9 Sep
2020
9 Sep
'20
3:13 p.m.
Hello AMPRNet,
we like to announce a new open source HAMNET-access solution for the
70-cm-band making use of the popular ADALM Pluto SDR.
Lukas Ostendorf recently finished his master thesis "Design of a Radio
Communications Protocol for HAMNET Access in the 70cm Amateur Radio
Band" at our employer Rohde & Schwarz in Munich.
We are pleased to publish his work and further material today:
https://hnap.de/2020/09/08/master-thesis-released.html
There are still some tasks like signal amplification on the roadmap, but
the community is growing and helping to move on.
It seems the telegram group chat is currently the best place to
exchange: https://t.me/hamnet_access_protocol
Most communication is in German, however I'm pretty sure English is fine
as well. At least you will find nice pictures of current experiments in
the backlog :)
Looking forward to your contribution,
for the HNAP-Team,
Jann
DG8NGN
--
Jann Traschewski, Faber-Castell-Str. 9, D-90522 Oberasbach, Germany
Tel.: +49-911-99946898, Mobile: +49-170-1045937, E-Mail: jann(a)gmx.de
Ham: DG8NGN / DB0VOX / DB0FOX / DB0ZM / DB0DBA / DB0HZS
13 Oct
13 Oct
10:18 a.m.
Hi Jann,
I understand that the ADALM Pluto SDR platform could make 23cm as well.
Do you think there would be any problem using Lukas HNAP implementation
on 23cm, not only 70?
On 2020-09-09 22:13, Jann Traschewski via 44Net wrote:
Hello AMPRNet,
we like to announce a new open source HAMNET-access solution for the
70-cm-band making use of the popular ADALM Pluto SDR.
Lukas Ostendorf recently finished his master thesis "Design of a Radio
Communications Protocol for HAMNET Access in the 70cm Amateur Radio
Band" at our employer Rohde & Schwarz in Munich.
We are pleased to publish his work and further material today:
https://hnap.de/2020/09/08/master-thesis-released.html
There are still some tasks like signal amplification on the roadmap, but
the community is growing and helping to move on.
It seems the telegram group chat is currently the best place to
exchange: https://t.me/hamnet_access_protocol
Most communication is in German, however I'm pretty sure English is fine
as well. At least you will find nice pictures of current experiments in
the backlog :)
Looking forward to your contribution,
for the HNAP-Team,
Jann
DG8NGN
--
Jann Traschewski, Faber-Castell-Str. 9, D-90522 Oberasbach, Germany
Tel.: +49-911-99946898, Mobile: +49-170-1045937, E-Mail: jann(a)gmx.de
Ham: DG8NGN / DB0VOX / DB0FOX / DB0ZM / DB0DBA / DB0HZS
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44Net mailing list
44Net(a)mailman.ampr.org
https://mailman.ampr.org/mailman/listinfo/44net
.
15 Oct
15 Oct
2:56 p.m.
Hi Bjorn,
yes, HNAP4PlutoSDR will even work on the 23-cm-band. Lukas tried it
successfully with the latest release candidate (rc1) on 1298,850 MHz
(Basestation) and 1242,850 MHz (Client).
Just have a look at the following file and adjust the parameters "dl_lo"
and "ul_lo":
https://github.com/HAMNET-Access-Protocol/HNAP4PlutoSDR/blob/master/config.…
You could even use frequencies for cross-band operation (e.g. 23-cm
downlink and 70-cm uplink), however we need to fix the carrier frequency
offset calculation first. See Issue 43:
https://github.com/HAMNET-Access-Protocol/HNAP4PlutoSDR/issues/43
Thanks for bringing this up. The system is designed for multi-user
access, however we might be able to revive some old 23-cm full-duplex
interlinks we used for packet radio quite a while ago :) We should make
more use of our bands!
73,
Jann
DG8NGN
On 13.10.2020 17:18, Bjorn Pehrson via 44Net wrote:
Hi Jann,
I understand that the ADALM Pluto SDR platform could make 23cm as well.
Do you think there would be any problem using Lukas HNAP implementation
on 23cm, not only 70?
On 2020-09-09 22:13, Jann Traschewski via 44Net wrote:
Hello AMPRNet,
we like to announce a new open source HAMNET-access solution for the
70-cm-band making use of the popular ADALM Pluto SDR.
Lukas Ostendorf recently finished his master thesis "Design of a Radio
Communications Protocol for HAMNET Access in the 70cm Amateur Radio
Band" at our employer Rohde & Schwarz in Munich.
