This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/osmocom-sdr@lists.osmocom.org/.
friedtj friedtj at free.frI have just uploaded to http://jmfriedt.free.fr/gr-acars.tar.gz the first version of the ACARS message decoder I have written for gnuradio operating with RTL-compatible dongles. I have included an example directory with a WAV file for testing the decoder, and the log of last night's reception. The decoder is far from perfect, but I think it behaves no worse than the sound-card based decoder I have used (e.g kracars and wacars). It is also, to the best of my knowledge, the only opensource ACARS decoder since acarsdec does not seem functional (at least not with the provided example file), so someone might find it useful, and maybe even inspiring for improvement. I hope to learn by next week to add parameter passing from grc to the C++ program so that two parameters -- the log file which is currently hardcoded to be located in /tmp/log_file.txt, and a threshold value which is currently hardcoded but should be user-tunable (or ideally automagically adapted to received power levels, but so far such attempts have failed) -- can be provided through the gnuradio-companion interface. This will provide a minor update of the archive. This is my very first attempt at grc block programming, so any feedback is welcome. I have updated the manuscript describing the development method -- still in French unfortunately, hoping to translate to English sometimes in the coming month -- and uploaded the PDF document at http://jmfriedt.free.fr/lm_sdr.pdf for any French speaking audience to comment on. Jean-Michel -- JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 32 av. observatoire, 25044 Besancon, France