基于精確電磁建模的散射中心成像.pdf

1、電子科技大學(xué)碩士學(xué)位論文基于精確電磁建模的散射中心成像姓名：劉偉申請學(xué)位級別：碩士專業(yè)：電磁場與微波技術(shù)指導(dǎo)教師：胡俊20080501———————————————叢墼璺!LAbstractTheemergenceofimagingRadarexpandedtheoriginalconceptofrad甄ith嬲theabilitytoimageandidentifythemovmgobject(aircrafts，missiles，e

2、tc)，regionaltargets(mountains，cities，etc)，showsgreaterpotentialinmicrowave豫notesensillgapplications111，providespeoplewithmoreandmorousefuliIl硒mtationnalsoh蠲afarreachingimpactandsignificanceinnationaldefensemodenlizationa

3、11dthed酬opmentofnationaleconomyThereforetheradarimagingtechnologyisbeingmore勰dmoreinternationalattentionandconcern，intensecompetitio風(fēng)rapidtechnologicaldevelopmentareas1n僦entyears，theresearchofinversesyntheticaperturerada

4、rOSAR)imagingiswlde踺，readconcernedbothathomeandabroadpeoplehadputforwardav撕e～ofmotioncompensationmethodandimagingalgorithmInordertoova℃omettledifficultyofprocessinginradarsignaltransmitandreceivemod鋤radarso‰、陽如mllighfreq

5、uencyInhighfrequencyradartargetscatteringCanbemodeledbvmultiplesc蜘gcentersapproximationTherefore，thestudyofinversesyntheticapcffuremdar蚰姆ng15basedOilthemodelofmultiplescatteringcentersInthispap％tlleett咖vcnessofthescatter

6、ingcentermodelisexplainedfromthe郵pectiVeofelectromagnetismInadditiontheeffectivenessofthemethodrequiredbeingtestedbytllem錢圓刪dataHowevertheobtainingofthemeasureddataisverydi伍cultandtak銘alotoftlllle，manpowerandmaterialreso

7、urcesBenefitfromthedevelopmentofcomputational硝ec缸Dma印etlsm，thenumericalsimulationCanbeusedtoobtaintheimagingda饑hltlffspaperitdisseussesthemainmethodstocomputethescatterdataitelaborates廿1em幽dtoobtainthetimedomainbackwaveb

8、ythefrequencydomaincomputatio蹦methodBecausethegeneralobjectoftheinversesyntheticapertureradarisnonc00peratedmotioncompensationmustbecarriedoutbeforeimagingInthispaperitbrieflyiIl仃0dllcessomeofthecurrentmethodsofmovementc