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一种二次监视雷达接收机灵敏度的自动测量方法 Title:AnAutomatedMethodforMeasuringtheSensitivityofaQuadratureDopplerRadarReceiver Abstract: ThispaperpresentsanovelautomatedmethodformeasuringthesensitivityofaquadratureDopplerradarreceiver.Themethodutilizesasecondarymonitoringradartogeneratetargetsignalsofknownamplitudeatdifferentdistancesandanglesfromthereceiver.Thereceiver'ssensitivityisthendeterminedbyanalyzingthereceiveroutputcorrespondingtothesetargetsignals.Experimentalresultsdemonstratetheeffectivenessandaccuracyoftheproposedmethodincharacterizingthereceiver'ssensitivity. 1.Introduction: Inradarsystems,sensitivityplaysacrucialroleindeterminingthesystem'sabilitytodetectweakradarechoesfromfardistances.Thesensitivityofareceiverdirectlyimpactsaradarsystem'soverallperformance.Hence,accuratelymeasuringthereceiver'ssensitivityisofgreatimportancetoensureoptimalperformance.ThispaperproposesanautomatedmethodthatutilizesasecondarymonitoringradartomeasurethesensitivityofaquadratureDopplerradarreceiver. 2.Methodology: 2.1Setup: Thesetupforthesensitivitymeasurementconsistsoftheprimaryradarsystem,thesecondarymonitoringradar,andthetargetobjects.Theprimaryradarsystemisresponsibleforcollectingandprocessingthedata.Thesecondarymonitoringradargeneratestargetsignalswithknownamplitudesatvariousdistancesandanglesfromthereceiver.Thetargetobjectsactasreflectors,reflectingthetransmittedsignalsfromtheprimaryradarsystem. 2.2PulseRepetitionFrequency(PRF)Generation: ThesecondaryradarisequippedwithacontrollablePRFgenerator,whichallowsforthegenerationoftargetsignalsatdifferentranges.ByvaryingthePRF,thesecondaryradarcanproducetargetsignalsatvariousdistancesfromthereceiver.Thisensuresthatthereceiver'ssensitivityistestedunderdifferentsignalstrengths. 2.3AnglePreparation: Tomeasurethereceiver'ssensitivityatdifferentangles,arotatingplatformisused.Thetargetobjectsareplacedontheplatform,enablingthesecondaryradartogeneratetargetsignalsatdifferentangles.Theplatformrotatesatapredefinedspeed,ensuringconsistentanglesofincidencefo