How can I detect a peak signal inside a periodic pulse array and generate the waveform like the figure below?

array_pulse = [0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1,0,0,0]

array_signal = [0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0]

expect_Out = [0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0]

Hello! Guys!

I need help generate the output waveform like the figure above.

I have two array, one is the periodic pulse modulation and the other is the detected signal peak.

When the peak is generated and inside the pulse width at high (which is 1) the output then go high until the falling edge of the pulse array. But when the peak is generated outside the pulse width (like the second peak) then it is 0. And when there is no signal peak inside the pulse width then it all goes 0.

I have thought about it all night. Hope someone can help me process these array! Thank you very much!

Answer 1

[Mathieu NOE]

hello

here you are - hope you will sleep better tonight...

array_pulse   = [0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0,1,1,1,1,0,0,0];
array_signal  = [0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0];
expect_Out = zeros(size(array_pulse));

% init
t = 0:numel(array_pulse)-1;
status = 0;

% first sample code
    if array_signal(1)>0.5 && array_pulse(1)>0.5
        status = 1;
    end
    
    if array_signal(1) - 0 <-0.5
        status = 0;
    end
    expect_Out(1) = status;
    
% second up to last sample code

for ci = 2:numel(array_pulse)
    
    if array_signal(ci)>0.5 && array_pulse(ci)> 0.5
        status = 1;
    end
    
    if array_pulse(ci) - array_pulse(ci-1) < -0.5
        ci
        status = 0;
    end
    expect_Out(ci) = status;
    
end

figure(1);
subplot(311),plot(t,array_pulse,'b');
subplot(312),plot(t,array_signal,'r');
subplot(313),plot(t,expect_Out,'g');

[Kuei-Yang Tseng]

How brilliant way to solve it! I would never thought of it that way.

Thanks your reply!

[Mathieu NOE]

My pleasure !