pls i need a code that can be used to detect the peak of signal (peak detector)

pls i need a code that can be used to detect the peak of signal (peak detector)

Answer 1

[Wayne King]

Do you have the Signal Processing Toolbox, have you looked at findpeaks()?

Answer 2

[bala sadiq]

No, i have no signal processing toolbox. can you pls tell me how to access it. I am relatively new in the field.

[Jan]

You'd have to buy this toolbox from MathWorks.

Answer 3

[Jan]

Did you search in the FileEchange already?

http://www.mathworks.com/matlabcentral/fileexchange/index?utf8=%E2%9C%93&term=find+peaks

You find a very large number of solutions for standard and non-standard problems there.

[bala sadiq]

thank you, i am grateful your advice have really work for me.

[Jan]

If it works, accepting the answer would be a signal for others, that you do not need further suggestion.

[bala sadiq]

i used the following code to call a function that detect the peaks of a signal spectra generated. How do i display the values of these peaks. Pls i need your help.

figure % Plot peaks of the spectrum. [peaks, locs] = findpeaks (2*abs(OutputSignal(1:NFFT/2))) plot (2*abs(OutputSignal(1:NFFT/2))); hold on; plot (locs, peaks, 'r')

[Chinnaiah Golla]

In the above code you've used, 'locs' will contain the locations next to the detected peaks.

Have you observed it??

So, if you want to locate the peaks, try the below one...

stem(locs-1,peaks,'are'); % To display in a discrete manner

plot(locs-1,peaks,'are'); % To display in an analog manner

Answer 4

[Image Analyst]

Here's one that doesn't need any toolbox. Go to the web site indicated:

%  Eli Billauer, 3.4.05 (Explicitly not copyrighted).
%  http://billauer.co.il/peakdet.html
%  This function is released to the public domain; Any use is allowed.