Persymmetric Adaptive Detectors of Subspace Signals in Homogeneous and Partially Homogeneous Clutter

Leida xuebao

卷:4

Guan Jian¹  Ding Hao¹  Xue Yong-hua¹  Huang Yong¹ 

[1] Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University;

关键词: Adaptive detection;    Generalized Likelihood Ratio Test (GLRT);    Persymmetry;    Subspace signal;    Partially homogeneous clutter;   

DOI  :  10.12000/JR14133

来源: DOAJ

【 摘 要 】

In the field of adaptive radar detection, an effective strategy to improve the detection performance is to exploit the structural information of the covariance matrix, especially in the case of insufficient reference cells. Thus, in this study, the problem of detecting multidimensional subspace signals is discussed by considering the persymmetric structure of the clutter covariance matrix, which implies that the covariance matrix is persymmetric about its cross diagonal. Persymmetric adaptive detectors are derived on the basis of the one-step principle as well as the two-step Generalized Likelihood Ratio Test (GLRT) in homogeneous and partially homogeneous clutter. The proposed detectors consider the structural information of the covariance matrix at the design stage. Simulation results suggest performance improvement compared with existing detectors when reference cells are insufficient. Moreover, the detection performance is assessed with respect to the effects of the covariance matrix, signal subspace dimension, and mismatched performance of signal subspace as well as signal fluctuations.

【 授权许可】

Unknown