包含有信号源的数字滤波器设计，文件中包含有高通，低通，带通，带阻四种数字滤波器。-The program is used to design a digital filter.There are four kinds of digital filter included in the file.

Chebyshew-1型带通模拟滤波器，可以较好的实现边界滤波-Chebyshew-1,band pass filter,used for signal processing