Marcus,
Thanks for the reply! I apologize, the GR package is gr-aoa, not gr-music,
and can
be found here (https://github.com/MarcinWachowiak/gr-aoa
<https://github.com/MarcinWachowiak/gr-aoa>). The NOAA broadcast is a NBFM signal.
I am using 2 Signal Hound receivers (https://signalhound.com/products/bb60c/
<https://signalhound.com/products/bb60c/>) with 2 antennas spaced on a
beam. Do I
need to synchronize the 2 receivers with an external clock, or should they
be fine
free running independently?
Thank you very much,
Michael Berman
On Fri, Sep 1, 2023 at 9:25 AM Marcus Müller <mmueller@gnuradio.org
<mailto:mmueller@gnuradio.org>> wrote:
Not familiar with the details of NOAA signalling, but isn't the carrier
of an FM
signal
*the FM signal*?
For a DoA estimate, you'd correlate the different receive chains with
each other
to get a
phase; so, as long as the signals do have some bandwidth that makes the
problem
less
ambiguous, it'd work with any signal. I'm sadly not familiar with
gr-music (and
can't find
it on cgran.org <http://cgran.org>), but MUSIC works as long as the
signals at
the different receive antennas
are correlated and noise is not. You do not have to preprocess your FM
signal!
Best,
Marcus
On 01.09.23 17:09, Michael Berman wrote:
> Does anybody know if there is a way to recover a carrier of an FM
signal to
use for an
> Angle of Arrival calculation? I am using GNURadio and gr-music and I
am
trying to use the
> NOAA Weather Radio signals.
>
> Thank you very much,
>
> Michael Berman