Hi,

Thank for this files, works great, i have the same results as you sent!

But i yet cant understood with value of sync after demodulation, why is it "1, 0, 1, 0, 0, 1, 1" (7-bit)?

I look in standard PAS 0001-2 6.1.5.2 (voice) and PAS 0001-2 6.2.5.2 (data) and there 8-bit sync with value 0, 1, 1, 0, 0, 0, 1, 0.

From previous question about IDE, now using QT, very user friendly, attach Makefile and go)

P.S. Would be very useful if somebody have files with voice, interesting compare.

Regards,

Evgenii

2017-03-11 12:04 GMT+02:00 <tetrapol-kit-request@brmlab.cz>:
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Today's Topics:

   1. app/tetrapol_dump (Evgenii Royzman)
   2. Re: app/tetrapol_dump (JS)


----------------------------------------------------------------------

Message: 1
Date: Thu, 9 Mar 2017 11:56:57 +0200
From: Evgenii Royzman <dzhudzhan@gmail.com>
To: tetrapol-kit@brmlab.cz
Subject: [Tetrapol-kit] app/tetrapol_dump
Message-ID:
        <CAEixV-L5VTbxktfQz3Au7fmbrm-5mesznTq64uu7zL9TsV4v8w@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi guys!

You did really cool work with tpol.

I'm also trying something with this one and you results is absolutely find
for my!

I have already demodulated signal and would decode it with your
app/tetrapol_dump, is it real or i have to use binary only after your demod?

Regards,

Evgenii
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Message: 2
Date: Sat, 11 Mar 2017 10:57:50 +0100
From: JS <jiri.svoboda@yandex.com>
To: Evgenii Royzman <dzhudzhan@gmail.com>, TETRAPOL-kit
        <tetrapol-kit@brmlab.cz>
Subject: Re: [Tetrapol-kit] app/tetrapol_dump
Message-ID: <20170311105750.10c81a36@p-brm>
Content-Type: text/plain; charset="utf-8"

Hi,

please keep mailinglist in cc, for others to find out.


in tetrapol_dump is implemented SCR detector. It tries all 128 possible
values and finds out wich one works. By design SCR is system constant
for controll channels (CCH) and for transport channels (TCH) is
broadcasted on CCH.

I have attached small file with demodulated data and example outputs,
hope this help a bit. It is CCH with system_info and few other messages.

With best regards,
        JS


On Fri, 10 Mar 2017 10:22:52 +0200
Evgenii Royzman <dzhudzhan@gmail.com> wrote:

> Hi,
>
> Very sad.
>
> But in plan I want to realize it and ready for reverse.
>
> Yet have several question:
>
> 1. do you have records with known parameters.
>
> This need me for debug my decoder subsystem.
> I use the same sequence (descrambling, diffdec(UHF, VHF),
> deinterleaving(UHF, VHF), ch.decoding (based on Viterbi described in
> https://www.amazon.com/Digital-Communications-Fundamentals-Applications-2nd/dp/0130847887),
> crc, descr), but unknown parameters of my records confusing me,
> especially metrics after Viterbi (no zero values for every SCR
> [0,127]).
>
> 2. can i get bitstream  from your system after ch.decoder by tee,
> cose i use something like "./tetrapol_dump -i /myPath/1.bin -b UHF -t
> TCH -d DOWN | tee /myPath/output.bin" and in result have only part of
> terminal info after "Exiting."(you can see it in previous attaches).
> Or even better get bitstream from different parts, after
> deinterleaving for example.
> Or is this real only after change source code and recompile it? If
> true, back to question from previous letter about IDE (i think about
> Eclipse CDT with switch to your makefile).
>
> Will be thank for any feedback.
>
> Regards,
>
> Evgenii
>
> 2017-03-09 18:36 GMT+02:00 JS <jiri.svoboda@yandex.com>:
>
> > vocoder is not producing anithing listenable, need a lot of work
> > (and a bit of reverseingeneering).
> >
> > JS
> >
> >
> > On Thu, 9 Mar 2017 17:39:46 +0200
> > Evgenii Royzman <dzhudzhan@gmail.com> wrote:
> >
> > > Hi,
> > >
> > > Thank for advice, now I can see some results during decoding and
> > > some tee. Will try vocoder.
> > >
> > > P.S. If you interesting in attach examples of my tests.
> > >
> > > Regards,
> > >
> > > Evgenii
> > >
> > > 2017-03-09 14:40 GMT+02:00 Evgenii Royzman <dzhudzhan@gmail.com>:
> > >
> > > > Sorry sent press Send instead attach)
> > > >
> > > > One more file in attach.
> > > >
> > > > I also wanted to know what IDE you use to debug your project,
> > > > and maybe you have some example of records  I/Q or binary after
> > > > demodulation with known parameters (SCR, -b, -t, -d) I would be
> > > > very pleasure!
> > > >
> > > > I try my own system in java and this sources very imported for
> > > > me.
> > > >
> > > > P.S. attached records from
> > > > http://www.sigidwiki.com/wiki/Tetrapol
> > > >
> > > > Sorry for separate letters)
> > > >
> > > > Regards,
> > > >
> > > > Evgenii
> > > >
> > > >
> > > > 2017-03-09 14:29 GMT+02:00 Evgenii Royzman
> > > > <dzhudzhan@gmail.com>:
> > > >> HI, thank for quick response!
> > > >>
> > > >> As I understood, tetrapol_detector.sh set parameters for
> > > >> receive signal from air via sdr and demodulate it. My binary
> > > >> file already demodulated by another demodulator (file in
> > > >> attach).
> > > >>
> > > >> My question about, can I decode my record with you decoder
> > > >> (tetrapol_dump) and which extension, reverse, invert e.t.c? Or
> > > >> I anyway need to install tetrapol_detector.sh?
> > > >>
> > > >> I have tried to use command like: "./tetrapol_dump
> > > >> -i /myPath/1.bin -b UHF(and VHF) -t TCH(and CCH ) -d DOWN(and
> > > >> UP) | tee /myPath/output.bin" but at once had "Exiting." on
> > > >> next line with no any info in terminal and zero output.bin.
> > > >>
> > > >> 2017-03-09 13:33 GMT+02:00 JS <jiri.svoboda@yandex.com>:
> > > >>
> > > >>> Hi,
> > > >>>
> > > >>> after demodulation you should use tetrapol_dump. I suggest
> > > >>> you to study tetrapol_detector.sh which shows what tools are
> > > >>> used and what they do.
> > > >>>
> > > >>> With best regards,
> > > >>>         JS
> > > >>>
> > > >>> On Thu, 9 Mar 2017 12:21:10 +0200
> > > >>> Evgenii Royzman <dzhudzhan@gmail.com> wrote:
> > > >>>
> > > >>> > Hi guys!
> > > >>> >
> > > >>> > You did really cool work with tpol.
> > > >>> >
> > > >>> > I'm also trying something with this one and you results is
> > > >>> > absolutely find for my!
> > > >>> >
> > > >>> > I have already demodulated signal and would decode it with
> > > >>> > your app/tetrapol_dump, is it real or i have to use binary
> > > >>> > only after your demod?
> > > >>> >
> > > >>> > Regards,
> > > >>> >
> > > >>> > Evgenii
> > > >>>
> > > >>>
> > > >>>
> > > >>
> > > >
> >
> >
> >


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