- tetra - lists.osmocom.org

by Graham Palmer

Hi all Just an enquiry. Has anyone managed to add hyperframe number to tetra_tdma.c file and if so could you let me know. Many thanks' Graham.

10 years, 3 months

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Realtime receiving live tetra signal;

by Furkan Elibol

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

10 years, 5 months

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Realtime receiving live tetra signal;

by Furkan Elibol

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

10 years, 5 months

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fcdp-tetra_demod.py error with Gnuradio 3.7.2 news

by fe8769

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 --

10 years, 7 months

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fcdp-tetra_demod.py error with Gnuradio 3.7.2

by fe8769

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

10 years, 7 months

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Encrypted TETRA Networks ?

by Dieter Spaar

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

10 years, 7 months

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which GnuRadio?

by sinager＠tarapippo.net

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

10 years, 8 months

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nokia/eads thr 880i

by labad jala

Hi folks, do anyone on the list have information/programming software for the Nokia EADS thr880i? Regards.

10 years, 8 months

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Audio Sample for ETSI decoder

by Vitor Espíndola

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

10 years, 9 months

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TETRA SNDCP to a local tun/tap device

by Mccauley

Hi, According to the information in the wiki currently osmo-tetra can forward IP packets contained in TETRA SNDCP to a local tun/tap device have not seen any details of how to do this anywhere in code or wiki.... So I ask, it falls within a these features left unfinished? or is possible with the current code base? If so can anyone provide some example of how to do it. Best regards, -- <>

10 years, 9 months

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Re: Help

by Gregor

You can try this hack I'm using to filter out encrypted traffic and for SSI logging of traffic. There are also a couple of lines I've commented out to write traffic to a pipe for realtime speech decoding. It's a patch against the current master branch, it already includes Sylvains TCH code. Regards > ----- Original Message ----- > From: Javier Coso > Sent: 06/26/13 03:20 PM > To: tetra(a)lists.osmocom.org > Subject: Help > > Hello. > > I am having problems trying to obtain audio files with the ssi name in > osmo-tetra. If someone have it working correctly, could he make a tar of > the source code and send it to me? > > Thanks in advance! > > Regards > -- > Javier Coso

10 years, 9 months

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Help

by Javier Coso

Hello. I am having problems trying to obtain audio files with the ssi name in osmo-tetra. If someone have it working correctly, could he make a tar of the source code and send it to me? Thanks in advance! Regards -- Javier Coso

10 years, 10 months

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Hi !!

by Mathieu Omwave

Hi everybody !! Just subscribe to this mailing list and wants to know if it is possible to run osmotetra with an usrp2, to build a trunked tetra network J Thx Mescal

10 years, 10 months

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Timeslot assignment in group calls

by Mike Puchol

Hi all, I'm modifying the code to provide more information on group calls, and a more "friendly" display of a call from setup to completion. One doubt I have and can't seem to find in the Air Interface specs is how/where a particular timeslot is assigned to a particular call. For example, a call may be assigned a Usage Marker of 16, but so could a second all to a different group that takes place simultaneously. With which PDU is the TN assigned to a particular call? Best, Mike

10 years, 11 months

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[ANNOUNCE] OsmoDevCon 2013-04-04 till 2013-04-07, Berlin

by Harald Welte

Dear fellow Osmcoom developers, it is my pleasure to finally announce the date + venue of OsmoDevCon 2013: Date: April 04 through April 07, 2013 Place: IN-Berlin, Lehrter Str. 53, Berlin Like last year, this is an event for developers of the various Osmocom proejects. Reservation and confirmation of reservation is required. The event is free of charge. The Room is made available by IN-Berlin e.V., an Internet related non-profit organization. Lunch catering will be sponsored (so far by sysmocom GmbH, but if any other sponsors come up, we are happy to share the cost). So all you have to cover is your own travel + accomodation costs, as well as breakfast and dinner. If you are an active developer and cannot afford travel/accomodation, please let me know and I'll see if we can do something about it. If you would like to attend, please send a message to laforge(a)gnumonks.org applying for registration of the event. The registration deadline is March 5, i.e. one week from now. There is no detailed schedule of talks yet. I will start a separate discussion suggesting / collecting topics in the next couple of days. More information is (and will be made) available at http://openbsc.osmocom.org/trac/wiki/OsmoDevCon2013 Further discussion regarding the event should be directed at the osmocom-event-orga(a)lists.osmocom.org mailing list, to avoid cross-posting over the various project-specific lists. Best regards and happy hacking, 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)

11 years, 1 month

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wireshark

by Media

In wireshark is possible to read some another data like GSSI... So how to read data from osmo-tetra in wireshark? Could someone write some steps to do it, please. Tnx.

