一种复合高斯背景下失配信号抑制的自适应检测器  

An adaptive detector for rejecting mismatched signal in compound Gaussian clutter

作　　者：杨海峰[1] 胡晓琴[1] 李振兴 张东霞[1] YANG Haifeng;HU Xiaoqin;LI Zhenxing;ZHANG Dongxia(Air Force EarlyWarning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院,武汉430019

出　　处：《空天预警研究学报》2022年第4期247-251,共5页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

摘　　要：针对复合高斯杂波背景下存在信号导向矢量失配时的自适应目标检测问题,研究了一种对失配信号抑制性能较好的自适应检测器.首先通过在目标不存在的假设中引入虚拟干扰;然后基于两步广义似然比检验(GLRT)准则推导了GLRT检测器;在此基础上,为进一步提高检测器对失配信号的抑制能力,结合GLRT检测器的具体形式,对GLRT检测器进行了改进,得到了对失配信号具有更强抑制性能的改进检测器.理论分析和仿真结果表明,在匹配信号检测性能下降值可以容忍的前提下,所提出的自适应检测器具有较好的失配信号抑制能力.There exits the problem of adaptive target detection with mismatched signal guiding vectors in the compound Gaussian clutter background. In view of this, the paper studies an adaptive detector with good performance in rejecting mismatched signals. First, a fictitious jamming is introduced under the target absent hypothesis,and then based on the two-step generalized likelihood ratio test(GLRT) criterion is derived the GLRT detector. On this basis, in order to further improve the inhibition ability of the detector to the mismatched signals, the paper combines with the specific form of the GLRT detector to modify it, and thus obtains the improved detector with stronger inhibition performance to the mismatched signals. Theoretical analysis and simulation results show that the proposed detector achieves better performance for rejecting mismatched signal under the premise that the degradation value of matching signal detection can be tolerated.

关 键 词：复合高斯杂波 信号失配 广义似然比检验 自适应检测 

分 类 号：TN957[电子电信—信号与信息处理]