第1期2023年1月电子学报ACTAELECTRONICASINICAVol.51No.1Jan.2023和差天线空时自适应测角方法及性能分析阚庆云，许京伟，廖桂生（西安电子科技大学雷达信号处理国家重点实验室，陕西西安710071）摘要：雷达模拟和差天线技术通过射频功率合成器形成和差波束，在目标角度测量中应用广泛，然而运动平台雷达经过空时自适应处理（Space-TimeAdaptiveProcessing，STAP）后难以还原鉴角曲线，即自适应处理后的等效鉴角曲线与静态鉴角曲线发生偏离.针对此问题，本文提出和差天线体制雷达空时自适应测角方法.该方法通过和差STAP算法抑制杂波后实现角度估计，并且通过理论推导建立了角度估计与和通道输出信噪比、差通道剩余杂噪比之间的关系，重点分析了杂波剩余对角度估计的非一致性影响.仿真实验验证了本文方法的有效性.关键词：运动平台雷达；和差天线体制；空时自适应处理；杂波抑制；单脉冲测角基金项目：国家自然科学基金（No.61931016，No.62071344）中图分类号：TN959.73文献标识码：A文章编号：0372-2112(2023)01-0042-08电子学报URL:http://www.ejournal.org.cnDOI:10.12263/DZXB.20211458AngleEstimationApproachandPerformanceAnalysisforSTAPwithSum-DifferenceAntennaKANQing-yun,XUJing-wei,LIAOGui-sheng（NationalLaboratoryofRadarSignalProcessing,XidianUniversity,Xi’an,Shaanxi710071,China）Abstract:Analogsum-differenceantennaradarformssum-differencebeamthroughradiofrequencypowersynthe⁃sizer,whichiswidelyusedintargetangleestimation.However,afterspace-timeadaptiveprocessing(STAP),itisdifficultformovingplatformradartorestoretheangleidentificationcurve,thatis,theequivalentangleidentificationcurveafteradaptiveprocessingdeviatesfromthestaticangleidentificationcurve.Tosolvethisproblem,thispaperproposesaspace-timeadaptiveangleestimationmethodforSTAPwithsum-differenceantennasystem.Inthismethod,theangleestimationisrealizedaftersuppressingclutterbysum-differenceSTAPalgorithm.Therelationshipbetweenangleestimationandtheoutputsignal-to-noiseratioofthesumchannel,residualclutter-to-noiseratioofthedifferencechannelisestablishedbythe⁃oreticaldeduction.Thispaperanalyzestheinfluenceofclutterresidueontheinconsistencyofangleestimationemphatical⁃ly.Simulationresultsver...
