[aprssig] High speed modems?

John D. Hays john at hays.org
Mon Jul 18 10:19:03 EDT 2016

NW Digital Radio nwdigitalradio.com is working on such a radio and has the
UDRC as a platform for existing radios.

On Jul 18, 2016 1:05 AM, "SARTrack Admin via aprssig" <aprssig at tapr.org>

> This is a bit off topic, but I have been asked (and not for the first
> time) if there is a way to do emergency communications on VHF/UHF at
> reasonably medium to higher speed.
> My SARTrack software can do some of the work via APRS, but due to the
> connectionless state, it is not very suitable for reliabe transfer of
> critical data, and it is way to slow.
> I have users who are now looking at DMR for data transfers (because they
> already use commercial DMR radios for Voice and GPS location data) but
> these radios are by default very narrow-band, and are aiming more towards
> the 6.26 kc bandwidth than to 25 kb bandwidth, let alone more.
> What we really need is a fully digital VHF or UHF radio modem, which
> enables us to do make one-to-one connections, and possibly some kind of
> one-to-many data transfers.
> Looking at the TAPR website, most of the things I find there are very
> old.  I would like to find some kind of system which uses the latest
> technologies to get the most data over a bandwidth which can still be used
> in VHF/UHF.
> If there is a mailing list more suitable for this topic, please let me
> know.
> Thanks,
> Bart ZL4FOX
> http://www.sartrack.nz/
> --
> Bart Kindt
> SARTrack Developer and CEO
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