CAJ | 학술논문

信号的突变性或奇异性经常携带有比较重要的信息，它是信号重要的特征之一。本文介绍了小波变换的基本概念，讨论了小波变换的奇异性检测方法，可以应用于海洋声波信号的奇异性检测。阐述了高斯和Daubechies小波函数的信号奇异性检测原理及其MATLAB仿真实现，分析了信号奇异点的定位方法和小波检测效果，并指出了利用此方法时对所用小波函数的要求及小波尺度的选取对检测结果的影响，为非平稳信号的奇异性检测的研究提供了一种行之有效的方法。
신호적돌변성혹기이성경상휴대유비교중요적신식，타시신호중요적특정지일。본문개소료소파변환적기본개념，토론료소파변환적기이성검측방법，가이응용우해양성파신호적기이성검측。천술료고사화Daubechies소파함수적신호기이성검측원리급기MATLAB방진실현，분석료신호기이점적정위방법화소파검측효과，병지출료이용차방법시대소용소파함수적요구급소파척도적선취대검측결과적영향，위비평은신호적기이성검측적연구제공료일충행지유효적방법。
Mutations or singularity in signals often carry important information, they are important features of the signals. This paper introduces the basic concepts of wavelet transform, discusses the singularity detection method of wavelet transform, this method can be applied to the analysing and processing of the acoustic signals from the sea. This paper later discusses the signal singularity detection principle and the MATLAB simulation used by the gaussian and Daubechies wavelet function,analyzes the positioning method of signal singularity and wavelet detection effect, and points out the requirement of the wavelet function and the influence of the selection of wavelet scale on test results. It provides an effective method for the research of non-stationary signal singularity detection.