Re: findDelay.m

[Juan Pablo Carbajal]

On Tue, May 14, 2013 at 3:53 PM, MV <address@hidden> wrote:
> I have two periodical signals, not sinoildal. I don't know how the function
> works. I'll try to find a matlab m file...
>
> Marcos Varella de Almeida
> address@hidden
> (92) 8821-6511
>
> Em 14/05/2013 09:25, "Juan Pablo Carbajal" <address@hidden> escreveu:
>
>> On Tue, May 14, 2013 at 2:24 PM, MV <address@hidden> wrote:
>> > Hi there
>> >
>> > Thanks for the answer.
>> >
>> > http://www.mathworks.com/help/comm/ref/finddelay.html
>> >
>> > Marcos Varella de Almeida
>> > address@hidden
>> > (92) 8821-6511
>> >
>> > Em 14/05/2013 08:20, "Juan Pablo Carbajal" <address@hidden>
>> > escreveu:
>> >
>> >> On Tue, May 14, 2013 at 1:56 PM, MV <address@hidden> wrote:
>> >> > Hi there,
>> >> >
>> >> > Does Octave have an similar function as matlab "findDelay"?
>> >> >
>> >> > How can I use it on Octave?
>> >> >
>> >> > Thanks!
>> >> >
>> >> > Marcos Varella de Almeida
>> >> > address@hidden
>> >> > (92) 8821-6511
>> >> >
>> >> >
>> >> > _______________________________________________
>> >> > Help-octave mailing list
>> >> > address@hidden
>> >> > https://mailman.cae.wisc.edu/listinfo/help-octave
>> >> >
>> >>
>> >> That is from hte communication system toolbox. Please check in
>> >> Octave-Forge
>> >> http://octave.sourceforge.net/packages.php
>> >>
>> >> If you do not find it, can you tell what is the algorithm their are
>> >> using? If you can then (maybe a publication?) then it can be
>> >> implemented.
>> >>
>> >> Cheers
>>
>> So do you understand how they calculate the delay?
>> Check the first row of the table of methods.
>> "Cross-correlating the columns of X and Y over a range of lags
>> -MAXLAG:MAXLAG."
>>
>> How would you get the delays from that?

Be aware that using mathworks files without having a legal copy of the
toolbox is a violation of some terms of use...

In anycase, think what is your definition of delay between two
signals. If you read carefully what the function says their definition
is base din some properties of the correlation function. Probably they
look at the delays when the correlation has a local maxima.