基于聚焦变换解卷积的宽带稳健波束形成  

A Robust Focused-and-Deconvolved Conventional Beamforming for a Uniform Linear Array

作　　者：生雪莉 陆典 于洋 蔡晨阳 Xueli Sheng;Dian Lu;Yang Yu;Chenyang Cai(National Key Laboratory of Underwater Acoustic Technology,Harbin Engineering University,Harbin 150001,China;Key Laboratory for Polar Acoustics and Application of Ministry of Education(Harbin Engineering University),Ministry of Education,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]National Key Laboratory of Underwater Acoustic Technology,Harbin Engineering University,Harbin 150001,China [2]Key Laboratory for Polar Acoustics and Application of Ministry of Education(Harbin Engineering University),Ministry of Education,Harbin 150001,China [3]College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China

出　　处：《哈尔滨工程大学学报（英文版）》2024年第2期425-433,共9页Journal of Marine Science and Application

摘　　要：In the field of array signal processing,uniform linear arrays(ULAs)are widely used to detect/separate a weak target and estimate its direction of arrival from interference and noise.Conventional beamforming(CBF)is robust but restricted by a wide mainlobe and high sidelobe level.Covariance-matrix-inversed beamforming techniques,such as the minimum variance distortionless response and multiple signal classification,are sensitive to signal mismatch and data snapshots and exhibit high-resolution performance because of the narrow mainlobe and low sidelobe level.Therefore,compared with the wideband CBF,this study proposes a robust focused-and-deconvolved conventional beamforming(RFD-CBF),utilizing the Richardson–Lucy(R-L)iterative algorithm to deconvolve the focused conventional beam power of a half-wavelength spaced ULA.Then,the focused-and-deconvolved beam power achieves a narrower mainlobe and lower sidelobe level while retaining the robustness of wideband CBF.Moreover,compared with the wideband CBF,RFD-CBF can obtain a higher output signal-to-noise ratio(SNR).Finally,the performance of RFD-CBF is evaluated through numerical simulation and verified by sea trial data processing.

关 键 词：WIDEBAND BEAMFORMING Focusing transform DECONVOLUTION High resolution Robust 

分 类 号：TB56[交通运输工程—水声工程]