虽然雷达的分辨率不断提升,但在处理多目标的过程中不可避免地会出现难以区分的情况。这种多目标集合称为群目标,在雷达的常规线性处理下具有不可分辨特性,普遍存在于防空、反导等重要领域,严重制约了雷达的探测能力。文中首先分析了雷达分辨机理,指出了参数化模型是群目标分辨的基础;然后给出了阵列雷达单脉冲原理,指出阵列雷达单脉冲与极大似然估计具有一致性;在此基础上,针对目标数预知的群目标场景,介绍了自适应单脉冲和四通道单脉冲两类群目标分辨方法,可实现群目标精确测角。

It is inevitable that the radar cannot resolve multiple targets even though the radar resolution is greatly improved. Such a set of multiple targets, also called as unresolved targets, are unresolved when directly using the conventional linear processing and widespread in the radar application, e. g. air defense and anti-missile fields. Radar performance is greatly limited by the unresolved targets. In this paper, the radar resolution mechanism is given. It is deduced that the parametric model owns the super resolution capability. Then the consistence between array monopulse and maximum likelihood is analyzed. On this basis, considering the scenarios of multiple targets where the targets number is pre-known, two approaches of adaptive monopulse and four-channel monopule for accurate angle measurement of multiple targets are introduced.

TN95