SAR课程实验报告

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1、SARImagingBasedOntheRangeDopplerAlgorithmIntroductionAfterthecourseRadarImaging,IdidasimulationexperimentinwhichItrytouseRangeDopplerAlgorithm(RDA)forSARImaging.Hereismyreportfortheexperiment.Inmysimulationexperiment,Igotanidealresultof3pointtargetsimagingbasedontheRDAontheconditionofhighsquint.Fi

2、rstofall,Iwouldliketogivetheparametersusedinmysimulation.ParametersValueUnitssignalfrequency(fc)10GHzsignalbandwidth(Bf)100MHzpulsewidth(町)6.667USFMslopeofdistance(Kr)15MHz1psthesamplingfrequencyofrange(fs)150MHzflyingspeed(V)150m/sthesamplingfrequencyoforientation(PRF)300Hzobliquedistanceofpointt

3、argetcenter(尺))25.6kmSyntheticaperturelength(L)512mthepixelsamplingintervalofrange(Pixel_r)1mthepixelsamplingintervalofazimuth(Pixel_a)0.5mresolutionofrange(p_r)1.5mresolutionofazimuth(p_a)0.75mSquintangle(&)20degThenitistheflowchartofthealgorithm.RawradardataResultOutputResultanalysis!•Theechosig

4、nal2一M）+WH（je）S°（r）+认）h⑴Hrc（Z-）=exp{^：}Kr口（车、f—j兀f：1WhiletheSRCfilteris（力）=*xp{'}Thesetwofilterscanbecombinedasonefilter:H〉fJ=exp（呼}WherecompressionandSRC.hisisthesignalafterrange3・RangeCellMigrationCorrection（RCMC）Themigrationfactor»（£，％•）=ThephasemultiplierGrcmc=exp{：：：響}•exp{}£>(£,’.)cc4.Azimut

5、hCompressionWhereocistherangeofthescenecenter.hisisthesignalafterRCMC.AfterRCMC,amatchedfilterisappliedtofocusthedataintheazimuthdirection.Theresultisasfollow:Thisistherequiredresult.竹二exp{Dataafterazimuthcompression.ConclusionAfterdoingthissimulation,IlearnedmoreonSARimaging.Ifsthepracticalknowle

6、dge・IunderstoodhowtoachievethealgorithmwithIDLinsteadofjustunderstandingitonthebook.ButIrealizethatnomatterthealgorithmortheunderstandingofSAR,onwhichmystudyisstillprimary.Fmlookingforwardtoaccessmoreandgodeeperinthisfield.CODE；==二二矩形窗函^==================================functionrect,tsizearr=size(

7、t)ff=fltarr(sizearr(l))index=where(abs(t)le0.5)ff(index)=l.return,ffend=雷达参数=:c=double(3.e8)lamd=double(0.03)fc=double(c/lamd)Br=double(l.e8)Kr=double(1.5el3)Tu=double(Br/Kr)fs=double(Br*1.5)PRF=double(300.0)Vi-=