一种水声瞬态信号的下降沿检测方法

游波; 蔡志明

doi:10.12263/DZXB.20210193

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一种水声瞬态信号的下降沿检测方法

学术论文 | 更新时间：2025-12-08

- 一种水声瞬态信号的下降沿检测方法
- A Falling Edge Detection Method of Underwater Transient Signals
- 电子学报 2022年50卷第9期页码：2215-2221
- 作者机构：
  
  1.武昌工学院电信与物联网工程系，湖北武汉 430065
  2.海军工程大学电子工程学院水声工程系，湖北武汉 430033
- 作者简介：
  
  [ "游波女， 1976年11月出生，江苏泰州人，博士，副教授，主要研究方向水声信号处理、数字图像处理." ]
- 基金信息：
  
  国家自然科学基金(6419014);湖北省教育厅科学技术研究计划指导性项目(B2018325);武昌工学院博士基金(2017BSJ01)
- DOI：10.12263/DZXB.20210193
  中图分类号： TB566
- 收稿：2021-02-01，
  
  修回：2021-05-27，
  
  纸质出版：2022-09-25
- 稿件说明：
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游波,蔡志明.一种水声瞬态信号的下降沿检测方法[J].电子学报,2022,50(09):2215-2221.

YOU Bo,CAI Zhi-ming.A Falling Edge Detection Method of Underwater Transient Signals[J].ACTA ELECTRONICA SINICA,2022,50(09):2215-2221.
游波,蔡志明.一种水声瞬态信号的下降沿检测方法[J].电子学报,2022,50(09):2215-2221. DOI： 10.12263/DZXB.20210193.

YOU Bo,CAI Zhi-ming.A Falling Edge Detection Method of Underwater Transient Signals[J].ACTA ELECTRONICA SINICA,2022,50(09):2215-2221. DOI： 10.12263/DZXB.20210193.

摘要

基于最大似然比准则，在高斯分布方差变化的假设下推导了水声瞬态信号累积和下降沿检测的检验统计量和非线性量的概率密度函数表达，重新利用FFT（Fast Fourier Transform）法分析了累积和性能模型，基于纽曼皮尔逊准则计算了在一定检测概率和虚警概率假设下方差和检测门限，并利用舰船转舵仿真信号、鱼雷出管仿真信号和水池重物落水实测脉动信号进行了检验.验证结果表明，相比常规方法，低信噪比下该方法对水声瞬态信号下降沿的判断精确度更高，稳健性更好.

Abstract

In this paper

based on the maximum likelihood ratio(MLR) criterion

the test statistics and the probability density function of non-linearity of the Page test are derived to detect the falling edge of underwater transient signals under the assumption of variance change of Gaussian distribution. The performance of the Page test is analyzed by FFT(Fast Fourier Transform) method again. The variance and detection threshold under certain detection probability and false alarm probability are calculated based on Newman Pearson criterion. The simulation signals of ship steering

torpedo ejecting and the measured signal of heavy falling obtained in the anechoic tank are exploited to verify the algorithm. The results show that

compared with the conventional method

this method has higher accuracy and better robustness in judging the falling edge of underwater transient signal at low SNR.

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Keywords

references

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