11 years, 2 months

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Re: tetra Digest, Vol 25, Issue 3

by Media

Jea, tnx, I know that in our country having a TEA1... But some terminal working on clear mode, so this I'm not understanding why they working on clear, but osmocom show me that we have a air encryption 1... 2013/2/15 <tetra-request(a)lists.osmocom.org>: > Send tetra mailing list submissions to > tetra(a)lists.osmocom.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.osmocom.org/mailman/listinfo/tetra > or, via email, send a message with subject or body 'help' to > tetra-request(a)lists.osmocom.org > > You can reach the person managing the list at > tetra-owner(a)lists.osmocom.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of tetra digest..." > > Today's Topics: > > 1. Air encryption: 1 (Media) > 2. Re: Air encryption: 1 (Sylvain Munaut) > > > -------------- Posredovano sporočilo -------------- > From: Media <media06(a)gmail.com> > To: tetra(a)lists.osmocom.org > Cc: > Date: Fri, 15 Feb 2013 00:31:39 +0100 > Subject: Air encryption: 1 > Here we are... one step further... :) Air encryption: 1, thisth is > means that we have encryption tetra network? TEA1 i guess... So that's > it? If is encryption 1, i can't use speech decoder for voice, right? > > Thanks. > > Regards. > > > BURST > CRC COMP: 0x1d0f OK > SB1 58/05/3/000 type1: > 001000001111001011110100000000001001001010000000000011111001 > TMB-SAP SYNC CC 000011(0x03) TN 11(3) FN 00101( 5) MN 111010(58) MCC > 0100100101(293) MNC 00000000000111(7) > TMV-UNITDATA.ind 58/05/3/000 BSCH CRC=1 SYNC > TMV-UNITDATA.ind 58/05/3/000 AACH CRC=1 ACCESS-ASSIGN > ACCESS-ASSIGN PDU: DL_USAGE: Unallocated UL_USAGE: Unallocated > CRC COMP: 0x1d0f OK > SB2 58/05/3/000 type1: > 1000111010100100001111000000110001100110100100000000000000001101100000100000000000000000101000001111111111111101110101110111 > TMV-UNITDATA.ind 58/05/3/000 UNKNOWN CRC=1 BROADCAST > BNCH SYSINFO (DL 393712500 Hz, UL 383712500 Hz), service_details 0x0d77 CCK ID 0 > Advanced link: 1 > Air encryption: 1 > SNDCP data: 1 > unknown 0x8: 0 > Circuit data: 1 > Voice service: 1 > Normal mode: 1 > Migration supported: 0 > Cell never uses minimum mode: 1 > Priority cell: 0 > De-registration mandatory: 1 > Registration mandatory: 1 > > > > > -------------- Posredovano sporočilo -------------- > From: Sylvain Munaut <246tnt(a)gmail.com> > To: Media <media06(a)gmail.com> > Cc: tetra(a)lists.osmocom.org > Date: Fri, 15 Feb 2013 00:54:06 +0100 > Subject: Re: Air encryption: 1 > Hi, > >> Here we are... one step further... :) Air encryption: 1, thisth is >> means that we have encryption tetra network? TEA1 i guess... > > It could be any of the TEA algorithm. I don't think which algorithm is > used is broadcasted, in theory each radio only supports one of the 4 > algo ... so it's assumed you bought the right radio option :p > > >> So that's >> it? If is encryption 1, i can't use speech decoder for voice, right? > > Nope. > > > Cheers, > > Sylvain > > > > _______________________________________________ > tetra mailing list > tetra(a)lists.osmocom.org > https://lists.osmocom.org/mailman/listinfo/tetra >

