Tetrapol-kit February 2017

tetrapol-kit@brmlab.cz

2 discussions

Bit ranking in voice frame
by Xilokar 08 Jan '18

08 Jan '18

Hi, I was wondering how the bit positions in voice frames were found (I am talking of voice_frame.py in rp-celp repo) I can not find the info in PAS 0001-7: Version 1.0.3 (so much for a specification...) I am trying to decode Q & ph for each subframe in order to feed the excitation signal in the filters, but there seems to be some incoherency either with my own received frames (that I was not able to test) or with the voice_tones sample from the transmit repo. Regards, Xilokar

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Re: [Tetrapol-kit] Help tu use tetrapol kit
by Jan Hrach 04 Mar '17

04 Mar '17

You did not run make as is described in the README? On 13.4.2016 11:06, Atariman(a)laposte.net wrote: > The problem is i dont't have the file tetrapol_dump. I think i must to compile the files in the app folder but how can i do ? > > > > ---- Jan Hrach a écrit ---- > > You don't have tetrapol_dump in PATH. Either add it there or use full path. > >> Scan with scan.hs <http://scan.hs> ? > No, just use your favourite SDR tool, e.g. gqrx. > >> Finally, if i haven't got tetrapol station connected ( TPH 700 or 900 or other ) i can't decode audio. Correct ? > Correct. > And usually you can't decode even if you have a station, because it's just encrypted. > >> If i understand, the RP-ACELP codecs will be available later, and it will not be necessary to have external station for decoding the voice ? > We hope so. > > On 9.4.2016 20:33, atariman(a)laposte.net <mailto:atariman@laposte.net> wrote: >> if i do : >> ./demod.py <http://demod.py> -c 2882 -p 44 -g 40 -O "tetrapol_dump -t TCH" >> >> Returning : >> Using Volk machine: avx_64_mmx_orc >> /bin/sh: 1: tetrapol_dump: not found >> file_descriptor_sink: Bad file descriptor >> >> Tetrapol_dump not found, what is the problem ? >> >> "Scan for Tetrapol traffic. It is 12.5kHz wide buzzing (when demodulated as FM) usually in the 380-420 <tel:380-420>MHz band." >> Scan with scan.hs <http://scan.hs> ? There is no example or information to use the file scan.sh <http://scan.sh> in the demod folder >> >> "Compute the ARFCN of your station. We believe it is (f-358399864)/12500. E.g. a station at 394425 <tel:394425> kHz is channel number 2882." >> >> Finally, if i haven't got tetrapol station connected ( TPH 700 or 900 or other ) i can't decode audio. Correct ? >> >> If i understand, the RP-ACELP codecs will be available later, and it will not be necessary to have external station for decoding the voice ? >> >> The project is young, and good luck, it's very interesting to decode tetrapol >> >> >> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ >> *De: *"Jan Hrach" <jenda(a)yakumo.hrach.eu <mailto:jenda@yakumo.hrach.eu>> >> *À: *atariman(a)laposte.net <mailto:atariman@laposte.net>, tetrapol-kit(a)brmlab.cz <mailto:tetrapol-kit@brmlab.cz> >> *Envoyé: *Samedi 9 Avril 2016 19:59:40 >> *Objet: *Re: [Tetrapol-kit] Help tu use tetrapol kit >> >>> I think now the RP_CELP codec are available >> No, that is some basic version that does not produce intelligible audio. >> If you happen to see an unencrypted network, you can try to decode some audio via our web service (currently offline). >> >>> I need to compile it ? How ? cmake ? and how to use it ? >> I think everything needed is in https://brmlab.cz/project/sdr/tetrapol/howto >> >> On 9.4.2016 18:00, atariman(a)laposte.net <mailto:atariman@laposte.net> wrote: >>> And for information. I don't have the file tetrapol_dump in the APP FOLDER. >>> >>> Just : >>> tetrapol_dump.c >>> cmakelist.txt <http://cmakelist.txt> >>> tetrapol_build.c >>> >>> I need to compile it ? How ? cmake ? and how to use it ? >>> >>> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ >>> *De: *"Jan Hrach" <jenda(a)yakumo.hrach.eu <mailto:jenda@yakumo.hrach.eu>> >>> *À: *atariman(a)laposte.net <mailto:atariman@laposte.net>, tetrapol-kit(a)brmlab.cz <mailto:tetrapol-kit@brmlab.cz> >>> *Envoyé: *Samedi 9 Avril 2016 17:28:36 >>> *Objet: *Re: [Tetrapol-kit] Help tu use tetrapol kit >>> >>>> And a lot of files in TMP FOLDER are available >>>> examples : >>>> cch_392045910.json <http://392045910.json> >>>> channel392045910.bits <http://channel392045910.bits> >>> >>> Well, if they contain reasonably-looking information, then you have a working receiver! >>> >>>> how to use the kit for listening ? >>> >>> https://brmlab.cz/project/sdr/tetrapol/audio >>> >>>> If i lauch ./sysop_env.sh <http://env.sh> i think there is an error of missing .cfile >>> >>> This seems to expect a pre-recorded cfile... But it does not matter, as your receiver seem to work. >>> >>> On 9.4.2016 13:17, atariman(a)laposte.net <mailto:atariman@laposte.net> wrote: >>>> Hello, i leave in France with tetrapol trames available. All