基于差频匹配场的深海声源定位方法  

Source Localization Method in the Deep Ocean Based on Frequency-Difference Matched Field

作　　者：胡佳华 甘维明[1,2] 季桂花 李光炬[1] 任云 HU Jiahua;GAN Weiming;JI Guihua;LI Guangju;REN Yun(Hainan Acoustics Laboratory,Institute of Acoustics,Chinese Academy of Sciences,Haikou,570105,China;University of Chinese Academy of Sciences,Beijing,100190,China;State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing,100190,China)

机构地区：[1]中国科学院声学研究所南海研究站,海口570105 [2]中国科学院大学,北京100190 [3]中国科学院声学研究所声场声信息实验室,北京100190

出　　处：《网络新媒体技术》2023年第6期51-59,共9页Network New Media Technology

基　　金：海南省重大科技计划项目(编号:ZDKJ2020010);中国科学院声学研究所自主部署项目(编号:MBDX202101)。

摘　　要：匹配场处理是水下目标定位的重要方法,其利用声场的空间结构匹配来反演声源位置,但传统匹配场处理(CMFP)对环境参数的失配非常敏感,容易产生误差。频率差匹配场处理(FDMFP)相比于CMFP具有更高的稳健性,但不适用于深海环境;仅相位匹配自积处理(POMAP)在FDMFP基础上改进后适用于深海环境,但POMAP的抗噪性较低。因此,本文在仅相位匹配自积处理(POMAP)方法的基础上,将带宽平均处理移动到匹配处理后的位置,提出了改进的仅相位匹配自积处理(IPOMAP)方法,以及将CMFP、POMAP、IPOMAP组合处理的方法(CPIP),该方法既有较好的抗噪性,又能在深海环境下保持差频匹配场处理方法的高稳健性。数值仿真和实验数据分析结果表明,CPIP在CMFP、POMAP、IPOMAP、CPIP中具有最优的定位性能,在40 km范围内具有最小的声源定位误差。这为失配环境和低信噪比时的深海声源定位方法的研究提供一种可行的思路。Matched field processing is an important method for underwater target localization.It uses the spatial structure matching of sound field to invert the location of sound source.However,conventional matched field processing(CMFP)is very sensitive to the mismatch of environmental parameters,which is easy to produce error.The frequency difference matched field processing(FDMFP)has higher robustness than CMFP,but the noise resistance of FDMFP is lower than that of CMFP,and it is not suitable for deep ocean.In this paper,on the basis of phase only matched autoproduct processing(POMAP)method,taking the bandwidth average processes to where after match processing,which proposes the improved phase only matched autoproduct processing(IPOMAP)method,as well as CMFP,POMAP,IPOMAP combined processing method(CPIP).It has the same noise resistance as CMFP and can maintain the high robustness of the frequency difference matched field processing in the deep ocean.The results of simulation and experimental data analysis show that CPIP has the best localization performance among CMFP,POMAP,IPOMAP and CPIP,and has the minimum location error of sound source within 40 km.This provides a feasible idea for the study of deep ocean sound source localization in mismatched environment and low SNR.

关 键 词：差频匹配场 深海定位 抗噪性 稳健性 仅相位匹配处理 

分 类 号：TB56[交通运输工程—水声工程]