齐栋,
刘成城,
赵拥军
解放军战略支援部队信息工程大学数据与目标工程学院 ??郑州 ??450001
基金项目:国家自然科学基金(61703433)
详细信息
作者简介:唐敏：女，1994年生，博士生，研究方向为阵列信号处理和波束形成技术
齐栋：男，1993年生，硕士生，研究方向为阵列信号处理和DOA估计
刘成城：男，1986 年生，讲师，研究方向为数字波束形成技术
赵拥军：男，1964年生，教授，博士生导师，研究方向为雷达信号处理、阵列信号处理
通讯作者:唐敏 tangminmvp@126.com
中图分类号:TN911.7计量
文章访问数:1157
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被引次数:0
出版历程
收稿日期:2018-04-11
修回日期:2019-05-16
网络出版日期:2019-05-25
刊出日期:2019-07-01
New Adaptive Beamformer for Coherent Interference Based on Multistage Blocking
Min TANG,,Dong QI,
Chengcheng LIU,
Yongjun ZHAO
School of Data and Target Engineering, PLA Strategic Support Force Information Engineering University, Zhengzhou 450001, China
Funds:The National Natural Science Foundation of China (61703433)
摘要
摘要:针对期望信号波达角(DOA)估计误差较大时相干波束形成性能下降的问题，该文提出一种基于多级阻塞的稳健相干自适应波束形成算法。该算法首先定义阻塞矩阵，推导多级阻塞原理，并利用其滤除阵列接收信号中的期望信号；然后给出空间中只存在期望信号时，子阵与全阵间阵列流型的映射关系，据此推导全阵扩展变换，并证明其在干扰信号存在条件下的有效性；最终利用扩展变换获取全阵最优权矢量，实现相干波束形成。该算法对期望信号波达角估计误差稳健，且无需干扰信号来向的先验信息，同时可以有效避免阵列孔径的损失。仿真分析验证了算法的优越性和理论分析的有效性。
关键词:信号处理/
稳健波束/
相干干扰/
波达角估计误差/
多级阻塞
Abstract:Since the performance of adaptive beamforming algorithm for coherent signals degrades when the estimation error in the Direction Of Arrival (DOA) of the desired signal is large, a new multistage blocking based beamforming algorithm for coherent interference suppression is proposed. Firstly, the blocking matrix is constructed and the principle of multistage blocking is derived, with which the received signal is processed to remove the desired signal component. Then the mapping between the array manifold of sub-aperture array and the full-aperture array is analyzed when only the desired signal exists in the space. On this basis, the extension transformation is derived with its effectiveness proved in the presence of interference signals. At last, the optimal weight vector of the adaptive beamformer for coherent interference is obtained by extension transformation. Requiring no prior information of the DOA of the interference signals, the new method is robust to the DOA estimation error, and can avoid the loss of array aperture. The effectiveness and superiority of the new algorithm are verified by simulation analysis.
Key words:Signal processing/
Robust beamforming/
Coherent interference/
Direction Of Arrival (DOA) estimation error/
Multistage blocking
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