|
From: | Adam Gorski |
Subject: | Modifying gr-adsb to Demodulate Uplink Format Messages |
Date: | Tue, 17 Nov 2020 00:12:21 +0000 |
Hello community, I am currently working with the OOT module gr-adsb; as written, this module captures downlink format (DF) ADS-B messages. I am interested in modifying this OOT module to instead capture uplink format (UF) messages.
Within this module the framer block recognizes a message prefix and tags that message with an offset that tells the next block, the demodulator, which pieces of information to demodulate. DF messages require pulse position demodulation
whereas UF messages require differential binary phase shift key demodulation. I’ve edited the framer to capture the UF prefix instead of the DF prefix, however I’m having trouble editing the demodulator. I’m currently pursuing two options:
Dpsk demod code:
https://github.com/GREO/gnuradio-git/blob/master/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py
If anyone is familiar with this OOT module, demodulation, or tagging in general I could use your help determining whether my thinking in tackling this problem is correct, whether the options I’m pursuing make sense, or if there are other
options you’d recommend exploring. Any help is greatly appreciated! Please let me know if additional details are required.
Thanks, Adam Gorski |
[Prev in Thread] | Current Thread | [Next in Thread] |