基于正交投影的子带信息几何雷达弱小目标检测方法杨政程永强*吴昊黎湘王宏强(国防科技大学电子科学学院长沙410073)摘要:基于信息几何理论的雷达目标检测是一种新兴的技术,它将目标检测问题转化为流形上目标与杂波的区分问题,在低信杂比检测中具有优势。对于复杂背景下的弱小目标检测,目标与杂波难以区分,限制着检测性能。因此,该文基于矩阵信息几何检测器,提出一种基于正交投影的子带信息几何目标检测方法。该文利用滤波器组对雷达回波信号进行子带分解,并在矩阵流形上稳健估计子带内强杂波信号子空间,提出基于流形的正交投影方法以抑制强杂波,增强目标与杂波的区分性。最后,采用仿真数据和实测海杂波数据验证所提方法的有效性。结果表明,所提方法能够有效抑制强杂波,具有较好的检测性能。关键词:雷达弱小目标检测;信息几何;矩阵流形;子带分解;正交投影;杂波抑制中图分类号:TN957.51文献标识码:A文章编号:2095-283X(2023)04-0776-17DOI:10.12000/JR23079引用格式:杨政,程永强,吴昊,等.基于正交投影的子带信息几何雷达弱小目标检测方法[J].雷达学报,2023,12(4):776–792.doi:10.12000/JR23079.Referenceformat:YANGZheng,CHENGYongqiang,WUHao,etal.Subbandinformationgeometrydetectionmethodbasedonorthogonalprojectionforweakradartargets[J].JournalofRadars,2023,12(4):776–792.doi:10.12000/JR23079.SubbandInformationGeometryDetectionMethodBasedonOrthogonalProjectionforWeakRadarTargetsYANGZhengCHENGYongqiang*WUHaoLIXiangWANGHongqiang(CollegeofElectronicScienceandTechnology,NationalUniversityofDefenseTechnology,Changsha410073,China)Abstract:Herein,anovelandeffectivemethodfordetectingradartargetswithalowsignal-to-clutterratioisproposedbasedontheinformationgeometrytheory.Intheproposedmethod,thetargetdetectionproblemisconvertedtodistinguishingthetargetfromaclutterbackgroundonamanifold.However,thisischallengingwhendealingwithsmallandweaktargetsembeddedinacomplexandstrongclutterbackground,whichlimitsthedetectionperformance.Therefore,toaddressthisissue,anorthogonalprojectionbasedsubbandinformationgeometrydetectionmethodisproposed.Inthismethod,thereceivedradarsignalundergoessubbanddecompositionbyadesignedfilterbank,andtherobustestimationofclut...