Similarity measure for signals

 Hello,

 I'm currently working with a new parametric spectral estimation technique
(it achieves better resolution frequency than the FFT for instance) and I
would like to use it so as to find similarities between two or more signals
based on their frequency components.
 I could use the cross correlation or the correlation coefficient but by
this way I do not take advantage of the tool that I have in my disposal. Is
there any way to make a comparison of signals based on the their frequency
values?? 

Thanks,
Kostas

On Mon, 08 Aug 2011 10:45:41 -0500, "fidaki35"
<fidaki35@n_o_s_p_a_m.hotmail.com> wrote:

> Hello,
>
> I'm currently working with a new parametric spectral estimation technique
>(it achieves better resolution frequency than the FFT for instance) and I
>would like to use it so as to find similarities between two or more signals
>based on their frequency components.
> I could use the cross correlation or the correlation coefficient but by
>this way I do not take advantage of the tool that I have in my disposal. Is
>there any way to make a comparison of signals based on the their frequency
>values?? 
>
>Thanks,
>Kostas

Is there a reason not to use correlation in the frequency domain?


Eric Jacobsen
http://www.ericjacobsen.org
http://www.dsprelated.com/blogs-1//Eric_Jacobsen.php

fidaki35 wrote:

>  Hello,
> 
>  I'm currently working with a new parametric spectral estimation technique
> (it achieves better resolution frequency than the FFT for instance) and I
> would like to use it so as to find similarities between two or more signals
> based on their frequency components.
>  I could use the cross correlation or the correlation coefficient but by
> this way I do not take advantage of the tool that I have in my disposal. Is
> there any way to make a comparison of signals based on the their frequency
> values?? 
> 
> Thanks,
> Kostas
> 
>