Maria,
You can’t readily do it that way. The demodulator works at baseband,
opening
it up to that extent, unless you have a very wideband signal, wouldn’t
work.
My solution is to use the frequency translating FIR filter block to
shift
your received frequency to baseband. I am doing this at VHF where I only
need to cope with ±3kHz. You can get Doppler information from a
prediction
program. I use predict which has a server mode and can be communicated
with
using UDP. I wrote a block as I had other things to do, but if you just
want
Doppler I think you can do it relatively easily with UDP, or by running
another process to call the gnuradio script via XMLRPC.
Mike
Maria Hg (vnisnvoeoi https://www.ruby-forum.com/user/show/vnisnvoeoi )
on 2014-11-29 18:44
Hello,
I’m using GNU Radio companion to try to receive a satellite signal in S
band.
As I have read with a doppler shift will be around ~60kHz. This will
affect both the carrier frequency as well as the baseband signal.
I’m trying to set the parameters of the PSK demod (Frequency BW, time
BW, phase BW) to correct the doppler. Right know they are set to 62.8m.
I have been trying to find information about how to configurate this
parameters but I can’t find information anywhere.
Thank you