untitled3yyyyy.m

matla窗口制作

n=100;
f=[0 0.4 1];
amp=[0 1];
up=[0.002 1.002];
lo=[-0.002 0.009];
b=fircls(N,f,amp,up,lo);
[h,w]=freqz(b);
plot(w/pi,abs(h));
grid on