Hi all,
time is moving fast, and I want to start some initial discussion and
planning for OsmoDevCon 2014.
There are basically four questions which I'm raising below. Please
provide your feedback to the osmocom-event-orga mailing list only, to
avoid cross-posting over all the project lists.
= Who? =
My intention is to keep it an 'active developer/contributer only' event,
like we had it before. I would also want to keep the group relatively
small, to keep the 'Osmocom family' atmosphere.
If desired, we could have one half or full day of public prsentations in
a larger auditorium, but the developer meeting should be a close group,
as known so far.
= Where? =
If we keep the number of attendees within the same range as this year,
then I'm sure we could again hold it at the same venue. I know it is
not perfect, but it is a place that we have access to, 24 hours per day,
and free of cost for community projects like osmocom.org.
If the community wants a larger event, then this is something that would
require more funds and much more time organizing. And that is something
that I personally could not offer to take care of, sorry. I'm happy to
attend and support any larger events, but I'm unable to take care of
fundraising and venue research.
= When? =
Q1/2014. In January, I'm not aware of any 'blocker' events. February,
there is Fosdem (Feb 1 + Feb 2), and MWC from Feb 24 through Feb 27. In
March there is CeBIT (March 10-14) and Easter holidays (with EasterHegg
March 17-21). Did I miss any other FOSS / mobile event that might clash
in Q1?
So my preference woudl be to do it either late January (23-26) or in
February (6-9 or 13-16). Any preferences regarding preferred schedule?
Once we have some concencus here on the list [and we want to do it in
the same size / venue], I'll talk to IN-Berlin.
= What? =
I think that question is easy to answer, if we have the above three
figured out... There's no shortage of topics, I suppose.
You can start adding your suggestions to
http://openbsc.osmocom.org/trac/wiki/OsmoDevCon2014
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
Hi Folks,
I have a sample tetra signal without encryption. I generate a test signal from the tetra sample with a vector signal generator.(@394MHz carrier and 96KHz sampling rate)
I try to receive and listen this test signal realtime with USRP N200 and osmocom tetra. I combine all the osmocom tetra parts in one script (seen below) but speech is not continuous and aplay gives underrun warnings. The cpu usage is approximately %30 and there is no memory or disk write/read speed problem. I wonder what is the problem and how can i listen realtime tetra speech.
I also test demodulator offline and then try the rest of the script realtime and there is no problem, i can listen continuous speech without any gap. So i suspect from the demodulator performance..
I am using Ubuntu 12.04 64bit, Gnuradio 3.6.5.1, UHD 003.005, SSD disk, 8GB Ram, Intel i7-3520M CPU.
Thanks..
------------------------------------------------------------------
#!/bin/bash
sudo sysctl -w net.core.wmem_max=1048576
sudo sysctl -w net.core.rmem_max=50000000
rm /tmp/out.float /tmp/out.bits /tmp/out.codec /tmp/out.pcm /tmp/traffic.out
mkfifo /tmp/out.float
mkfifo /tmp/out.bits
mkfifo /tmp/out.codec
mkfifo /tmp/out.pcm
mkfifo /tmp/traffic.out
~/Desktop/osmo-tetra/src/demod/python/uhd-tetra_demod.py -f 394E6 -o /tmp/out.float &
float_to_bits /tmp/out.float /tmp/out.bits &
tetra-rx /tmp/out.bits &
cdecoder /tmp/traffic.out /tmp/out.codec &
sdecoder /tmp/out.codec /tmp/out.pcm &
aplay -fS16_LE /tmp/out.pcm
rm /tmp/out.float
rm /tmp/out.bits
rm /tmp/out.codec
rm /tmp/out.pcm
------------------------------------------------------------------
Furkan Elibol
PhD Candidate
Ozyegin University
Hi Folks,
I have a sample tetra signal without encryption. I generate a test signal from the tetra sample with a vector signal generator.(@394MHz carrier and 96KHz sampling rate)
I try to receive and listen this test signal realtime with USRP N200 and osmocom tetra. I combine all the osmocom tetra parts in one script (attached) but speech is not continuous and aplay gives underrun warnings. The cpu usage is approximately %30 and there is no memory or disk write/read speed problem. I wonder what is the problem and how can i listen realtime tetra speech.
