复合高斯杂波下距离扩展目标的OM-GLRT  

OM-GLRT of Range Spread Targets in Compound Gaussian Clutter

作　　者：陈远征[1] 范红旗[1] 付强[1] 

机构地区：[1]国防科学技术大学ATR实验室,湖南长沙410073

出　　处：《信号处理》2008年第5期718-721,共4页Journal of Signal Processing

摘　　要：广义似然比检测(Generalized Likelihood Ratio Test,GLRT)是解决复合高斯杂波下距离扩展目标检测问题的一种有效方法,而当目标速度未知时,对于毫米波等高频雷达而言,速度估计误差将造成方向矢量(steering vector)失配,从而导致GLRT性能的严重下降。此时,如何设计最佳的GLRT检测器就成为一个优化问题。本文在分析方向矢量失配对GL- RT影响的基础上提出了一种最优匹配GLRT(Optimum Matched GLRT,OM-GLRT)方法。仿真结果表明,OM-GLRT能有效地实现对速度未知目标的检测。GLRT is an efficient method to resolve the detection problem of range spread targets in compound Gaussian clutter. But the performance of GLRT will decrease greatly with the mismatch of steering vector because of the unknown velocity of the target. So, the problem of designing optimum GLRT turns out to be the optimizing problem. In this paper,we proposed an OM-GLRT to improve the performanee of GLRT. The results of simulation show that OM-GLRT can detect the target with unknown velocity efficiently.

关 键 词：复合高斯杂波 距离扩展目标 方向矢量 失配 GLRT 

分 类 号：TN957.51[电子电信—信号与信息处理] TP391.41[电子电信—信息与通信工程]