,1988.[9]WCYLeeandDJYLee.Microcellpredictionindenseurbanarea[J].IEEETrans.Veh.Technol.,1998,47(2):246253.[10]YOda,KTsunekawa,andMHata.AdvancedLOSpath2lossmodelinmicrocellularmobilecommunica2tions[J].IEEETrans.Veh.Technol.,2000,49(11):21212125.[11],,,.GSM[M].:,2003.[12]WCYLee.MobileCommunicationsDesignFunda2mentals,2ndEdition[M].Wiley2Interscience,1993.[13].[D].,2002.[14]RappaportTS.WirelessCommunications:PrinciplesandPractice,SecondEdition[M].PrenticeHall,2002.(1975-),,,,,(1946-),,,,,Email:[e-mail](1957-),,,,,GPSEmail:[e-mail](107)[6],,.FMCW[J].,2004,26(2):169173.[7],.[J].,2003,(4)5345381(1977-),,,19992002,LFMCW,(1963-),,,1991,,,:LFMCW,,,61121