43t.m

来自「包含50个数字信号处理方面的matlab程序」· M 代码 · 共 9 行

wp1=0.4*pi;wp2=0.6*pi;ws1=0.3*pi;ws2=0.5*pi;Rp=0.5;Rs=50;
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=(hamming(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,-100,10])