[aprssig] High speed modems?

John D. Hays john at hays.org
Mon Jul 18 13:26:37 CDT 2016


For backhaul and point-to-point, the work at http://hamwan.org is well
worth understanding.

On Mon, Jul 18, 2016 at 10:15 AM, Greg D via aprssig <aprssig at tapr.org>
wrote:

> 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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-- 

------------------------------
John D. Hays
K7VE

PO Box 1223, Edmonds, WA 98020-1223
   <http://k7ve.org/blog>  <http://twitter.com/#!/john_hays>
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