Re: [Discuss-gnuradio] Realtime FFT (No GUI)

[Brian Padalino]

On Mon, Nov 10, 2008 at 4:08 PM, Eric Blossom <address@hidden> wrote:
> On Mon, Nov 10, 2008 at 04:02:12PM -0500, Mayank Goel wrote:
>> Hi all,
>>
>> I am new to GNURadio. I need to do realtime FFT (GUI is not required). I
>> need to feed this FFT to other components of the system so I ned simple
>> FFT values of the signal. I tried hacking the fftsink2.py and was able to
>> get the values but the problem is that the rate of data is very less. I
>> am getting 15-16 FFTs in a second. This is too less.
>>
>> Can you suggest me a way to improve this?
>
>
> Just use the gr.fft_vcc block.
>
> Eric

On a related note, I am curious if anyone has looked into using djbfft
as opposed to FFTW?  I know it hasn't been updated in a while, but it
appears to be extremely fast:

    http://cr.yp.to/djbfft.html

Just wondering.

Brian