gusucode.com > matlab编程一个频分复用系统的模拟源码程序 > matlab编程一个频分复用系统的模拟源码程序/code/DSP_test/text_butt.m
%巴特沃斯滤波器测试 fp=3000;fs=3500; rp=3;rs=30; wp=2*fp/Fs;ws=2*fs/Fs; [N Wn]=buttord(wp,ws,rp,rs); [b1 a1]=butter(N,Wn); [h1 fw]=freqz(b1,a1,256); fw=fw./pi; plot(fw,abs(h1));