一种基于大孔径水平阵的浅海声源被动测距方法  

A Passive Ranging Method for Shallow Water Sound Sources Based on Large Aperture Horizontal Array

作　　者：陈亚伟 邢孟道[1,2] 王俊[1] 杨予昊[3,4] CHEN Yawei;XING Mengdao;WANG Jun;YANG Yuhao(National Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China;Collaborative Innovation Center of Information Sensing and Understanding,Xidian University,Xi’an 710071,China;Nanjing Research Institute of Electronics Technology,Nanjing 210039,China;Key Laboratory of IntelliSense Technology,CETC,Nanjing 210039,China)

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071 [2]西安电子科技大学信息感知技术协同创新中心,西安710071 [3]南京电子技术研究所,南京210039 [4]中国电子科技集团公司智能感知技术重点实验室,南京210039

出　　处：《电子与信息学报》2022年第12期4125-4133,共9页Journal of Electronics & Information Technology

摘　　要：面向浅海水下声源的被动测距需求,该文提出一种基于大孔径水平阵的简正波分离与测距方法。该方法针对频率波数域模态曲线弯曲导致的同阶简正波分离处理复杂的问题,在各阶简正波截止频率不随信号频率变化的条件下,提出基于波数伸缩的简正波模态对齐方法,实现不同阶简正波的有效分离。通过非线性相位补偿实现多阶简正波的能量聚焦,结合距离遍历、峰值提取实现声源距离的被动估计。该方法可获得空域、频域增益,实现多模态能量的累积,为微弱声源目标的距离估计提供了新的技术途径。最后,结合仿真数据验证了方法的有效性。In order to meet the demand for passive ranging of sound sources in shallow water,a normal mode separation and ranging method based on a large-aperture horizontal array is proposed.This method deals with the problem of modal separation that caused by the bending of the modal curve in the frequency-wavenumber domain.Under the condition that the cut-off frequency of each order normal mode does not change with the signal frequency,a alignment method based on wavenumber scaling is presented to realize the effective separation of normal modes.The energy focusing of normal modes is realized by nonlinear phase compensation,and the passive ranging of the sound source is realized by combining distance traversal and peak extraction.This method can effectively achieve gains in space and frequency domains,and obtain multi-modal energy accumulation,which provides a new approach for the distance estimation of weak sound sources.The effectiveness of the method is verified by simulation data.

关 键 词：大孔径阵列 被动测距 波数伸缩 简正波分离 

分 类 号：TN929.3[电子电信—通信与信息系统]