example9_2.asv

原名：数字信号处理基础及MATLAB实现,解压缩密码：[e-mail]

%例9-2;example9_2
n0=0;n1=0;n2=59;
Hd=stepseq(n0,n1,n2);
[h,w]=freqz(Hd,1);
hl=dft(Hd,60);
subplot(2,2,1);stem(Hl);title('Hd')
%subplot(2,2,2);plot(w/pi,20*log(abs(h)/abs(h(1))));title('H(W)')
grid