Page 80 - 应用声学2019年第4期

第 38 卷 第 4 期 Vol. 38, No. 4
2019 年 7 月 Journal of Applied Acoustics July, 2019

⋄ 李启虎院士八十华诞学术论文 ⋄

一种低复杂度的稳健自适应波束形成

毛卫宁 1,2† 钱 进 1

(1 东南大学信息科学与工程学院 南京 210096)
(2 东南大学网络空间安全学院 南京 210096)

摘要 针对目前多数稳健自适应波束形成方法计算复杂度高，在高信噪比时性能下降的问题，研究提出了一
种低复杂度的稳健自适应波束形成方法，通过干扰区域空间谱积分重构干扰协方差矩阵，利用信号子空间的
投影估计期望信号导向向量，降低计算量，提高稳健性。仿真实验表明，该算法能获得近似最优的输出信干噪
比和更好的稳健性。
关键词 方位估计，稳健自适应波束形成，协方差矩阵重构
中图法分类号: TN911.7 文献标识码: A 文章编号: 1000-310X(2019)04-0540-05
DOI: 10.11684/j.issn.1000-310X.2019.04.010

A low-complexity robust adaptive beamformer

MAO Weining 1,2 QIAN Jin 1

(1 School of Information Science and Engineering, Southeast University, Nanjing 210096, China)

(2 School of Cyber Science and Engineering, Southeast University, Nanjing 210096, China)

Abstract At present, most of robust adaptive beamformers tend to have two problems—One is the higher
computational complexity and the other is the cancellation of the desired signal at high SNR. In this paper, a
low-complexity robust adaptive beamformer with good robustness is proposed which reconstructs interference
covariance matrix using the spatial spectrum integrated in the region of interference and estimates the steering
vector of the desired signal using the projection of signal subspace. Simulation results demonstrate that the
performance of the proposed method is almost always close to the optimal value.
Key words Direction of arrival, Robust adaptive beamforming, Covariance matrix reconstruction

2019-02-13 收稿; 2019-04-05 定稿
作者简介: 毛卫宁 (1963- ), 女, 湖南湘潭人, 教授, 研究方向: 水声信号处理。
† 通讯作者 E-mail: maoweining@seu.edu.cn