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Discussion Groups | Matlab DSP | FFT source code

Technical discussion about Matlab and issues related to Digital Signal Processing.

  

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FFT source code - Miguel Baz - Jul 30 21:00:08 2006

Hi!!
  I'm new in this. I've just wanted to know if somebody have the source code of
the fft library that uses matlab. Or if somebody knows how does matlab do the
fft algorithm. The things is that i have to export it to an embedded system and
if i don't have the code i can't do the calculation of the fft
   
  Thanks
   
  Migel





Re: FFT source code - PRAJIT S NAIR - Aug 3 8:18:59 2006

 Hi Migel

1) All the source codes are available in the toolbox directory
          MATLAB\toolbox
2) FFT in Matlab
    FFT(X) is the discrete Fourier transform (DFT) of vector X.

See the file name FFT.m in the toobox directory...
Path:
Matlab\toolbox\comm\comm\@gf
With Best Regards
 Prajit
On 7/28/06, Miguel Baz <t...@yahoo.es> wrote:
>
>    Hi!!
> I'm new in this. I've just wanted to know if somebody have the source code
> of the fft library that uses matlab. Or if somebody knows how does matlab
do
> the fft algorithm. The things is that i have to export it to an embedded
> system and if i don't have the code i can't do the calculation of the fft
>
> Thanks
>
> Migel
>

--





Re: FFT source code - Yuka - Aug 3 8:21:32 2006

i think the matlab code for the fft is "closed" so you can't see
it
and re use it, you can see the implementations of the open source clon
alternatives like octave or sci-lab (and if you plan to "copy",
better
choose the GPL's option if your project will be GPL, in another case
you'll going to break copyrights, or find some "public domain"
implementation)
but i think is better to understand the algorithm first, there are
many variants, and you should find someone that will fit in your
requierements... there many links in the web...
write again with more details

one example: http://www.archelon.com/advanced_code.html

On 7/28/06, Miguel Baz <t...@yahoo.es> wrote:
>    Hi!!
> I'm new in this. I've just wanted to know if somebody have the source code
of the fft library that >uses matlab. Or if somebody knows how does matlab do
the fft algorithm. The things is that i >have to export it to an embedded
system and if i don't have the code i can't do the calculation >of the fft
-- 
blog: http://audiores.wordpress.com
Yuconner





Re: FFT source code - Bimol Waikhom - Aug 3 8:22:48 2006

Hi Miguel,
The FFT in Matlab is a builtin function.
This function uses the FFTW library whose source code in C and documents can
be downloaded from www.fftw.org

bimol
On 7/28/06, Miguel Baz <t...@yahoo.es> wrote:
>
>    Hi!!
> I'm new in this. I've just wanted to know if somebody have the source code
> of the fft library that uses matlab. Or if somebody knows how does matlab
do
> the fft algorithm. The things is that i have to export it to an embedded
> system and if i don't have the code i can't do the calculation of the fft
>
> Thanks
>
> Migel
>





Re: FFT source code - PRAJIT S NAIR - Aug 4 7:45:40 2006

Thankx Bimol...
I didn't notice it till now...
http://www.mathworks.com/access/helpdesk/help/techdoc/ref/fft.html

Regards
Prajit
On 8/1/06, Bimol Waikhom <b...@gmail.com> wrote:
>
>   Hi Miguel,
> The FFT in Matlab is a builtin function.
> This function uses the FFTW library whose source code in C and documents
> can be downloaded from www.fftw.org
>
> bimol
> On 7/28/06, Miguel Baz <t...@yahoo.es> wrote:
>
> >    Hi!!
> > I'm new in this. I've just wanted to know if somebody have the source
> > code of the fft library that uses matlab. Or if somebody knows how
does
> > matlab do the fft algorithm. The things is that i have to export it to
an
> > embedded system and if i don't have the code i can't do the
calculation of
> > the fft
> >
> > Thanks
> >
> > Migel
> >
> >
> >
> >
>  
>

--





Re: FFT source code - Miguel Baz - Aug 26 9:03:11 2006

Sorry I've just come from my holidays. Thank you everybody for answering.
   
  We have a micro (Atmega128), I think I have no problem with the powers of 2.
  I've found a lot of source codes for the fft but almost all were unreadable.
I've found some code of the fft fo matlab but...bufff...its really difficult to
understand.
   
  If somebody have some code of the fft please send me. I'm looking for
something easy and readablere.
   
  Thank you again.
   
  Miguel

jon duncan <d...@yahoo.com> escribió:
  Miguel,
what type of embedded system are you using? 
Matlab uses radix 2 so you have to enter a power of 2.
Sort of ignores the needs of those who need a prime
factor algorithm. 

Jon

--- Miguel Baz wrote:

> Hi!!
> I'm new in this. I've just wanted to know if
> somebody have the source code of the fft library
> that uses matlab. Or if somebody knows how does
> matlab do the fft algorithm. The things is that i
> have to export it to an embedded system and if i
> don't have the code i can't do the calculation of
> the fft
> 
> Thanks
> 
> Migel
> 
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