Comments (2)
This repo assumes that the first OFDM symbol (first symbol in the 9-symbol case) is not present as it's not important. So you shouldn't have to remove any OFDM symbols. Each burst only contains 2 OFDM symbols with ZC sequences. Could you show me where I mistakenly wrote 4? I'd like to fix that.
In the 9 OFDM symbol case there are really just 6 data symbols as the first "data" symbol is a duplicate of the first. That's why it's safe to ignore the first symbol. I'm not sure that the Mavic 3 uses the same signal structure, so I can't really tell you what should or should not change =\
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Thanks for your answer. I was referring to this guide: https://github.com/proto17/dji_droneid/wiki/DJI-Mavic-3-DroneID-Analysis .
Anyway, I was able to solve the problem: I was simply looking at the wrong bursts. It seems that the Mavic 3 trasmits two types of message in addition to the video downlink. One is the standard Drone ID which is similar to Mini 2's, the other one is this strange message using 4 ZC sequences.
With the correct bursts the decoding process went ok.
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Related Issues (20)
- AttributeError: module 'gnuradio.fosphor' has no attribute 'glfw_sink_c' HOT 2
- I don't understand what is mean this results HOT 6
- Some problem HOT 1
- Zc sequence identify HOT 2
- parameters of descrambler HOT 2
- Got some questions HOT 1
- Final step error: NO DRONE ID HOT 27
- Detect DroneID burst without "gr-fosphor" HOT 4
- the problem of frequency_offset HOT 2
- This DJI Drone ID Not Working for Phantom 4 Pro v2.0 Data HOT 2
- different sequence HOT 1
- Low Correlation Scores HOT 4
- Proposal for normalized cross correlation
- Signal Detection HOT 3
- samples for tests HOT 1
- baudline not available HOT 1
- gnuradio import droneid HOT 3
- Ocusync 4 cannot be resolved HOT 4
- ocysync 3
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