摘要
通过分析和计算几种小波对不同奇异性信号的变换过程,验证了小波变换方法在判定信号奇异性中的作用.比较了几种小波变换的效果,提出了对阶跃、三角波等信号进行奇异性检测时小波的基本选取规则.
The singularity of signal is an important character of signal. Form the singularity, the interrupted point or discontinuous point can be gained. The wavelet transformation is an effective tool in the singularity detection. By using different wavelet transformation, the effect of wavelet transformation is validated in finding singularity＇s location. Based on the compare of the results and the Lip index, the rule of wavelet selection in step or triangular signal detection is proposed.
出处
《陕西科技大学学报（自然科学版）》
2007年第3期73-76,共4页
Journal of Shaanxi University of Science & Technology
关键词
小波变换
奇异点检测
李氏指数
wavelet transformation
singularity detection
Lip index
