强海杂波背景下的远距离微弱信号检测

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1、堕型堕兰型垫叁堂堡±堂堡鲨奎．——ABSTRACTSeaclutteristhebackscatteringechofromtheseasurfacewhichisirradiatedbytheradartransmittedsignal．Astheseaclutterrestrictthedetectionofradarechowhichincludethe··Doint”targetfromtheseasurface(includeships，maritimebuoyageandcivilianfishingboats，etc．)，SOt

2、hedetectionofremoteandweaksignalinthestrongseaclutternotonlyhavetheoreticalimportance，butalsohavepracticalimportance．ThispaperbringstheTsallisdistributionintotheseaclutternonstationarymodel，andpresentsamothodofgoodness—of-fittoTsallisdistributionusingK．S．throughcombiningNel

3、der—Mead．Atthesametime，lettheTsallisdistributionfitthedatameasuredbytheIPIXradar，throughtheanalysisofthedifferentoftheparameters，presentamethodoftargetdetecionusingthesingleparameter，Drovidinganewmethodfbrthedetectionofremoteandweaksignalinthestrongseaclutter．Themainworkint

4、hispaperincludesthefollowing：1．Statethecauseofrisingresearchontheseaclutterfromdomesticandforeign，andexpoundpresentresearchsituationinthreeaspectsofseacluttermodeling，seacluttersimulationandtargetdetectionintheseaclutter；IntroducetheIPIXradar，dataformatmeasuredbvtheIPIXrade

5、randthemethodofprocessingtheseaclutterdatausingMatlab；Analvzetheseacluttercharacteristicsfromseaclutterscatteringcoefficient，seaclutterstatisticaldistribution，seaclutterspectrumandtime、spatialcorrelation；Comparethetwokindsofseacluttersimulationmethodofzeromemorynonlinearity

6、methodandsphericallyinvariantrandomprocessmethod．2,RealizetheamplitudefittingofRayleighdistribution，Lognormaldistribution，WeibulldistributionandKdistribution，fourseacluttermodelsbasedonstatisticaldistributionrelativethedatemeasuredbytheIPIXrader，usingtheMaxinumlikelihoodest

7、mation，andmomentestimation．andanalyzestheimpactoftheparametersforeachstatisticaldistributionmodelbasedtheseexperments．3．ResearchtheseacluttercharacteristicsofnonlinearityusingthedatemeasuredbytheIPIXrader．Doexperimentsfromthereaspectsofdopplerspectrum，dopplercentroidandseac

8、luttertexture．Theresultprovesthattheseaclutterhasthecharacteristicsofnonlinearity．