Radiated noise sources near-field location based on MVDR focused beamforming

Both broadband signal and narrowband signal can fully describe the spatial distribution of the radiated noise sources.The near-field focused beamforming method based on minimum variance distortionless response(MVDR) was proposed,which may be used in underwater radiated noise source locating,meantime,the MVDR-based bearing estimation was fused with focused beamforming.Compared with conventional methods,the proposed method has higher resolution and lower side-lobe level,while the impact of the aliasing was reduced.Both simulations and experiments verify the validity and efficiency of the proposed method.