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Data Radio Channel (DARC)

Implementation for python and gnuradio, following ETSI EN 300 751 v1.2.1

Contents

./docs/

Documentation about the MVG Layer 6 Protocol, gained from reverse engineering

./src/gr-darc/

Gnuradio implementation of Layer 1 and Layer 2

./src/py/

Python implementation of Layer 2-5

Operation

There are several possibilities to use the DARC implementation:

Offline

Receive and demodulate the DARC signal and dump the bitstream to a file, then open it using

python darc_prototype.py <filename>

Online

You can find the Gnurado Flowgraph here:

src/gr-darc/apps/darc_rx.grc

Receive and demodulate the DARC signal and process it using the DARC Layer2 block. Use the UDP sink to provide the Layer 2 data on the network. Process the other layers using

python darc_udp.py

Installation of the gr-darc out of tree module

Info Used GnuRadio-Version: 3.7.5.1

In the gr-darc folder:

  mkdir build
  cd build
  cmake ..
  sudo make install
  sudo ldconfig

Station IDs in Munich

ID ID (Hex) Stop Direction/Destination
1509 0x05E5 Schluesselbergstr Tram 19 -> Pasing
1510 0x05E6 Schluesselbergstr Tram 19 -> StVeitstr
1549 0x060D Grillparzer Bus 187 -> Ruemelinstr
1625 0x0659 Adunistr Bus 53 -> Aidenbachstr
1626 0x065A Adunistr Bus 53 -> Muenchner Freiheit
1642 0x066A Lehel Tram 18 -> Gondrellplatz
1701 0x06A5 Einsteinstr Bus 144 -> Ackermannbogen
1761 0x06E1 Sendlinger Tor Bus 62 -> Ostbahnhof
1775 0x06EF Waltherstr Bus 62 -> Rotkreuzplatz
1800 0x0708 Mariannenplatz Gondrellplatz
1814 0x0716 Maxmonument Tram 19 -> StVeitstr
1818 0x071A Maxmonument Tram 19 -> Pasing
1840 0x0730 Mariannenplatz Effnerplatz
1923 0x0783 Waltherstr Bus 62 -> Ostbahnhof
1927 0x0787 Isator/Zweibrueckenstr Bus 132 -> Forstenrieder Park

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