i remember the gr-fsk4 demodulator uses the message queue to send frequency
correction info to a pre-demod freq-xlating filter.
Check out the code here maybe it will help
http://7120804464424340617-a-1802744773732722657-s-sites.googlegroups.com/site/radiorausch/GnuradioFourLevelFSK.html
Sent fro
Thanks Matt, and Michael, for your input.
To clarify: I was thinking about a frequency offset detection at a later
stage in the demodulation process, which feeds back the frequency offset
to an initial xlating FIR filter (I do realise feeding back individual
samples is kind of ridiculous from a sc
On 04/29/2010 08:23 AM, Martin Braun wrote:
On Thu, Apr 29, 2010 at 12:00:33PM +0200, Martin Braun wrote:
However, I think there's no direct way to feed back data between blocks.
You need to create a feed-forward structure, i.e. have a synchronisation
block near the beginning that outputs the fr
Hi Martin -
On Apr 29, 2010, at 9:23 AM, Martin Braun wrote:
y(n) = x(n) + x(n-2)
My question is: can GNU Radio be modified to accept this? It's a
perfectly valid flow graph (similar to ones you find in DSP
textbooks),
and thanks to the history of the delays, one that should work. I'd be
ver
On Thu, Apr 29, 2010 at 12:00:33PM +0200, Martin Braun wrote:
> However, I think there's no direct way to feed back data between blocks.
> You need to create a feed-forward structure, i.e. have a synchronisation
> block near the beginning that outputs the frequency offset to your
> frequency correc
On Wed, Apr 28, 2010 at 11:29:16PM +, Nick Foster wrote:
> I'm struggling with what I hope isn't a naive problem regarding feedback
> between flowgraph blocks. I've written a simple frequency estimator for FSK
> signals based on the squared FFT method. Its input is an N-point FFT, created
>
Hi all,
I'm struggling with what I hope isn't a naive problem regarding feedback
between flowgraph blocks. I've written a simple frequency estimator for FSK
signals based on the squared FFT method. Its input is an N-point FFT, created
by an N-item stream-to-vector block feeding an N-bin FFT bl
