MATLAB Central Newsreader - How to identify frequencies of a random signal

How to identify frequencies of a random signal

Nguyen Le Hoa — Mon, 02 Feb 2009 15:40:03 -0500

Hi all,
I have a random signal with unknown frequency components. How can I estimate the frequencies of that signal using matlab?

Thank you for your help!

Re: How to identify frequencies of a random signal

David — Mon, 02 Feb 2009 15:50:18 -0500

"Nguyen Le Hoa" <nguyenlehoastc@yahoo.com> wrote in message <gm744j$f2l$1@fred.mathworks.com>...
> Hi all,
> I have a random signal with unknown frequency components. How can I estimate the frequencies of that signal using matlab?
>
> Thank you for your help!

doc fft

Re: How to identify frequencies of a random signal

Johan Carlson — Mon, 02 Feb 2009 20:06:01 -0500

"David" <dave@bigcompany.com> wrote in message <gm74nq$p33$1@fred.mathworks.com>...
> "Nguyen Le Hoa" <nguyenlehoastc@yahoo.com> wrote in message <gm744j$f2l$1@fred.mathworks.com>...
> > Hi all,
> > I have a random signal with unknown frequency components. How can I estimate the frequencies of that signal using matlab?
> >
> > Thank you for your help!
>
> doc fft

Or, if it's purely random

doc spectrum

/JC