[aprssig] High speed modems?

Greg D ko6th.greg at gmail.com
Mon Jul 18 13:15:17 EDT 2016

How far do you need to go?  Does it really need to be on VHF/UHF channels?

I'm wondering if 2.4ghz Wi-Fi could be used instead?  Something like
http://www.broadband-hamnet.org/ perhaps, or just set up some gain
antennas for a back-haul point to point connection.

Greg  KO6TH

SARTrack Admin via aprssig wrote:
> 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/

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