exa5_22.m

matlab应用实例。如：FIR、IIR数字滤波器设计等。

%--------------------------------------------------------------------------
% exa060605_remez.m,   for example 6.6.5;
% to test remez and to design bandpass FIR filter;
%-------------------------------------------------------------------------

f = [0 0.3 0.4 0.6 0.7 1]; 
a = [0 0 1 1 0 0];
b = remez(17,f,a);
[h,w] = freqz(b,1,512);
plot(f,a,'k-',w/pi,abs(h),'k.')
legend( '理想滤波器','实际滤波器')