基于矩阵空域预滤波的近场聚焦波束形成  

Near field focused beamforming based on matrix spatial prefiltering approach

作　　者：刘凯[1] 梁国龙 

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]哈尔滨工程大学水声技术国家级重点实验室,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2014年第1期58-61,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51009042)

摘　　要：为解决因为强辐射噪声源(判为干扰)的存在影响对弱辐射噪声源(判为目标)的检测和参数提取,甚至得不到弱辐射噪声源声图的问题,提出了一种基于矩阵空域预滤波处理的近场聚焦波束形成方法.通过设计一个空域的矩阵滤波器对水听器阵列数据进行矩阵处理,抑制指定范围内的强干扰信号,且尽量保证其他感兴趣范围内的信号无畸变通过.通过水面舰船辐射噪声声图测量的具体实例来说明该方法对系统性能的改善效果,仿真结果表明:该方法提高了对弱辐射噪声源的探测和定位能力,优化了聚焦波束扫描声图质量.A novel approach to near field focused beamforming based on matrix spatial prefiltering was proposed to receive acoustic image of weak source （considered as target）,when strong source （consid-ered as jam）existed.Specifically,a matrix filter was designed to spatially filter the data snapshots of acoustic hydrophone.The unwanted components within the specified area were attenuated and the de-sired components in the area of interest passed with minimal distortion.Example of acoustic image measurement for ship radiation noise was presented to illustrate the performance of this new ap-proach.Simulation results show that the proposed approach can improve the ability of detection and location to weak targets and the quality of the focused beamforming acoustic image.

关 键 词：声图 聚焦波束形成 矩阵空域预滤波 干扰 目标 

分 类 号：TB566[交通运输工程—水声工程]