一种基于MVDR-MMP的水面干扰抑制方法

南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (7): 50–.

一种基于MVDR-MMP的水面干扰抑制方法

付留芳1,2*，赵国君3，章新华1，窦平轩2，李鹏1

出版日期:2015-12-21 发布日期:2015-12-21
作者简介:(1. 海军大连舰艇学院大连 116013,2 中国人民解放军92337部队大连 116001,3中国人民解放军91913部队大连 116041)
基金资助:
收稿日期:2015-06-30
*通讯联系人,E-mail:fuliufanghenan@126.com

A method to suppress surface interference based on MVDR-MMP

Fu Liufang1,2*, Zhao Guojun3, Zhang Xinhua1, Dou Pingxuan2, Li Peng1

Online:2015-12-21 Published:2015-12-21
About author: (1. Department of military oceanography, Dalian Naval Academy, Dalian, 116013, China; 2. Unit NO. 92337 of PLA, 116087,Dalian, China; 3. Unit NO. 91913 of PLA, 116041,Dalian, China)

摘要/Abstract

摘要： 在水面离散强干扰下检测和定位水下安静目标是浅海匹配处理中的一个重要问题.根据简正波理论,声场是所有传播模态的叠加,而这些模态是深度的函数.理论上,浅海常见的负梯度声速剖面下,水面声源和水下声源激发的简正波模态具有明显差异性.基于模匹配处理方法,通过对声源激发简正波模态的筛选,对水面干扰进行抑制.仿真表明:匹配模处理能够有效进行干扰和目标的定位,而常规低阶匹配模处理能够在较低精度下抑制水面干扰,而对角加载的MVDR匹配模处理能够在此基础上有效抑制旁瓣,提高定位精度.

Abstract: Detecting and localizing submerged target in the presence of loud interfering surface ships is an important problem for matched field processing in shallow water. According to normal mode theory, the complete acoustic field is constructed by summing up contributions of each of the modes weighted in accordance to the source depths. It has been proved that the mode orders motivated by surface and submerged sources are very different with negative sound velocity profile. The purpose of this work is to suppress the surface interference by selecting modes based on matched mode processing (MMP). The simulation illustrates that MMP can localize the submerged target and surface interference, and surface interference can be suppressed using conventional MMP (CMMP) by some low order modes with low precision. Furthermore, diagonal loading minimum variance distortionless response (DL-MVDR) MMP can suppress the sidelobe, and improve the localization precision compared to CMMP.

付留芳1,2*，赵国君3，章新华1，窦平轩2，李鹏1. 一种基于MVDR-MMP的水面干扰抑制方法[J]. 南京大学学报(自然科学版), 2015, 51(7): 50–.

Fu Liufang1,2*, Zhao Guojun3, Zhang Xinhua1, Dou Pingxuan2, Li Peng1. A method to suppress surface interference based on MVDR-MMP[J]. Journal of Nanjing University(Natural Sciences), 2015, 51(7): 50–.

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