机载前视阵雷达阵元误差稳健的空时插值补偿方法  

Forward-looking airborne radar antenna error robust space-time interpolation compensation method

作　　者：刘锦辉[1] 廖桂生[2] 王泉[1] 

机构地区：[1]西安电子科技大学计算机外部设备研究所,陕西西安710071 [2]西安电子科技大学雷达信号处理重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2014年第12期2388-2392,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(61303034);基本科研业务费(K5051303011)资助课题

摘　　要：空时插值方法通过对地面杂波空时导向矢量进行插值变换,能够有效地降低机载前视阵雷达地面杂波的距离依赖性,改善空时自适应处理器的杂波抑制性能。然而,当机载雷达接收通道存在阵元误差时,该方法对接收的数据处理失效。针对该问题,提出一种稳健的空时插值方法,该方法在杂波空时导向矢量周围选取约束导向矢量,然后进行插值变换,补偿地杂波距离依赖性。仿真结果表明,当机载雷达接收通道存在阵元误差时,该方法能够有效地降低接收的地杂波数据的距离依赖性,提高空时自适应处理器的杂波抑制性能。Space-time interpolation method implements interpolation transformation on the space-time stee-ring vectors of the clutter.It can effectively mitigate the range-dependence problem of the forward-looking air-borne radar clutter and improve the clutter rej ection performance of the space-time adaptive processing （STAP）. However,it annuls to process the received clutter data when the antenna element error exists.Aiming at this problem,a robust space-time interpolation method is proposed.The proposed method selects calibration stee-ring vectors around the space-time steering vector of the ground clutter,then implements the interpolation transformation,and compensates the clutter with the range-dependence problem.The simulation results show that the proposed method can effectively mitigate the range-dependence problem existing in the clutter and im-prove the clutter rej ection performance of STAP when the antenna elements error exists in the receiving channel in forward-looking airborne radar.

关 键 词：阵元误差 空时插值 距离依赖性 空时自适应处理 SPACE-TIME adaptive PROCESSING (STAP) 

分 类 号：TN959.73[电子电信—信号与信息处理]