arib-t75-dsrc-toolkit

Toolkit for capturing & decoding 5.8GHz DSRC (Dedicated Short-Range Communications) used on ETC (Electronic Toll Collection) system in Japan

licenses

• licensed under MIT license from each different contributor, see header of indivisual files.

files

• /gnuradio : GNU Radio Companion (.grc) designs for capturing DSRC signals using HackRF One SDR

  • reconly_20m.grc : 20Msps capturing with packet detection on +5M/-5M shifted center frequency
  • etc2pcap_20m_dual.grc : ARIB STD-T75 ASK signal dual channel demodulator for 20Msps capture
  • etc2pcap_10m_single.grc : ARIB STD-T75 ASK signal single channel demodulator for 10Msps capture
  • tested on GNU Radio Companion 3.7.13.4 for Windows

• /mdcdscr

  • mdcdscr.go : descramble MDC frames by using FCMC LID

• /ofsmerge

  • ofsmerge.go : downlink and uplink pcaps merger with specified time offset

see also

• packet dissector plugin for Wireshark

  • https://github.com/chibiegg/arib-t75-dsrc-wireshark

• interpretive articles (in Japanese)

  • https://qiita.com/homelith/items/9acc6e307f33e73d676c
  • https://qiita.com/chibiegg/items/35f60ee8d4551905f603