%0 Journal Article
%T 阵列雷达双零点单脉冲低角跟踪算法
%A 徐振海
%A 熊子源
%A 宋聃
%A 肖顺平&lt
%A /br&gt
%A XU Zhenhai
%A XIONG Ziyuan
%A SONG Dan
%A XIAO Shunping
%J 国防科技大学学报
%D 2015
%R 10.11887/j.cn.201501022
%X 针对阵列雷达体制，从改进单脉冲的角度出发研究了低角跟踪问题。在多径阵列信号模型的基础上，利用极大似然估计原理推导了双零点单脉冲测角算法，通过数字波束形成实现双零点单脉冲系统修正和、差方向图。仿真分析了双零点单脉冲测角性能，得出测角性能与信噪比、目标仰角以及复反射系数的关系。用实测数据对该算法进行验证，结果表明：当目标仰角小于1/4波束宽度时，测角均方根误差达到1/40波束宽度，可以有效解决低角跟踪问题。</br>According to array radar system, low-angle tracking problem was investigated from the perspective of revised mono-pulse. Firstly, based on the array signal model under multi-path conditions, the double-null mono-pulse algorithm was deduced by using the principle of Maximal Likelihood (ML) estimation. The revised sum-difference patterns were designed by digital beamforming (DBF). Simulation result shows the relation of double-null mono-pulse performance, SNR, target elevation, and complex reflection coefficient. Finally, measured data is used for validation. Result shows that the root of mean square error (RMSE) is still less than 1/40 of the beamwidth when the target elevation is less than 1/4 of the beamwidth. Therefore, the double-null mono-pulse algorithm is effective for low-angle tracking problem.
%K 阵列雷达 低角跟踪 多径 双零点 单脉冲 复反射系数 数字波束形成&lt
%K /br&gt
%K array radar low-angle tracking multi-path double-null mono-pulse complex reflection coefficient digital beamforming
%U http://journal.nudt.edu.cn/gfkjdxxb/ch/reader/view_abstract.aspx?file_no=201501022&flag=1