On Tue, Nov 12, 2013 at 05:09:56PM +1100, Tony Langdon wrote:
On 12/11/13 12:17 AM, Paul Stoetzer wrote:
An interesting idea would be trying a FreeDV QSO via satellite. I've made a few QSOs with it on HF and it's an interesting mode.
Obviously it's full duty-cycle, so any attempts should be limited to just a few tests, but I'm sure it would work.
I suspect you'd need computer Doppler correction with the FDMDV modem. The high PAPR would limit the stress on a linear transponder. The (yet to be finalised) VHF GMSK variant might be easier to handle from a Doppler point of view, though at a higher average power (since it's constant envelope like FM).
You could simulate doppler by injecting a suitable voltage ramp into your RIT control, making your HF rig "drift" in a known way.