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1、ABSTACTIIIABSTRACTTheclassificationofhelicopter,turbojetaircraftandpropaircraftisofgreatimportance.Sincetherotorstructureshavethetypicalmicro-motions,themicro-Dopplerinformationcontainedintherotorstructurescanbeutilizedtorealizetheclassification,butthecluttersornois
2、esintheechoesdescendtheclassificationperformance.Basedontheanalysisofthemicro-Dopplereffectsofthethreekindsofairplanes,thisdissertationmakesresearchesonrobustclassificationalgorithmsforairplanetargets.Themaincontentsofthedissertationareasfollows:1.Basedonthelawofrot
3、ationforsimplescatteringpoints,weestablishthesignalformulaforthemicro-motionofairplanetargets.Thethreetraditionalcluttersuppressionmethods,i.e.,MTI,CLEANandgeneralizedmatchedfilter(GMF),areintroduced.Wemakeananalysisandcomparethethreeschemesindistortiononthemicro-Do
4、pplersignal,usageofpriorinformationandcomputationburden.2.Inordertosuppressthepossiblecluttersinnarrowbandradarechoes,especiallytheweatherclutter,weproposeanareaCLEANbasedsuppressionanddenoisingmethod,whichutilizesthecluttersamplestoestimateitsDopplerrangeintheechoe
5、s.Theexperimentalresultsbasedonthesimulateddataverifytheeffectivenessoftheproposedmethod.3.InordertosolvetheproblemsofthehighcomplexityandlargecomputationburdernoftheGMFmethod,weproposeadenoisingmethodbasedonwhiteningfilterwithlowdimensionalityforeigenvaluespectrumf
6、eatures.Thecomputationburdernforcluttersuppressionoftheproposedmethodisonly13ofthatoftheGMFmethod.Inaddition,thenewmethodcanrealizenotonlythecluttersuppressionbutalsothenoisereduction.Theclassificationexperimentsbasedonthemeasureddataverifytheeffectivenessofthenewme
7、thod.Keywords:Micro-Doppler,Narrowbandradar,Cluttersuppression,CLEAN,GeneralizedMatchedFilter(GMF),Robustclassification万方数据目录V目录摘要..............................................................................................................................IABSTRACT.
8、.................................................................................................................III第一章绪论.................
