[amsat-bb] Re: D STAR

Tony Langdon vk3jed at gmail.com
Mon Nov 11 22:09:56 PST 2013

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).

73 de Tony VK3JED/VK3IRL

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