信号处理中各种频率以及小波尺度的关系

Relations among the Different Frequencies and Wavelet Scale in Signal Processing

在信号处理和计算机仿真中,明确模拟频率、数字频率及归一化频率等各种频率之间的关系是十分重要的。在小波分析中,小波尺度与实际频率的关系也常常困扰学习者,使得他们在滤波器设计和小波分析等方面遇到困难。为此,笔者就各种频率的相互关系进行讨论,并介绍其Matlab实现。

To distinguish the differences among analog frequency, digital frequency and normalization frequency is very important in signal processing and computer simulation. The mapping between wavelet scale and real frequency is a troublesome problem too. The relationship and correlations among different frequencies are discussed in this article, and Matlab example is used to explain the implementation of frequency transformation.