11 years, 2 months

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Air encryption: 1

by Media

Here we are... one step further... :) Air encryption: 1, thisth is means that we have encryption tetra network? TEA1 i guess... So that's it? If is encryption 1, i can't use speech decoder for voice, right? Thanks. Regards. BURST CRC COMP: 0x1d0f OK SB1 58/05/3/000 type1: 001000001111001011110100000000001001001010000000000011111001 TMB-SAP SYNC CC 000011(0x03) TN 11(3) FN 00101( 5) MN 111010(58) MCC 0100100101(293) MNC 00000000000111(7) TMV-UNITDATA.ind 58/05/3/000 BSCH CRC=1 SYNC TMV-UNITDATA.ind 58/05/3/000 AACH CRC=1 ACCESS-ASSIGN ACCESS-ASSIGN PDU: DL_USAGE: Unallocated UL_USAGE: Unallocated CRC COMP: 0x1d0f OK SB2 58/05/3/000 type1: 1000111010100100001111000000110001100110100100000000000000001101100000100000000000000000101000001111111111111101110101110111 TMV-UNITDATA.ind 58/05/3/000 UNKNOWN CRC=1 BROADCAST BNCH SYSINFO (DL 393712500 Hz, UL 383712500 Hz), service_details 0x0d77 CCK ID 0 Advanced link: 1 Air encryption: 1 SNDCP data: 1 unknown 0x8: 0 Circuit data: 1 Voice service: 1 Normal mode: 1 Migration supported: 0 Cell never uses minimum mode: 1 Priority cell: 0 De-registration mandatory: 1 Registration mandatory: 1

11 years, 2 months

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Anybody near of Barcelona (Spain)?

by Mario Prat

Hi all,I can't initiate osmo-tetra. I downloaded it, but...must I compile it? Any member near of Barcelona? my mail is marioprat2001 @ gmail. com Thank you

11 years, 2 months

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TETRA test samples

by Dieter Spaar

Hello, there is now a test sample (bit file) with speech at http://tetra.osmocom.org/trac/wiki/Test_Samples Please only add samples to this page if you have the full agreement for publishing from all involved parties (e.g. operator of the network, people speaking during the capture). This is not the place to share captures which were made from someone else without their knowledge. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

11 years, 2 months

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CentOS

by Pepijn van den Berkhof

Is there anyone who has this running on CentOS? Is it possible? Regards, Pepijn

11 years, 3 months

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decrypt voice traffic

by Media

Is there someone who is succeeded decrypt voice traffic?

11 years, 4 months

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Osmocom TETRA software

by Ari Kaspari

Hello, i found your brilliant project yesterday and asked me, if it is possible to use a signal from a radioscanner discriminator output for your omso-tetra tool. In your Picture http://tetra.osmocom.org/trac/graphviz/caf863214dab2ac9e1beead8b122318020ec… it seems to me, that I only need PCM Samples from my radioscanner. Thus I think i can stream the discriminator output via soundcard (PCM-Samples) into a linux pipe and use this pipe for your omso-tetra tool. Is this possible? Or is my radioscanner not possible to "stream" the correct channel pattern? Best Regards Ari Kaspari

11 years, 4 months

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Question again without error in email

by Ari Kaspari

Hi thank you for your comment. What do you think about the following thought: I take two old radioscanners each has 12.5 kHz channel pattern ("Kanalraster") , Tetra uses 25 kHz. Then I make for each scanner a FM modulation in Software or on FPGA and after a signal addition. Now i should have the modulated Pi/4-DQPSK signal back. Or haven’t I?

