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一种基于β-warping变换算子的被动声源距离估计方法
引用本文:戚聿波,周士弘,张仁和,任云.一种基于β-warping变换算子的被动声源距离估计方法[J].物理学报,2015,64(7):74301-074301.
作者姓名:戚聿波  周士弘  张仁和  任云
作者单位:1. 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;2. 中国科学院大学物理学院, 北京 100049
基金项目:国家自然科学基金(批准号: 11174312, 10974218, 11125420)和中国科学院百人计划基金资助的课题.
摘    要:基于浅海简正波水平波数差与波导不变量之间的关系, 本文提出了一种适用于水平不变浅海声波导中接收信号自相关函数的频域卷绕变换算子. 该算子可以将接收信号自相关函数中的简正波互相关成分变换为时域上可分离的脉冲序列, 且脉冲序列的相对延迟时间包含声源距离信息. 利用已知距离的引导声源, 由单水听器记录的脉冲信号即可实现被动声源距离估计. 对仿真和实验获得的脉冲信号数据处理结果验证了该变换算子用于被动声源距离估计的有效性.

关 键 词:波导不变量  卷绕变换  声源距离被动估计  自相关函数
收稿时间:2014-07-06

A passive source ranging method using the waveguide-invariant-warping operator
Qi Yu-Bo,Zhou Shi-Hong,Zhang Ren-He,Ren Yun.A passive source ranging method using the waveguide-invariant-warping operator[J].Acta Physica Sinica,2015,64(7):74301-074301.
Authors:Qi Yu-Bo  Zhou Shi-Hong  Zhang Ren-He  Ren Yun
Affiliation:1. State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;2. College of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:Based on the relationship between the horizontal wavenumber difference of two modes and the waveguide invariant in a range-independent shallow water waveguide, a frequency-warping operator is proposed for the autocorrelation function of the received signal. This operator can transform the cross-correlation functions of two different modes in the signal autocorrelation function into separable impulsive sequences. With a guide source providing the dispersive characteristics of the waveguide, the source range can be extracted from the relative delay time of the impulsive sequence using a single hydrophone. The availability of the waveguide-invariant-warping operator in the passive source range estimation is verified by simulated and experimental data.
Keywords:waveguide invariant  warping transform  passive source range estimation  autocorrelation function
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