基于波束置零的稳健低空目标角度估计方法  

Robust Low-Elevation Target Angle Estimation Method Based on Beam Nulling

作　　者：顾晓婕[1] 李春阳 曹运合[2] 王蒙 GU Xiaojie;LI Chunyang;CAO Yunhe;WANG Meng(No. 38 Research Institute of CETC, Hefei 230088;Xidian Univercity, Xi'an 710071;Beijing Research Institute of Mechanical & Electrical Technology, Beijing 100074)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088 [2]西安电子科技大学,西安710071 [3]北京机电工程研究所,北京100074

出　　处：《火控雷达技术》2021年第2期9-12,共4页Fire Control Radar Technology

基　　金：国家自然科学基金(61771367)。

摘　　要：针对复杂阵地下低空目标的仰角估计问题,建立多径信号服从高斯分布的分布源信号模型,提出一种基于波束形成的角度估计方法。该方法在直达波入射角方向形成窄零陷,而在反射波的入射角方向形成具有一定宽度的零陷,然后对回波信号进行空域滤波,输出能量最小时对应的角度就是目标仰角的估计值。与现有的方法相比,该方法在复杂阵地条件下能有效地进行目标仰角估计。计算机仿真结果验证了该方法的可行性。To solve the elevation angle estimation problem of low-altitude targets in complex environment,a distributed source signal model with multipath signals obeying Gaussian distribution principal was established,and an angle estimation method based on beamforming was also proposed.The method formed a narrow nulling in the incident angle of the direct wave,and formed a nulling with a certain width in the incident angle direction of the reflected wave;and then performed spatial filtering on the echo signal.When the output energy came at minimum,the corresponding angle would be the estimation of the target elevation angle value.Compared with existing methods,the proposed method can effectively perform target elevation estimation under complex battlefield conditions.The computer simulation results verified the feasibility of the method.

关 键 词：低空目标 多径效应 波束形成 测角 

分 类 号：TN953[电子电信—信号与信息处理]