I also test demodulator offline and then try the rest of the script realtime and there is no problem, i can listen continuous speech without any gap. So i suspect from the demodulator performance..
I am using Ubuntu 12.04 64bit, Gnuradio 3.6.5.1, UHD 003.005, SSD disk, 8GB Ram, Intel i7-3520M CPU.
Thanks..
------------------------------------------------------------------
#!/bin/bash
sudo sysctl -w net.core.wmem_max=1048576
sudo sysctl -w net.core.rmem_max=50000000
rm /tmp/out.float /tmp/out.bits /tmp/out.codec /tmp/out.pcm /tmp/traffic.out
mkfifo /tmp/out.float
mkfifo /tmp/out.bits
mkfifo /tmp/out.codec
mkfifo /tmp/out.pcm
mkfifo /tmp/traffic.out
~/Desktop/osmo-tetra/src/demod/python/uhd-tetra_demod.py -f 394E6 -o /tmp/out.float &
float_to_bits /tmp/out.float /tmp/out.bits &
tetra-rx /tmp/out.bits &
cdecoder /tmp/traffic.out /tmp/out.codec &
sdecoder /tmp/out.codec /tmp/out.pcm &
aplay -fS16_LE /tmp/out.pcm
rm /tmp/out.float
rm /tmp/out.bits
rm /tmp/out.codec
rm /tmp/out.pcm
------------------------------------------------------------------
Furkan Elibol
PhD Candidate
Ozyegin University
hello
I have the following error running fcdp-tetra_demod.py
./170913/src/demod/python/
fcdp-tetra_demod.py -D hw:1 -o /dev/stdout | ./170913/src/float_to_bits
/dev/stdin /dev/stdout | ./170913/src/tetra-rx /dev/stdin
Traceback (most recent call last):
File "./170913/src/demod/python/fcdp-tetra_demod.py", line 5, in <module>
from gnuradio import gr, gru, audio, eng_notation, blks2, optfir
ImportError: cannot import name blks2
In Gnuradio 3.7
Block blk2 has been replaced by digital - if the block replaced then the
following error occured :
then optfir can't be opened --> optfir is reference to optfir.py or
optfir.pyc ?
If I remove optfir , I have error with sound card access and this :
in line 83
tb = my_top_block(options)is also with erreur
--
Hello
I have the following error running fcdp-tetra_demod.py
./170913/src/demod/python/fcdp-tetra_demod.py -D hw:1 -o /dev/stdout |
./170913/src/float_to_bits /dev/stdin /dev/stdout | ./170913/src/tetra-rx
/dev/stdin
Traceback (most recent call last):
File "./170913/src/demod/python/fcdp-tetra_demod.py", line 5, in <module>
from gnuradio import gr, gru, audio, eng_notation, blks2, optfir
ImportError: cannot import name blks2
Gnuradio is 3.7.2
Liboscomore has been download from
git clone git://git.osmocom.org/libosmocore.git
no error in Gnuradio liboscomore , Tetra-rx installation
Saw that Gnuradio has different blocks structures and a programm to migrate
from 3.6.51 to 3.7
Thanks for answer
Hello,
is anybody aware of encrypted TETRA networks which are not run
by the government or police ? I am especially interested about
Germany, as far as I am aware all the TETRA networks which
use encryption here are the BOS networks.
There are of course several networks which use authentication,
but no encryption.
Best regards,
Dieter
--
Dieter Spaar, Germany spaar(a)mirider.augusta.de
Hi,I successfully compiled and used Osmocom Tetra at its very first releases then left it aside for a while.I
was now trying to rebuild it on my freshly reinstalled pc but I see it
has not been updated to run on the current GR 3.7. Updating the "import" section was
easy, but now I'm facing some errors (filter definitions in I
reckon) beyond my expertise.Any hint on the most recent version of GR Osmocom-Tetra will run on?
Thanks
Stefano
I'm starting development of an audio tetra codec for our critical communications platform based on ETSI c-code.
Did you have any samples that I can use as example for ETSI C-Code decoder?
Thank you,
--
Vitor Espíndola
