Hi!
I have uploaded a number of tetra data files to a password-protected rsync repository:
you can access it using "rsync -azv tetra@osmocom.org::tetra/data ." using the password "Xo4ried5" (please use -z option to compress the transmission, as the files in the repo are uncompressed)
*.cfile raw complex samples recordings, need tetra_demod.py *.float output files of demodulator, 1 float per symbol *.bits output of float_to_bits (1 bit-per-byte format)
If you want to contribute traces, feel free to upload them, preferrably both the cfile and the bits... there's no need for the .float files.
please create one new directory for every trace or class of traces you upload. A small README file is appreciated in order to explain what those traces are.
Due to the sensitive nature of the data, pleaes keep access to the repository private. Thanks for your understanding.
btw: The entire project is not released yet. While I have made it public that we're working on TETRA, I would not want the current code released - last but not least since we're using a viterbi implementation that is under unclear license terms as it is derived from the ACELP refernence codec.
Once somebody has replaced the viterbi with a new implementation and we have cleaned up the code, I don't really see why we would not release it publicly.
Regards, Harald
Hi,
just uploaded a new set of 9 carriers collected yesterday. In case someone is interested in the whole .cfile (940 Mb) or a specific carrier - please indicate.
Regards,
Dimitri
Hello Dimitri,
On Sun, 09 Jan 2011 19:47:11 +0100, "Dimitri" horiz0n@gmx.net wrote:
just uploaded a new set of 9 carriers collected yesterday. In case someone is interested in the whole .cfile (940 Mb) or a specific carrier - please indicate.
Your samples are really nice ;-)
Appended is what you can hear in one of them.
I have done some initial experiments to decode unencrypted speech traffic, Harald is thinking about how this could be cleaned up and implemented in a proper way, so this should be released soon.
Best regards, Dieter
Dieter Spaar, Germany spaar@mirider.augusta.de
Hi Dieter,
Your samples are really nice ;-)
I am quite impressed by the actual robustness of the cqpsk demodulator from the APCO package, as i did not made any effort in finding the right parameters for the given signals etc. and it seems to work just fine.
and implemented in a proper way, so this should be released soon.
Also the fast progress with the voice decoding is awesome! Looking forward to be able to test a preliminary implementation... :)
Appended is what you can hear in one of them.
Unfortunately at least one of them is speaking a heavy local dialect - so i can barely understand a word ;).
Best Regards,
Dimitri