fg_05_02.m

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

% fg_05_02  Ideal filter weights
M=500;
H=[zeros(1,.4*M),ones(1,.2*M),zeros(1,.4*M)];
Hsh=fftshift(H);
hsh=ifft(Hsh);
h=ifftshift(hsh);
sp_fig(1);
axis([-M/2 M/2 -.05 .21]);
set(gca,'fontname','times','fontsize',14);
set(gca,'position',[.12 .15 .9-.12 .9-.15]);
line([-M/2:M/2-1],real(h),'color','k','marker','.');
grid;
xlabel('Index {k}'); ylabel('Weight  {h_k}');