FPGA Central

Hai,

I want to do the main project as Implementation of 1024 point FFT in
Actel FPGA.I have to find a new frequency identification algorithm
other than Fast Fourier Transform.Please give valuable notes,codes and
suggestions for successully completing this project.

Thanking you.
I.Sivakumar

In article <[email protected] com>,
cisivakumar <[email protected]> wrote:
>Hai,
>
> I want to do the main project as Implementation of 1024 point FFT in
>Actel FPGA.I have to find a new frequency identification algorithm
>other than Fast Fourier Transform.Please give valuable notes,codes and
>suggestions for successully completing this project.

Mr Sivakumar,

I'm not quite sure what stage in your studies you're at -- I'm going
to guess this is a project for the last year of a university degree in
electronic engineering. Does the university give a list of titles for
possible projects and ask you to pick one?

I think your career prospects would be more improved by taking courses
in how to write formal English than by finishing this project. What
you've written comes across as very terse and rather rude; you make no
indication that you've put work into the project yourself before
asking people to help you. "Please give" is a perfunctory request; a
more humble form like "could anyone offer me" might well make people
more keen to reply.

I _think_ that any method for identifying frequencies has to be
equivalent to the Fourier transform, basically by the definition of
'frequency'. You could use the definition of frequency as
repetitiveness, and compute autocorrelations (pick the value of a to
maximise sum f(N) f(N+a)) but the efficient way of computing
autocorrelations is via the FFT again.

Tom

cisivakumar wrote:

>Hai,
>
> I want to do the main project as Implementation of 1024 point FFT in
>Actel FPGA.I have to find a new frequency identification algorithm
>other than Fast Fourier Transform.Please give valuable notes,codes and
>suggestions for successully completing this project.
>
>
You might look up Hadamard transforms. I never was able to find any
references to the Van Geen transform, but there was an article in about 1965
in the ARRL magazine by a John (I think) Van Geen who built an amazingly
simple frequency detection analyzer using simple digital circuits. His ADC
was taken to the degenerate form of 1 bit (a comparator). I think some
later "audio spectrum analyzer" modules used his technique, so it ought to
be written up somewhere.

Jon

cisivakumar wrote:
> Hai,
>
> I want to do the main project as Implementation of 1024 point FFT in
> Actel FPGA.I have to find a new frequency identification algorithm
> other than Fast Fourier Transform.Please give valuable notes,codes and
> suggestions for successully completing this project.
>
> Thanking you.
> I.Sivakumar
>

Has anyone tried the Goertzel Algorithm??
I read about it in the embedded magazine.

http://www.embedded.com/story/OEG20020819S0057

Brijesh