基于Hausdorff距离的相控阵雷达波束指向侦察方法研究

The Method to Reconnoiter the Main Beam Direction of Phased Array Radar based on the Side Beam Surveying

针对相控阵雷达航迹欺骗干扰存在的难以确定主波束指向的问题,提出利用相控阵雷达波束扫描时旁瓣的变形对主波束指向进行侦察的方法。首先定性分析了旁瓣变形与主波束指向的关系,证明了这种方法的可行性,之后利用曲线相似原理,对旁瓣的变形进行测绘与识别。针对侦察中存在的方向图难以确定的问题,提出利用先期侦察信息通过计算确定粗略的天线方向图,之后利用微似比在计算方向图的基础上确定主波束指向的角度范围,最后利用Hausdorff距离在这一角度范围内再精确确定主波束的指向,仿真结果表明了这种方法的有效性。

Considering that it is difficult to measure the direction of the main beam for the track deception jamming of phased array radar, a new measure theory based on the distortion of side beam when scanning the radar is given. Firstly, the relationship between the distortion of side beam and the direction of the main beam which indicates the feasibility of this theory is analyzed. Then the distortion of side beam is surveyed and identified according to the theory of curve matching. Focusing on the problems that the an- tenna pattern is difficult to reconnoitre, the micro similar scales are used to estimate the direction range of the main beam sketchily after the antenna pattern is rough determinated based on the foregoing reconnais- sance, and then the direction of main beam is searched and calculated by using the Hausdorff distance. Finally the accuracy of this method is illustrated by the simulation results.