机载双基雷达波束域杂波抑制方法  

Airborne bistatic radar beam domain clutter suppression method

作　　者：杨艺琼 吴建新 梁毅[2] YANG Yiqiong;WU Jianxin;LIANG Yi(School of Electronics and Communication Engineering,Sun Yat-sen University,Shenzhen 518107,China;National Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China)

机构地区：[1]中山大学电子与通信工程学院,广东深圳518107 [2]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2024年第6期1935-1945,共11页Systems Engineering and Electronics

基　　金：国家自然科学基金(61971326,62101603,62201623,62001468);广东省自然科学基金(2021A1515011979)资助课题。

摘　　要：阵元域杂波补偿和抑制算法在阵元数增加时运算量急剧增大,采用同时多波束接收的空域降维方案能够显著降低系统复杂度,但波束域的机载双基雷达杂波非平稳性给杂波抑制带来了很大的困难,且波束域的补偿方法目前没有相关研究。针对上述问题,本文提出了一种适用于波束域的机载双基雷达非平稳杂波抑制方法。通过构造一个距离空变插值矩阵,对不同距离门的回波数据做不同的插值处理,实现了波束域距离非平稳性补偿,针对补偿后的数据采用波束域空时自适应处理方法,在降低复杂度的同时实现了有效的杂波抑制。仿真实验验证了该方法的有效性和可行性。The calculation amount of clutter compensation and suppression algorithm in array element domain increases sharply when the number of array elements increases.The spatial-domain reduced-dimensional scheme of simultaneous multiple-beam reception can significantly reduce the complexity of the system,but the non-stationary property of airborne bistatic radar clutter in the beam domain brings great difficulties to clutter suppression,and there is currently no relevant research on the beam domain compensation method.To solve the above problems,this paper proposes a non-stationary clutter suppression method for airborne bistatic radar which is suitable for the beam domain.By constructing a range-dependent space-time interpolation matrix,the echo data of different range gates is interpolated differently,and the beam domain range-dependent compensation is realized.Then,the beam domain space-time adaptive processing(STAP)method is adopted for the compensated data,which achieves effective clutter suppression while reducing complexity.Simulation experiments verify the effectiveness and feasibility of this method.

关 键 词：机载双基雷达 波束域 杂波补偿 杂波抑制 

分 类 号：TN957.51[电子电信—信号与信息处理]