抑制快速运动强干扰的稳健自适应波束形成方法  

A robust adaptive beamforming algorithm for suppressing fast-moving strong interferers

作　　者：冯杰[1] 孙超[1] 唐建生[1] 

机构地区：[1]西北工业大学声学工程研究所,西安710072

出　　处：《信号处理》2007年第1期93-96,共4页Journal of Signal Processing

基　　金：水声技术国防科技重点实验室基金(51445020103HK0301)

摘　　要：针对存在快速运动强干扰时自适应波束形成性能的严重降低,提出了一种稳健的自适应波束形成方法。该方法使用零陷展宽技术修改采样协方差矩阵,使其自动地在干扰方位形成展宽的零陷以抑制运动强干扰,同时采用对角加载技术,以增强此方法对系统误差的稳健性,加载量通过约束扫描向量的误差来确定。仿真结果表明该方法能有效地提高当存在快速运动的强干扰时自适应波束形成的性能。Adaptive beamform/ng methods are known to degrade in the presence of fast-moving strong interferers. In order to alleviate the performance degradation, a robust adaptive beamforming algorithm is presented in this paper. Null-broadening technique is used to broaden nulls in the direction of interferers, and at the same time, diagonal loading is used to enhance its robustness. The amount of diagonal loading can be precisely calculated based on the uncertainty set of the steering vector. The simulation results show that the proposed algorithm can not only effectively suppress fast-moving strong interferers, but also is robust to system errors

关 键 词：运动强干扰 自适应波束形成 展宽零陷 稳健 

分 类 号：TN911.7[电子电信—通信与信息系统]