基于对角差信号的单脉冲雷达二维角估计新方法  

Two Dimension DOA Estimation Method of Monopulse Radar Based on Diagonal Difference Channel Signal

作　　者：戴幻尧 王建路 韩慧 张杨 乔会东 

机构地区：[1]电子信息系统复杂电磁环境效应国家重点实验室,河南洛阳471003

出　　处：《现代雷达》2017年第1期22-25,31,共5页Modern Radar

基　　金：国家自然科学基金资助项目(61301236);国家重点实验室主任基金资助项目(cemee 2017z010B)

摘　　要：传统单脉冲雷达具有方位、俯仰二维角度的测量能力,其角度分辨率取决于天线波束宽度,对主波束宽度内的双/多目标不具备分辨能力。为了提高传统单脉冲雷达测角分辨能力,提出一种新的单脉冲雷达系统结构,巧妙地提取和利用了雷达对角线差通道的接收信号,通过建立新的雷达观测方程,提出了四通道单脉冲联合测角新方法,一次脉冲测量即可同时获得两个目标的角度信息,推导了二维单脉冲角估计的解析表达式。新方法计算量少,工程易实现,可使单脉冲雷达的角度分辨率至少达到波束宽度的三分之一,显著提高了单脉冲雷达的角度分辨能力。在不同信噪比和两目标回波功率比条件下,对新方法进行了仿真分析,验证了方法的有效性。The traditional monopulse radar has the ability to measure the azimuth and elevation two-dimensional angle of target, the angle resolution depends on the antenna beam width, it does not have the ability to distinguish dual / multiple target located in the main beam. In order to improve the traditional monopulse radar angle resolution, put forward a new monopulse radar system structure, the radar signal in diagonal difference channel is extracted and used. By establishing a new radar observation equation, four channel combined monopulse angle measurement method is given. One pulse measurement can obtain two target angle information. The analytical expressions for monopulse angle estimation is derived. The new method has significant benefit with less calculation and easy to be realized. The radar angle resolution comes to at least 1/3 beam width. In different SNR ratio and two target echo power ratio, the effectiveness of the method is verified by simulation analysis.

关 键 词：单脉冲雷达 对角差信号 角度分辨率 

分 类 号：TN958[电子电信—信号与信息处理]