I have an amateur radio license (mostly CW/HF and some VHF/UHF
experience) and I've written some driver software for an IQ demodulation
board but I have to admit, I would have no idea how to begin setting up
that system as initially described by Attila and expanded by you and
others. I have a rudimentary understanding of the modulation schemes
involved but I don't fully understand how the various codes mentioned
fit in. I've poked around a bit at some articles on PN codes and I can
see how data would be transmitted but I think I'm missing something key
that allows you to extract positions, velocities, etc. out of the
various links. I think I have some more reading to do :)
Thanks,
-Bob
On 04/03/2015 06:08 AM, Magnus Danielson wrote:
I think this is a good idea, and it is relatively straight-forward to do.
You can observe both code and carrier phase this way, given that the
transmitting radio is coherent with the code generation clock. Doppler
also pops out of the tracking station.
A good coding-gain reduces the need for a strong transmitter.
The issue might be the allowed width of the signal being transmitted,
forcing the chipping rate down.
Cheers,
Magnus
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