伪码调相连续波雷达模糊函数推导及仿真分析

伪码调相连续波雷达模糊函数推导及仿真分析曹军亮,牟连云,杨网成,杨慧(,211800):,,,,13Barker63m,,,:;;13:TN958.94:A:CN32-1413(2011)01-0064-04DeductionandSimulationAnalysisonTheAmbiguityFunctionofPRC-CWRadarCAOJun-liang,MOULian-yun,YANGWang-cheng,YANGHui(NavyCommandCollege,Nanjing211800,China)Abstract:Thispaperanalyzestheperformanceofthepseudo-randomcodecontinuouswave(PRC-CW)radar,researchestheoperationtheoryofPRC-CWradar,emphaticallydeducestheambiguityfunctionofPRC-CWradar,simulatestheradarsignalbycomputer,bycomparingthesimulationd-iagramsbetween13-bitBarkercodephasemodulationsignaland63-bitmsequencephasemodula-tionsignal,provesoutthatthelongcodemodulationsignalsimulationdiagramisthebestselectionforPRC-CWradars,andinordertorealizethebetterrangemeasurementandspeedmeasurement,theside-loberestraincircuithastobeaddedorthebettercodebeselected.Keywords:pseudo-randomcodecontinuouswaveradar;ambiguityfunction;13-bitBarkercode0引言,,,,,,,,,1伪码调相连续波雷达原理,,:m,;Barker,,13;Tay-lor,(2T)(T),,,Barkerm,,1,/0:2010-04-0320112Feb.2011341SHIPBOARDELECTRONICCOUNTERMEASUREVol.34No.1,,;,,(),,1,:(1),,(2)60,Goddard,,D,,,;,,(3)(LPI),,,/0,,,,,,(4),,,,,N,,,,,,,,,,,,,,,,,,,2伪码调相连续波雷达模糊函数,20702:|x(S,N)|2=|Q+]-]u(t)u*(t+S)exp(j2PNt)dt|2(1)651::x(S,N)=Q+]-]u(t)u*(t+S)exp(j2PNt)dt(2):s(t)=a(t)ejU(t)ej2Pf0t(3):u(t)=a(t)ejU(t)=1PEP-1k=0ckv(t-kSc)(4)a(t)=1PSc,0tPSc0,(5):Pm;Scm;U(t)0P,:ck=ejU(t)=+1,-1;v(t),ckm;a(t):u(t)=v(t)á1PEP-1k=0ckD(t-kSc)=u1(t)áu2(t)(6)u1(t)=v(tSc)=1Sc,0tSc0,(7)u2(t)=1PEP-1k=0ckD(t-kSc)(8),:x(S,N)=u*(-S)á[u(S)ej2PSN](9)(9),:x(S,N)=u*1(-S)áu*2(-S)áu1(S)áu2(S)exp(j2PNS)=x1(S,N)áx2(S,N)exp(-j2PSN)(10):x1(S,N)x2(S,N)u1(t)u2(t),u1(t),[10],:x1(S,N)=(1-|S|Sc)sin[PN(Sc-|S|)]PN(Sc-|S|)(11):|S|[Sc,,0x2(S,N)=1PEP-1i=0EP-1k=0Q]-]cickD(t-iSc)D(t+S-kSc)#exp(j2PNt)dt=EP-1i=0EP-1k=0cickexp(j2PNiSc)(12)x1(S,N),P-1,:x(S,N)=EP-1m=-(P-1)exp[-j2P(S-mSc)N]#(1-|S-mSc|Sc)sin[PN(Sc-|S-mSc|)]PN(Sc-|S-mSc|)#EP-1i=0EP-1k=0cickexp(j2PNiSc),|S-mSc|Sc(13)3伪码调相连续波雷达模糊函数仿真与分析13Barker63m(10GHz,50ns)213Barker,,13Barker,2vS,vS,13,1,-22.3dBBarker,,,-22.3dB,213Barker363m363m,636634m,,-19.1dB,13Barker,413Barker,Barker/0,,5,,,6,413Barker513Barker613Barker,63m74,,63m/0,1,,863m,9,,763m863m963m4结束语(下转第105页)671:E12:E12=E(1)(12)LM(30):E(1)(12);L;ME(1)(12)R,kHkR2~R3:E(1)(12)=QLF(x)dx(31):F;LR3,,R:E(1)(12)DK0R3{[l0+l1(R-R0)]v2+l2E2M(lm-R0)}(32):R3;R0;v;EM;l0,K0,l1,l2,lm,lm\R0R3v2,E2M(R3REM),():E2=1GnEn+1GMEM+EM2(33):GnGM;E;M25结束语/0,,:G111E111=G112E112,:E22,,,,S111(),I111E111DI112E112,,,E21,,,E22,[1].[M].:,2003.[2]EB.[M]..:,1987.[3].[M].:,2000.(上接第67页),,,,,[1].[D].:,2009.[2].[D].:,2004.[3].X[D].:,2006.[4],.mMatlab[J].(),2008,22(4):139-141.[5],.Taylor[J].,2005,28(2):26-28.[6].[D].:,2003.[7].[J].,2002,17(2):7-10.[8].[J].,2003(18):24-25.[9]BassemRMahafza.[M].:,2008.[10].[D].:,2000.1051: