说明：  简单的数字滤波器设计 1．用脉冲响应不变法设计巴特沃斯数字滤波器 2. 用双线性变换法设计切比雪夫数字滤波器 3. 用双线性变换法设计巴特沃斯数字滤波器，并将直接型结构转换成级联型结构 5.设计带阻滤波器 6．利用窗函数设计法设计FIR数字低通滤波器 7. 利用频率采样设计法设计FIR数字低通滤波器。 8. 创新训练拓展内容 （1）根据心电信号特点设计IIR或FIR滤波器滤除心电图信号噪声 （2）设计IIR滤波器或FIR滤波器对语音信号进行滤波。
(Simple digital filter design 1. design of Butterworth digital filter by impulse response invariance 2. design of Chebyshev digital filter by bilinear transform 3. the Butterworth digital filter is designed by the bilinear transformation method, and the direct structure is converted into a cascade structure 5. design bandstop filter 6. design of FIR digital low pass filter by window function design 7. the FIR digital low pass filter is designed by using the frequency sampling design method. 8. the content of creative training and expansion (1) design IIR or FIR filter to filter the noise of electrocardiogram signal according to the characteristics of ECG signal (2) the IIR filter or FIR filter is designed to filter the speech signal.)