CFAR

哈尔滨工业大学（威海）本科毕业设计（论文）-I-摘要雷达恒虚警技术，是雷达设计的关键技术之一。本论文主要研究了各种恒虚警处理器在多种检测场景的性能分析以及对比。根据高斯白噪声通过平方律检测器为指数分布的信号模型，仿真产生了目标遮蔽场景，杂波边缘场景。通过单元平均恒虚警的算法，分析了单元平均恒虚警处理器在上述场景中的性能，研究了一些改进的处理器算法。针对目标遮蔽效应，设计了单元平均选小恒虚警处理（SOCACFAR）、审核式恒虚警处理器（AuditCFAR）、排序式恒虚警处理器（OSCFAR）。针对杂波边缘效应，分别研究了单元平均选大恒虚警处理器（GOCACFAR）、开关式恒虚警处理器（SwitchingCFAR）。完成了算法编程及其评估。验证了恒虚警算法的有效性和正确性。研究了一种综合的处理方法VICFAR处理器，完成了其在杂波边缘场景和目标遮蔽场景和其他处理器的对比分析，验证了这种处理的优点。关键词恒虚警；检测场景；杂波边缘效应；目标遮蔽效应；单元平均；恒虚警处理器哈尔滨工业大学（威海）本科毕业设计（论文）-II-AbstractRadarCFARtechnique,isoneofthekeytechnologyofradardesign.ThispapermainlystudiesthevariouskindsofCFARprocessorsperformanceanalysisandcomparisonofdetectingscene.UnderGaussianwhitenoisethroughthesquare-lawdetectorforsignalsoftheexponentialdistributionmodel,andobscuredtargetsthesimulationscene,clutteredgescene.ThroughcellaverageCFARalgorithms,analysisofcellaverageCFARprocessorperformanceinthesceneabove,researchanumberofimprovedalgorithmforprocessor.Targetingtheshadowingeffect,designedtheaveragesmallselectionCFARprocessingunit(SOCACFAR),audit-CFARprocessor(AuditCFAR),sort-CFARprocessor(OSCFAR).Edgeeffectforclutter,hasstudiedcellaverageCFARprocessorselection(GOCACFAR),switch-CFARprocessor(SwitchingCFAR).Completedalgorithmprogramminganditsevaluation.VerifythevalidityandcorrectnessoftheCFARalgorithm.KeywordsDetectionofsceneClutteredgeeffectsTargetshadowingeffectsCellaveragingCFARprocessor哈尔滨工业大学（威海）本科毕业设计（论文）-III-目录摘要.....................................................................................................................IAbstract................................................................................................................II第1章绪论...........................................................................................................11.1课题背景..................................................................................................11.2课题来源、目的和意义..........................................................................11.3主要研究内容..........................................................................................21.3.1均值类CFAR处理算法...............................................................21.3.2有序统计量类CFAR处理算法...................................................31.3.3删除单元平均的CFAR处理算法...............................................31.4本文结构..................................................................................................3第2章单元平均CFAR..........................................................................................42.1单元平均CFAR的检测场景..................................................................42.2单元平均CFAR的概念..........................................................................62.2.1单元平均CFARM门限的推导...................................................62.2.2单元平均CFAR分析...................................................................82.3恒虚警损失..............................................................................................92.4单元平均CFAR的局限........................................................................112.4.1目标遮蔽效应.............................................................................112.4.2自遮蔽效应.................................................................................142.4.3杂波边缘效应.............................................................................162.5本章小结................................................................................................17第3章单元平均CFAR的改进算法...................................................................183.1均值类CFAR.........................................................................................183.1.1单元平均选小CFAR..................................................................183.1.2单元平均选大CFAR..................................................................203.1.3开关式CFAR..............................................................................223.2有序统计类CFAR.................................................................................243.2.1排序式CFAR.............................................................................243.2.2审核式CFAR..............................................................................27哈尔滨工业大学（威海）本科毕业设计（论文）-IV-3.3一种综合的CFAR.................................................................................283.3.1VICFAR原理介绍......................................................................283.4本章小结................................................................................................31第4章CFAR的性能对比....................................................................................334.1恒虚警率验证........................................................................................334.2目标遮蔽效应下的性能对比分析........................................................334.3杂波边缘效应下的性能对比分析........................................................364.4本章小结................................................................................................39结论...................................................................................................................40致谢..............................