模拟低通滤波器的巴特沃思逼近、切比雪夫型逼近方法；从模拟低通到模拟高通、带通、带阻的频率变换法；从模拟滤波器到数字滤波器的脉冲响应不变法、双线性变换法的基本概念、基本理论和基本方法。
巴特沃思、切比雪夫模拟低通滤波器的设计方法；利用模拟域频率变换设计模拟高通、带通、带阻滤波器的方法。
利用脉冲响应不变法、双线性变换法设计数字滤波器的基本方法；能熟练设计巴特沃思、切比雪夫低通、带通、高通、带阻数字滤波器。
利用 MATLAB 直接进行各类数字滤波器的设计方法。(The basic concepts, theories and methods of Butterworth approximation and Chebyshev approximation of analog low-pass filter, frequency conversion from analog low-pass to analog high pass, band-pass and band stop, impulse response immutability from analog filter to digital filter and bilinear transformation.

Butterworth and Chebyshev design method of analog low-pass filter; design method of analog high pass, band-pass and band stop filter by using analog domain frequency conversion.

The basic method of designing digital filter by using impulse response invariant method and bilinear transformation method; be able to skillfully design Butterworth, Chebyshev low-pass, band-pass, high pass and band stop digital filter.

Matlab is used to design all kinds of digital filters directly.)