Adaptive detection of range-spread targets in homogeneous and partially homogeneous clutter plus subspace interference  

作　　者：JIAN Tao HE Jia WANG Bencai LIU Yu XU Congan XIE Zikeng 

机构地区：[1]Research Institute of Information Fusion,Naval Aviation University,Yantai 264001,China [2]Air Force Early Warning Academy,Wuhan 430019,China

出　　处：《Journal of Systems Engineering and Electronics》2024年第1期43-54,共12页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61971432);Taishan Scholar Project of Shandong Province(tsqn201909156);the Outstanding Youth Innovation Team Program of University in Shandong Province(2019KJN031)。

摘　　要：Adaptive detection of range-spread targets is considered in the presence of subspace interference plus Gaussian clutter with unknown covariance matrix.The target signal and interference are supposed to lie in two linearly independent subspaces with deterministic but unknown coordinates.Relying on the two-step criteria,two adaptive detectors based on Gradient tests are proposed,in homogeneous and partially homogeneous clutter plus subspace interference,respectively.Both of the proposed detectors exhibit theoretically constant false alarm rate property against unknown clutter covariance matrix as well as the power level.Numerical results show that,the proposed detectors have better performance than their existing counterparts,especially for mismatches in the signal steering vectors.

关 键 词：adaptive detection subspace interference constant false alarm rate Gradient test partially homogeneous environment 

分 类 号：TN974[电子电信—信号与信息处理]