11 years, 4 months

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TETRA-RX on AR5000

by fe8769

hello I can't understand why tetra-rx won't work with my configuration : AR5000 -->output 10.7 Mhz -->DJX11 in IQ mode then sound card I have a nice graph as same as using DJX11 but no decode This previous configuration is working with standard windows SDR software with DMRdecode any idea thanks --

11 years, 4 months

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Fix some uglyness

by Frank A. Stevenson

Attached is a patch that fixes some global ugliness. The dependencies are a bit iffy, so you need a make clean after applying this. This fix needs to be in place before you decode multiple carriers. I would like to suggest that tetra-rx.c be changed so that it can receive multiplexed streams of input. Byte values of 0 / 1 will be the primary stream, but other values can be used to encode the multiplexed streams. The easiest method is to use the high order bits of the input as a "stream id", and dynamically create new state structs as they appear in the stream. Does this sound like a decent solution ? f

11 years, 4 months

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Bounce action notification

by mailman＠lists.osmocom.org

This is a Mailman mailing list bounce action notice: List: tetra Member: jasperkanbier(a)wanadoo.nl Action: Subscription disabled. Reason: Excessive or fatal bounces. The triggering bounce notice is attached below. Questions? Contact the Mailman site administrator at mailman(a)lists.osmocom.org.

11 years, 5 months

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osmotetra java port

by Jack

Hello, I just started to write a java port of osmotetra and I wonder if there is some people interested who can help me to debug, clean and make documentation (javadoc format) for this code. I want to write a java implementation of codec too, but I don't know if I can distribute the code or if its license forbids it, can you tell me about this? Thanks. Jesús M. Tormo.

11 years, 5 months

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Decoding multiple carriers

by Frank A. Stevenson

I have gotten some code working now to a proof of concept level. What it does is: A) Capture 2 MHz of spectrum to fifo (1) (gnuradio-companion) B) Frequency shift, filter and decimate fifo(1) -> fifo(2) using GPU C) Demodulate fifo (2) into bits to fifo(3) using my own "dodgy demodulator" D) Running tetra-rx from fifo(3) - for display in wireshark This runs realtime at around 30% CPU load (for a single core) and 30% GPU load on an ATI 5850 card. So I can easily add more carriers to tetra-rx (I have 2 such GPUs), but tetra-rx doesn't seem well prepared for handling such situations, for instance the GSMTAP packets are not tagged by ARFCN - besides I don't have a good understanding of what others would want to do when demodulating multiple carriers. Personally I have to limit myself to traffic analysis on a fully encrypted network. Are there any plans for how to progress tetra-rx that I can follow, or should I just rip the thing apart and make it do what I want it to do ? f

11 years, 5 months

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Strange offset in float_to_bits.c

by Frank A. Stevenson

I made this change: diff --git a/src/float_to_bits.c b/src/float_to_bits.c index 08fad54..4547ffe 100644 --- a/src/float_to_bits.c +++ b/src/float_to_bits.c @@ -113,7 +113,7 @@ int main(int argc, char **argv) exit(1); } else if (rc == 0) break; - rc = process_sym_fl(0.3f, fl); + rc = process_sym_fl(0.0f, fl); sym_int2bits(rc, bits); //printf("%2d %1u %1u %f\n", rc, bits[0], bits[1], fl); if (opt_verbose) Which improved decoding rate on correctly tuned captures. I think this 0.3 offset is an oversight that will generally increase BER. In other news, I have gotten my own GPU (openCL) assisted demodulator working, I am thinking about decoding multiple carriers concurrently with this code, but I think the gnu_radio demodulator has an edge with regards to BER, especially if the offset is set to 0.0f :-) Cheers, Frank

11 years, 5 months

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[PATCH] Add missing if braces in decode_chan_alloc

by Gregor

Took me longer then it should to find it.

11 years, 6 months

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[PATCH] Add missing if braces in decode_chan_alloc

by Gregor Gregoric

--- src/tetra_mac_pdu.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/src/tetra_mac_pdu.c b/src/tetra_mac_pdu.c index 882a0e7..70b5ec9 100644 --- a/src/tetra_mac_pdu.c +++ b/src/tetra_mac_pdu.c @@ -93,8 +93,10 @@ static int decode_chan_alloc(struct tetra_chan_alloc_decoded *cad, const uint8_t cad->ext_carr.reverse_oper = bits_to_uint(cur, 1); cur += 1; } cad->monit_pattern = bits_to_uint(cur, 2); cur += 2; - if (cad->monit_pattern == 0) - cad->monit_patt_f18 = bits_to_uint(cur, 2); cur += 2; + if (cad->monit_pattern == 0) { + cad->monit_patt_f18 = bits_to_uint(cur, 2); + cur += 2; + } if (cad->ul_dl == 0) { cad->aug.ul_dl_ass = bits_to_uint(cur, 2); cur += 2; cad->aug.bandwidth = bits_to_uint(cur, 3); cur += 3; -- 1.7.4.1 --========GMX151621349116554584744--

