fg_07_02.m

英文书《Digital Signal Processing with Examples in MATLAB》附带的MATLAB实例

% fg_07_02     Continuous and sampled.
rand('state',5);
N=200; T=2;
x=7*2*(rand(1,1000)-.5);
L=32; type=1; nu1=.15;
b=fir_weights(2*L+1,type,6,nu1);
y=filter(b,1,x);
y=y(1000-N+1:1000);
s=round(y(1:2:N));
sp_fig(1);
set(gcf,'position',[80,40,700,350]);
axes('position',[.1 .15 .8 .7]);
axis([0 N/T -7 7]);
set(gca,'fontsize',16,'ytick',[-7:7])
line([0:N-1]/T,y,'color','r'); grid on;
line([0:2:N-1]/T,s,'linestyle','none','marker','*','color','b');
xlabel('k'); ylabel('{x_k} and x(t)');
Title('{T}=2; Integer samples');