We are pleased to publish his work and further material today:
https://hnap.de/2020/09/08/master-thesis-released.html
There are still some tasks like signal amplification on the roadmap, but
the community is growing and helping to move on.
It seems the telegram group chat is currently the best place to
exchange: https://t.me/hamnet_access_protocol
Most communication is in German, however I'm pretty sure English is fine
as well. At least you will find nice pictures of current experiments in
the backlog :)
Looking forward to your contribution,
for the HNAP-Team,
Jann
DG8NGN
--
Jann Traschewski, Faber-Castell-Str. 9, D-90522 Oberasbach, Germany
Tel.: +49-911-99946898, Mobile: +49-170-1045937, E-Mail: jann(a)gmx.de
Ham: DG8NGN / DB0VOX / DB0FOX / DB0ZM / DB0DBA / DB0HZS
_________________________________________
44Net mailing list
44Net(a)mailman.ampr.org
https://mailman.ampr.org/mailman/listinfo/44net
.
_________________________________________
44Net mailing list
44Net(a)mailman.ampr.org
https://mailman.ampr.org/mailman/listinfo/44net
3:23 p.m.
Thanks Jann. Our use case is access links to and backup links in our
5GHz backbone in amprnet.se. We have done some successful experiments
with NPR70 for that purpose but since our regulator has given us a more
narrow 70cm band (432-438 MHz) than many other countries, we are also
looking at 23cm.
On 2020-10-15 21:56, Jann Traschewski via 44Net wrote:
Hi Bjorn,
yes, HNAP4PlutoSDR will even work on the 23-cm-band. Lukas tried it
successfully with the latest release candidate (rc1) on 1298,850 MHz
(Basestation) and 1242,850 MHz (Client).
Just have a look at the following file and adjust the parameters "dl_lo"
and "ul_lo":
https://github.com/HAMNET-Access-Protocol/HNAP4PlutoSDR/blob/master/config.…
You could even use frequencies for cross-band operation (e.g. 23-cm
downlink and 70-cm uplink), however we need to fix the carrier frequency
offset calculation first. See Issue 43:
https://github.com/HAMNET-Access-Protocol/HNAP4PlutoSDR/issues/43
Thanks for bringing this up. The system is designed for multi-user
access, however we might be able to revive some old 23-cm full-duplex
interlinks we used for packet radio quite a while ago :) We should make
more use of our bands!
73,
Jann
DG8NGN
On 13.10.2020 17:18, Bjorn Pehrson via 44Net wrote:
Hi Jann,
I understand that the ADALM Pluto SDR platform could make 23cm as well.
Do you think there would be any problem using Lukas HNAP implementation
on 23cm, not only 70?
On 2020-09-09 22:13, Jann Traschewski via 44Net wrote:
_________________________________________
44Net mailing list
44Net(a)mailman.ampr.org
https://mailman.ampr.org/mailman/listinfo/44net
. Hello AMPRNet,
we like to announce a new open source HAMNET-access solution for the
70-cm-band making use of the popular ADALM Pluto SDR.
Lukas Ostendorf recently finished his master thesis "Design of a Radio
Communications Protocol for HAMNET Access in the 70cm Amateur Radio
Band" at our employer Rohde & Schwarz in Munich.
We are pleased to publish his work and further material today:
https://hnap.de/2020/09/08/master-thesis-released.html
There are still some tasks like signal amplification on the roadmap,
but
the community is growing and helping to move on.
It seems the telegram group chat is currently the best place to
exchange: https://t.me/hamnet_access_protocol
Most communication is in German, however I'm pretty sure English is
fine
as well. At least you will find nice pictures of current experiments in
the backlog :)
Looking forward to your contribution,
for the HNAP-Team,
Jann
DG8NGN
--
Jann Traschewski, Faber-Castell-Str. 9, D-90522 Oberasbach, Germany
Tel.: +49-911-99946898, Mobile: +49-170-1045937, E-Mail: jann(a)gmx.de
Ham: DG8NGN / DB0VOX / DB0FOX / DB0ZM / DB0DBA / DB0HZS
_________________________________________
44Net mailing list
44Net(a)mailman.ampr.org
https://mailman.ampr.org/mailman/listinfo/44net
.
_________________________________________
44Net mailing list
44Net(a)mailman.ampr.org
https://mailman.ampr.org/mailman/listinfo/44net
1501
days inactive
1537
days old
3 comments
2 participants
participants (2)
-
Bjorn Pehrson -
Jann Traschewski