11 years, 6 months

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Audio decoding

by Javier Coso

Hi, I´m using the mod for getting the audio into ".out" files. It seems to work fine but many times the audio goes to the "16777215" file, when it should go to a real ssi file, so part of the audio is into the correct ssi_file and the other part is into the "16777215" file. It is horrible to try to listen the audio!!! Is it only my problem? Is the same to you? Regards, -- Javier Coso

11 years, 7 months

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speech codec - voice signal?

by Media

Hey guys, i wondering if has anyone complete the speech codec for listen to the voice signal? Is this working? Because i don't find working code to do this... Regards.

11 years, 8 months

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wrong decim with fcd device / osmosdr-tetra_demod_fft.py

by Stefan Mandl

Hello, using a FUNcube dongle, the first_decim rate is to high. regards Stefan My patch --- a/src/demod/python/osmosdr-tetra_demod_fft.py +++ b/src/demod/python/osmosdr-tetra_demod_fft.py @@ -61,8 +61,11 @@ class top_block(grc_wxgui.top_block_gui): out_sample_rate = symbol_rate * sps options.low_pass = options.low_pass / 2.0 - - first_decim = 10 + + if sample_rate == 96000: + first_decim = 2 + else: + first_decim = 10 self.offset = 0

11 years, 9 months

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code-linking

by Graham Palmer

Hi all Can anyone give me any ideas how to link the traffic.data to the channel decoder (ETSI) in real time to enable a continuous real time decoder from demod to audio. Many thanks and best regards. Graham p.

11 years, 9 months

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code-linking

by Graham Palmer

Hi all. Can anyone give me an idea how to link the traffic.data to the channel decoder (ETSI) in real-time to make a continuous real time decoder. Many thanks and best regards. Graham p.

11 years, 9 months

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Address/Usage Marker decoding patch

by Ronny Kunze

Hello, here is a small patch for the address and usage marker decoding. There is a wrong offset for the usage marker used. Ronny

11 years, 9 months

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control and listen tetra unencrypted network

by Media

hi all, I would like to know, if someone tested the network in ex-jugo states (like is Slovenia)? In our country use no encrypted network (clear, no TEA encrypted)... So, i wonder if is possible with osmcom project to listen (real time) to tetra groups? If is possible to do this with DVB-T reciver, like this: http://www.youtube.com/watch?v=Z0hEquzLsWU product: https://www.cosycave.co.uk/product.php?id_product=220 This means that you can monitoring all tetra network, but not for voice,because i need a voice decoder? Thanks for help and answers.

11 years, 9 months

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Nokia TETRA device configuration ?

by Dieter Spaar

Hello, does anyone here has experience with the configuration of some older Nokia TETRA devices like the TMR420, HRU420 or THR850 ? The manufacturer does no longer support them so there seems to be no official way to get the required information. If you can help, please contact me privately. Thanks and best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

11 years, 9 months

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enquiry

by Graham Palmer

Hi all Just a quick enquiry. Anybody know how to pipe traffic.out data to channel decoder ? I can only get it to copy 1 frame with mkfifo and then it stops. All other pipes work right up to aplay audio. Any help is appreciated. Many thanks. Graham.

11 years, 10 months

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USRP more than one channel demod

by Martin de Wendt

Hello. Has anyone an idea how to demodulate more than one channel per time while using an USRP or FCD? The provided bandwidth is big enough. But how the split the 25kHz channels into seperate streams? Any idea is welcome. Thx Martin

