一种空间不可分辨多目标存在性检测的新方法  

A New Method for Detecting the Presence of Multiple Unresolved Targets

作　　者：赵锋[1] 毕莉[1] 闵涛[1] 王雪松[1] 肖顺平[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《电子学报》2010年第10期2258-2263,共6页Acta Electronica Sinica

摘　　要：在弹道导弹防御中,空间不可分辨多目标对地基防御雷达的跟踪、识别和制导均构成了严重威胁,雷达必须采取特殊手段来对其进行处理,而对其存在性的检测则是其他所有处理的前提和基础.实验表明,当存在不可分辨多目标时,线性调频脉冲信号脉冲压缩输出主瓣的相位将发生剧烈变化,而在单目标条件下则相对缓慢,这就为不可分辨多目标存在性检测提供了新的思路.本文提出了采样相位差模型,分析推导了单目标和多目标条件下采样相位差的统计特性,并以此为依据,采用广义似然比检测法对不可分辨多目标的存在进行检测.最后,蒙特卡洛仿真结果验证了本文算法的有效性和可行性.In ballistic missile defense,the situation of unresolved targets is of great threaten to the tracking,identification and guidance of ground based radars,and some special efforts must be adopted to deal with it,among which the detection of the presence of unresolved targets is the precondition and basis of all the others.It is indicated by tests that,when multiple unresolved targets exist,the main lob＇s phase of LFM pulse compress output changes tempestuously,other than single target case where the phase changes tardily.The difference between those two cases above can provide a new way to detect the presence of unresolved targets.In this paper,the model of sample phase error is put forward,and its statistic characteristics under the condition of single target and multiple unresolved targets are derived.Based on what above,a general likelihood ratio test is developed to detect the presence of unresolved targets.Finally,the Monte Carlo simulation result identifies the validity of the models.

关 键 词：线性调频脉冲 相位特性 不可分辨多目标 采样相位差 广义似然比 

分 类 号：TN95[电子电信—信号与信息处理]