一种用于深水多波束测深系统的改进MVDR成像算法  

An improved MVDR imaging method applied in deep-water multibeam echosounder

作　　者：谭儒 刘晓东[1,3,4] 王舒文 TAN Ru;LIU Xiaodong;WANG Shuwen(Laboratory of Ocean Acoustics Technology,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;Beijing Engineering Technology Research Center of Ocean Acoustic Equipment,Beijing 100190,China)

机构地区：[1]中国科学院声学研究所海洋声学技术实验室,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院声学研究所声场声信息国家重点实验室,北京100190 [4]北京市海洋声学装备工程技术研究中心,北京100190

出　　处：《海洋测绘》2022年第5期19-22,31,共5页Hydrographic Surveying and Charting

基　　金：中国科学院先导科技专项经费项目(XDA22040602)。

摘　　要：近年来多波束水体数据的研究开始受到重视。受波束宽度与旁瓣的影响,利用常规波束形成方法水下成像效果欠佳。高分辨率波束形成方法虽然效果良好,但在实际应用中面临计算量巨大的缺陷。为此,基于深水多波束声纳分扇区发射的特点对MVDR算法进行了改进。改进方法采用常规波束形成与MVDR波束形成相结合的方式,降低了对MVDR中的滤波器长度的要求,因而大大减少了计算量。实验结果显示,改进方法与MVDR算法成像效果相当。该方法在多波束声纳分扇区发射的条件下,具有明显的计算优势。In recent years,the research of multibeam water column data has attracted more and more attention.Due to the influence of beam width and sidelobe,the result of underwater imaging with conventional beamforming is not good.Although the high-resolution beamforming methods have good effect,they suffer from the defect of huge amount of calculation in practical application.Therefore,based on the characteristic of deep-water multibeam sonar emitting beams in different sectors,this paper improves the MVDR algorithm.The improved method adopts the combination of conventional beamforming and MVDR beamforming,which reduces the requirement of filter length in MVDR,so the amount of calculation is greatly reduced.The result of experiment provided by this paper shows that the improved method can almost achieve the same result as MVDR algorithm in imaging.In the condition of multibeam sonar emitting beams in different sectors,the method presented in this paper has obvious advantage in calculation.

关 键 词：多波束测深系统 水柱成像 线性阵列 波束形成 最小方差无畸变响应 

分 类 号：P229.3[天文地球—大地测量学与测量工程]