How do I find the period of a random signal?
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Let's imagine that a friend of mine made a vector with this following attributes:
x = 0:0.001:20
y = exp(-x/30).*sin((2*pi/5)*x)
xx = x(end);
t = [x x+xx x+2*xx x+3*xx];
f = [y y y y];
Then, I got a function like this
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/164483/image.jpeg)
He saved the vector t and f and then he sent them to me.
What I have to do is to find the period of the signal f(t) at matlab using the data of t and f. I'm having some issues trying to do this... I can't find 20 as my period valor. I have already tried finding period with zero-crossing strategies, autocorelation, but nothing that I did was effective. Could you guys help me solving this?
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MathReallyWorks
2017 年 5 月 26 日
Hello henrique,
Did you see Mohammad Abouali's answer on a similar question? How to calculate period of signal with matlab
If not then check it out. Autocorrelation is being used to find the period of signal.
3 件のコメント
Mousumi Nag
2017 年 7 月 7 日
@Henrique Moura: I am also working with a random signal to find its period. If you come across the way to solve your problem (that gives period value as 20), can you please share the steps here. Thanks in advance.
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