摘要
针对普通积累检测器检测稀疏散射点目标存在"坍塌损失"以及依赖于散射点密度的二元积累(SDD-BI)检测器检测密集散射点目标存在信杂比损失的问题,该文充分利用目标的散射点密度及幅度信息,提出了一种距离扩展目标的双门限恒虚警检测器(DT-CFAR),在高斯杂波背景下推导了DT-CFAR虚警概率和检测概率与检测门限关系的解析表达式,并给出了最优第1门限的确定方法。仿真结果表明,DT-CFAR对不同散射点密度目标都具有较优的检测性能,并且对散射点密度估计失配具有鲁棒性。
For the problem of normal integrator exists serious ＂collapsing loss＂ when detecting spare scatterer targets,and Scatterer Density Depend-Binary Integrator（SDD-BI） exists signal to clutter ratio loss when detecting dense scatterer targets,a Double Threshold-Constant False Alarm Ratio（DT-CFAR） detector of range-spread target is proposed by using the density and amplitude of a target scatterer.The formula relating false alarm probability and detection probability to detection threshold is deduced in the Gaussian clutter background,and the optimal first threshold for different target parameters is given.Experiment results show that DT-CFAR has better detection performance for diverse scatterer density targets and has robustness when the scatter density of a target is estimated mismatching.
出处
《电子与信息学报》
EI
CSCD
北大核心
2012年第6期1318-1323,共6页
Journal of Electronics & Information Technology
基金
国家自然科学基金(61032001
61102166)资助课题
关键词
目标检测
距离扩展目标
双门限
恒虚警率
Target detection
Range-spread target
Double threshold
Constant False Alarm Rate（CFAR）
