一种基于强散射中心的距离扩展目标检测方法

Spatially Distributed Target Detector Based on Scatterer

针对高分辨率雷达距离扩展目标检测问题,利用广义似然比检验,提出了一种基于强散射中心的恒虚警检测器。首先,以较高的第一虚警概率设置第一门限,提取强散射中心,然后针对强散射中心采用广义似然比方法得到检测统计量,并与基于第二虚警概率的检测门限进行比较,判断目标有无。仿真实验表明,这种检测器在已知和未知散射中心空域分布时都要优于SDD-GLRT(Spatial scattering density-generalized likelihood ratio test)检测器,并且具有鲁棒性。

Aimed at the spatially distributed target detection of the high resolution radar, a constant false alarm rate detector is proposed by a generalized likelihood ratio test based on strong scatterers. Firstly, the information of target scatterers is obtained by setting a first threshold with a higher false alarm probability. Then, the detection statistic is formed based on the generalized likelihood ratio test compared with the second threshold. Experimental results show that the proposed detector outperforms the SDD-GLRT （Spatial scattering densitygeneralized likelihood ratio test） detector whether the SDD is known or unknown, and the detector has the robustness.