fftdemo12.m

% The reference signal
yref =  [ones(1,56),zeros(1,200)];

% Initialize movie
v = VideoWriter('test.avi','Uncompressed AVI');
v.FrameRate = 10;
open(v)
figure('Position',[100 100 850 600])
MF(1) = sum(yN.*yref);
subplot(2,1,1), plot(yref+4,'g')
title('Shift and Sum')
hold on
plot(yN,'r')
plot(y,'--','color',[0 0 0])
set(gca,'xticklabel',[])
xlim([1,256])
ylim([-3,6])
legend('Ref Signal','Noisey Signal','Burried Signal')
hold off

subplot(2,1,2), plot(MF,'m')
xlim([1,256])
title('Matched Filter Output')
set(gca,'NextPlot','replacechildren');

for j = 1:length(yref)
    MF(j) = sum(yN.*circshift(yref',j)');
    
    % Initialize movie
    subplot(2,1,1), plot(circshift(yref',j)+4,'g')
    title('Shift and Sum')
    hold on
    plot(yN,'r')
    plot(y,'--','color',[0 0 0])
    set(gca,'xticklabel',[])
    xlim([1,256])
    ylim([-3,6])
    legend('Ref Signal','Noisey Signal','Burried Signal')
    hold off
    
    subplot(2,1,2), plot(MF,'m')
    xlim([1,256])
    title('Matched Filter Output')
    frame = getframe(gcf);
    writeVideo(v, frame.cdata);
end
close(v)