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%设计数字巴特沃斯带通滤波器,%通带0.25pi rad<w<0.45pi%通带最大衰减为3dB,阻带最小衰减为40dB%阻带范围0<w<0.15pi,0.55pi<w<piclc;clear all;close all;wp=[0.25,0.45];ws=[0.15,0.55];rp=3;rs=40;[N,wc]=buttord(wp,ws,rp,rs);[B,A]=butter(N,wc);//这里的N是最低阶数,我想将N改变一下就可以了吧plot(linspace(0,pi,1024),20*log10(abs(freqz(B,A,1024))))grid on;xlabel('\ome |
