47t.m

包含50个数字信号处理方面的matlab程序

wp1=0.35*pi;wp2=0.65*pi;ws1=0.2*pi;ws2=0.8*pi;Rp=1;Rs=60;
N=70;n=[0:1:N-1];
wc1=(wp1+ws1)/2;wc2=(wp2+ws2)/2;
hd=ideal_lp(wc2,N)-ideal_lp(wc1,N);
w_han=(blackman(N))';
h=hd.*w_han;
[db,mag,pha,grd,w]=freqz_m(h,1);
subplot(211);stem(n,h,'.');xlabel('n');ylabel('h(n)');
subplot(212);plot(w/pi,db);xlabel('w/pi');ylabel('pha');axis([0,1,-150,10])