11 years, 10 months

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Urgent - CQPSK Modulation - Issue with DQPSK Modulation

by Vahid Behzadan

Hi, I am currently trying to implement a modulator/demodulator for TETRA using pi/4 DQPSK. I tried to use cqpsk.py which was provided with this package, but apparently some functions such as psk.constellation[] are not available in the new version of gnuradio. I created a list of constellation points to be used by chunks_to_symbols_bc() function, and I think this has solved this issue. I have another issue: when I modulate a string of bits in a file, and then demodulate it, the output contains 10 zeros and then a few numbers between 0 to 255 which does not seem to be related to the input bit stream at all. Could anyone please advise me on the matter? I am using GNURadio3.6.0, and main bits of code are attached: Regards, Vahid CQPSK.py cqpsk_mod() modification: ... self.pi4map = [1, 3, 7, 5] self.constel = [1+0j,0.7+0.7j,0+1j,-0.7+07j,-1+0j,-0.7-0.7j,0-1j,0.7-0.7j] self.symbol_mapper = gr.map_bb(self.pi4map) self.diffenc = gr.diff_encoder_bb(arity) self.chunks2symbols = gr.chunks_to_symbols_bc(self.constel) ... ------------------------------------------------------------------- Modulator: sample_rate = options.sample_rate symbol_rate = 18000 sps = 2 IN = gr.file_source(gr.sizeof_char, options.input_file, repeat = False) #IN = (1,0,0,0,1,1,0,0) #src = gr.vector_source_b (IN) MOD = cqpsk.cqpsk_mod( samples_per_symbol = sps, excess_bw=0.35, log=options.log, verbose=options.verbose) OUT = gr.file_sink(gr.sizeof_gr_complex, options.output_file) # r = float(sample_rate) / float(new_sample_rate) # INTERPOLATOR = gr.fractional_interpolator_cc(0, r) self.connect(IN, MOD, OUT) --------------------------------------------------------------- Demodulator: sample_rate = options.sample_rate symbol_rate = 18000 sps = 2 # output rate will be 36,000 ntaps = 11 * sps new_sample_rate = symbol_rate * sps channel_taps = gr.firdes.low_pass(1.0, sample_rate, options.low_pass, options.low_pass * 0.1, gr.firdes.WIN_HANN) FILTER = gr.freq_xlating_fir_filter_ccf(1, channel_taps, options.calibration, sample_rate) sys.stderr.write("sample rate: %d\n" %(sample_rate)) IN = gr.file_source(gr.sizeof_gr_complex, options.input_file, repeat = False) DEMOD = cqpsk.cqpsk_demod( samples_per_symbol = sps, excess_bw=0.35, costas_alpha=0.03, gain_mu=0.05, mu=0.05, omega_relative_limit=0.05, log=options.log, verbose=options.verbose) self.convert = gr.float_to_char() self.convert2 = gr.float_to_char() OUT = gr.file_sink(gr.sizeof_char, options.output_file) self.sink1 = gr.vector_sink_b() r = float(sample_rate) / float(new_sample_rate) INTERPOLATOR = gr.fractional_interpolator_cc(0, r) self.connect(IN, FILTER, INTERPOLATOR, DEMOD, self.convert, OUT) self.connect (DEMOD,self.convert2,self.sink1) def print_data(self): print "data in sink1 is: ",self.sink1.data() ---------------

11 years, 10 months

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issues with GNURadio 3.6.1 ?

by sinager＠tarapippo.net

Hi, are you aware of problems with that? >>> gr_fir_ccc: using 3DNow!Extsample rate: 1024000Using Volk machine: sse3_32>>> gr_fir_ccf: using 3DNow!Traceback (most recent call last): File "./src/demod/python/tetra-demod.py", line 67, in <module> my_top_block().run() File "./src/demod/python/tetra-demod.py", line 54, in __init__ verbose=options.verbose) File "/home/sinager/osmo-tetra/src/demod/python/cqpsk.py", line 266, in __init__ self.receiver=gr.mpsk_receiver_cc(arity, pi/4.0,AttributeError: 'module' object has no attribute 'mpsk_receiver_cc' Works fine with 3.6.0 on myu netbook so I'm not sure if it's a release issue or I simply have something screwed on the main pc.Cheers S

11 years, 11 months

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April 25, 7pm / Regular Osmocom meeting in Berlin?

