Introduction - If you have any usage issues, please Google them yourself
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.