install is ok. I use RTL key SDR. >>>> >>>> I made a TMP folder in the DEMOD directory >>>> >>>> I launch ./tetrapol_detector.sh <http://detector.sh> >>>> I return : >>>> sample rate: 2400000 <tel:2400000> >>>> decim: 150 >>>> output sample rate: 16000 <tel:16000> >>>> samples per symbol: 2 >>>> channel[0]: -1 frequency=393515515, offset=734217 Hz >>>> Using Volk machine: avx_64_mmx_orc >>>> channel[1]: -1 frequency=392047081, offset=-734217 Hz >>>> channel[2]: -1 frequency=392946409, offset=165111 Hz >>>> channel[3]: -1 frequency=393325813, offset=544515 Hz >>>> channel[4]: -1 frequency=392826967, offset=45669 Hz >>>> channel[5]: -1 frequency=393206371, offset=425073 Hz >>>> channel[6]: -1 frequency=392256690, offset=-524608 Hz >>>> channel[7]: -1 frequency=393396073, offset=614775 Hz >>>> >>>> Freq 393515515 <tel:393515515> freq err: 2001 freq: 734617.261646 <tel:734617.261646> >>>> Freq 392047081 <tel:392047081> freq err: 366 freq: -734143.850073 >>>> Freq 392946409 <tel:392946409> freq err: 994 freq: 165309.823303 <tel:165309.823303> >>>> Freq 393325813 <tel:393325813> freq err: 1613 freq: 544837.590405 <tel:544837.590405> >>>> Freq 392826967 <tel:392826967> freq err: 360 freq: 45740.961414 <tel:45740.961414> >>>> Freq 393206371 <tel:393206371> freq err: 843 freq: 425241.643213 <tel:425241.643213> >>>> Freq 392256690 <tel:392256690> freq err: 581 freq: -524491.716589 >>>> Freq 393396073 <tel:393396073> freq err: 1311 freq: 615037.154883 <tel:615037.154883> >>>> >>>> Freq 393515515 <tel:393515515> freq err: 1962 freq: 735009.723584 <tel:735009.723584> >>>> Freq 392047081 <tel:392047081> freq err: 358 freq: -734072.181348 >>>> Freq 392946409 <tel:392946409> freq err: 977 freq: 165505.293518 <tel:165505.293518> >>>> Freq 393325813 <tel:393325813> freq err: 1585 freq: 545154.581641 <tel:545154.581641> >>>> Freq 392826967 <tel:392826967> freq err: 460 freq: 45832.910699 <tel:45832.910699> >>>> Freq 393206371 <tel:393206371> freq err: 823 freq: 425406.229443 <tel:425406.229443> >>>> Freq 392256690 <tel:392256690> freq err: 573 freq: -524377.189514 >>>> Freq 393396073 <tel:393396073> freq err: 1402 freq: 615317.472778 <tel:615317.472778> >>>> >>>> Freq 393515515 <tel:393515515> freq err: 1558 freq: 735321.261206 <tel:735321.261206> >>>> Freq 392047081 <tel:392047081> freq err: 292 freq: -734013.718341 >>>> Freq 392946409 <tel:392946409> freq err: 777 freq: 165660.597095 <tel:165660.597095> >>>> Freq 393325813 <tel:393325813> freq err: 1259 freq: 545406.324341 <tel:545406.324341> >>>> Freq 392826967 <tel:392826967> freq err: 237 freq: 45880.384836 <tel:45880.384836> >>>> Freq 393206371 <tel:393206371> freq err: 657 freq: 425537.629602 <tel:425537.629602> >>>> Freq 392256690 <tel:392256690> freq err: 458 freq: -524285.634351 >>>> Freq 393396073 <tel:393396073> freq err: 1135 freq: 615544.542529 <tel:615544.542529> >>>> >>>> >>>> And a lot of files in TMP FOLDER are available >>>> examples : >>>> cch_392045910.json <http://392045910.json> >>>> channel392045910.bits <http://channel392045910.bits> >>>> >>>> etc ... >>>> >>>> And now ? What can i do ? how to use the kit for listening ? >>>> >>>> If i lauch ./sysop_env.sh <http://env.sh> i think there is an error of missing .cfile >>>> >>>> gr-osmosdr v0.1.4-72-g164a09fc (0.1.5 <tel:0.1.5>git) gnuradio 3.7.9.1 <http://3.7.9.1> >>>> built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace airspy redpitaya >>>> data/391.cfile <http://391.cfile>: No such file or directory >>>> >>>> FATAL: can't open file >>>> >>>> Trying to fill up 1 missing channel(s) with null source(s). >>>> This is being done to prevent the application from crashing >>>> due to gnuradio bug #528. >>>> >>>> sample rate: 0 >>>> decim: 125 >>>> output sample rate: 0 >>>> samples per symbol: 0 >>>> Traceback (most recent call last): >>>> File "./demod/demod.py <http://demod.py>", line 166, in <module> >>>> tb = top_block() >>>> File "./demod/demod.py <http://demod.py>", line 78, in __init__ >>>> raise ValueError('Output name template missing "%%".') >>>> ValueError: Output name template missing "%%". >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Tetrapol-kit mailing list >>>> Tetrapol-kit(a)brmlab.cz <mailto:Tetrapol-kit@brmlab.cz> >>>> https://brmlab.cz/cgi-bin/mailman/listinfo/tetrapol-kit >>>> >>> >>> >>> -- >>> Jan Hrach | http://jenda.hrach.eu/ >>> GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282 <tel:6527 282>E >>> >> >> >> -- >> Jan Hrach | http://jenda.hrach.eu/ >> GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282 <tel:6527 282>E >> > > > -- > Jan Hrach | http://jenda.hrach.eu/ > GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282 <tel:6527 282>E -- Jan Hrach | http://jenda.hrach.eu/ GPG CD98 5440 4372 0C6D 164D A24D F019 2F8E 6527 282E

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Tetrapol-kit February 2017