by Harald Welte

Hi all! This is the announcement for the 2nd incarnation of our bi-weekly Osmocom Berlin meeting. April 25, 7pm @ CCC Berlin, Marienstr. 11, 10113 Berlin The schedule is as follows: 19:00 Introduction into the TETRA base station located @ CCCB For quite some time, there is a full TETRA base station located in the Berlin CCC, consisting of two base radios (BR), a site controller (TSC), an auto-tuning cavity combiner and other equipment. The talk will introduce the architecture of the system and the current status of getting it running. 20:00 Presenting the CC32RS512 / towards an Osmocom Card OS The CC32RS512 is a flash-based smart card controller to which the documentation is available without NDA. This means that we finally are able to implement a Smart Card OS (COS) as free software. 20:30 Informal discussions If you are interested to show up, feel free to do so. There is no registration required. If the initial part is not interesting to you, feel free to join us later at 20:30. The meeting is free as in "free beer", despite no actual free beer being around ;) 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)

12 years

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please help

by Hannu Hiltunen

has anybody succesfully get rtl chipset working? i tried it with every tetra signal and it always says cannot "find suggestive training sequence" approx 1 sec interval signal levels are good.tried with many different amp/antenna compination. and changed filter settings but no change.and with rtl-sdr it seems that it doesent change gain at all.

12 years

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rtl-sdr+tetra

by Hannu Hiltunen

i can demodulate tetra good but minimum samplerate i can do is 1msps at 3ghz double core cpu is 100% in use.so i want to demodulate it with lower value. when i try lower value example 192ksps it doesent work.so im asking any workarounds?im using noxon dab/dab+"fc00013" is it rtl chip that cannot do under 1msps?and on gnuradio under 1msps fft is very slow but 1+ its normal.

12 years

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FCD Windows hangs

by Pepijn van den Berkhof

Hi All, Today I tried reinstalling the script again, it has worked before but I've changed PC's. Upon running the fcdp-tetra_demod_fft.py file the spectrum windows opens normally but after a few seconds the spectrum line stops moving. Do you guys have any idea what is causing this? I have tried reinstalling everything, gnuradio, libtools and even Ubuntu... But no success..:( Thanks! -Pepijn

12 years, 1 month

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Help tetra-rx error while loading shared libraries: libosmocore.so.4:

by Jean-Marc Dhainaut

Hello, tgis is my problem after download and install libosmore by git and install it ( no soucy) i go to osmo-tetra/src I do a make, for compile tetra-rx etc ... ok, no soucy i make a "tmp" directory i make the two fifo mkfifo ./tmp/out.float mkfifo ./tmp/out.bit Ok, no soucy for the moment I have a funcube and i'm launching with these commands ./osmo-tetra/src/demod/python/fcdp-tetra_demod_fft.py -D hw:1,0 -o ./tmp/out.float -L12500 | ./osmo-tetra/src/float_to_bits ./tmp/out.float ./tmp/out.bits | ./osmo-tetra/src/tetra-rx ./tmp/out.bits Ok the program Osmo-Tetra FCDP"is running but i have an error msg from tetra-rx ./osmo-tetra/src/tetra-rx: error while loading shared libraries: libosmocore.so.4: cannot open shared object file: No such file or directory" What is the problem ? i think the librairies are correctly installed These are the terminal return message ./osmo-tetra/src/demod/python/fcdp-tetra_demod_fft.py -D hw:1,0 -o ./tmp/out.float -L12500 | ./osmo-tetra/src/float_to_bits ./tmp/out.float ./tmp/out.bits | ./osmo-tetra/src/tetra-rx ./tmp/out.bits ./osmo-tetra/src/tetra-rx: error while loading shared libraries: libosmocore.so.4: cannot open shared object file: No such file or directory >>> gr_fir_ccc: using 3DNow!Ext sample rate: 96000 >>> gr_fir_ccf: using 3DNow! Thank for your help

12 years, 1 month

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is tetra encryption is broken

by Akib Sayyed

Can anyone will put some focus on Tetra Encryption is any1 have tetra encryptions details and there key length etc did any1 ever done cryptanalysis on it ?? also whats the current status of osmoTetra are we able to hear no encryption traffic of tetra?? or some modification is still needed ?? where we can find details of tetra specs?? please consider me as very noooooob in Tetra -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

12 years, 2 months

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