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.
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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第7期233-238,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:11174312
10974218
11125420)
中国科学院百人计划基金资助的课题~~
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
waveguide invariant
warping transform
passive source range estimation
autocorrelation function
