舰船电子工程2019，Vol.39Issue(3)：147-151,5.DOI:10.3969/j.issn.1672-9730.2019.03.034
基于主模式抑制的主动稳健自适应波束形成方法
A Robust Adaptive Beamforming Method for Active Sonar Based on Dominant Mode Rejection
摘要
Abstract
Due to the short duration of active signal in complex multivariate acoustic channel,the performance of adaptive beamforming on active sonar is deteriorated. A robust adaptive beamforming method based on dominant mode rejection(ST-DMR) is proposed by utilizing the space-time characteristic on acoustic field. Firstly,in this method,the covariance matrix is pre-guided by the broadband frequency coherence on active signal,and the convergence speed is improved. Then,with covariance matrix eigen decomposition,its dominant mode subspace and eigen-value is obtained. Lastly,a protection factor is used to angle mismatch pro?tect,and then the weight vector is modified to achieve the adaptive beamforming process. Simulation and experimental data analysis show that ST-DMR method achieves high resolution and low sidelobe level,convergence quickly,process robust and mismatch protect.关键词
主模式抑制/特征空间/导向协方差矩阵/失配保护Key words
dominant mode rejection/feature space/steered covariance matrix/mismatch protect分类
通用工业技术引用本文复制引用
孟华,曹占启,蔡旭东..基于主模式抑制的主动稳健自适应波束形成方法[J].舰船电子工程,2019,39(3):147-151,5.
