基于俯仰维信息的机载雷达非均匀杂波抑制方法

 针对机载雷达天线非正侧放置导致的非均匀杂波抑制问题,从利用阵面俯仰维信息的角度出发给出了一类解决方法.本文首先分析了机载雷达阵面非正侧放置情况下待检测距离单元的杂波构成,得到由俯仰副瓣引入的近程杂波是导致杂波非均匀的关键因素这一结论;然后给出了利用俯仰自适应波束形成级联两维空时自适应处理(2D STAP)方法来抑制非均匀杂波,同时从本质上阐述了俯仰-方位-多普勒3D STAP方法在非均匀杂波环境下具有良好杂波抑制性能的内在机理.最后通过仿真验证表明,利用俯仰维信息类STAP方法在非正侧阵导致的非均匀杂波环境下具有良好的杂波抑制性能.

Elevation-Based Methods for Nonhomogeneous Clutter Suppression in Airborne Radar

For suppression of nonhomogeneous clutter which is induced by array's non-side looking placement in airborne radar,this paper presents a class of STAP methods using array elevation information.Firstly,we analyzed the clutter components of the tested range cell for non-side looking array,and put forward the idea that near clutter induced by sidelobe of elevation leads to the clutter range dependence.Then the conclusion is achieved that the elevation information of antennas help to suppress the nonhomogeneous clutter based on above analysis,and a hybrid STAP method for nonhomogeneous clutter suppression is presented.Furthermore,we present the internal mechanism of how 3D STAP effectively solve the range dependent clutter nonhomogeneity problem.Finally,the simulation results illustrate the effectiveness of the elevation-based STAP methods for nonhomogeneous clutter suppression.