Phantom 4 Pro V2 Drone-ID Not Detected Using Repo, Detected by ANTSDR

[H-a-r-sha]

I'm currently running this code on my SDR with a sampling rate of 62.5 MHz. However, the receiver isn't detecting any Drone-ID frames. I enabled debug=True and checked the plots, but there’s no indication of Drone-ID frames being processed—despite the system successfully capturing and processing other 10 MHz signals.

To investigate further, I recorded the data and analyzed it offline using a spectrogram. I couldn’t find any signal resembling the Drone-ID format described in the paper. Instead, I observed a 14-symbol-long signal that includes two synchronization symbols within the same downlink band. I'm unsure whether this is a different type of Drone-ID signal specific to this drone, or just regular downlink communication.

I've also confirmed that I scanned both the 2.4 GHz and 5.8 GHz bands, but still didn’t detect any matching Drone-ID signals.

For comparison, I have an ANTSDR device that successfully detects a DJI Phantom drone and displays its altitude, latitude, and longitude. So I’m wondering:

Could the ANTSDR be decoding a different Drone-ID signal format not supported by this repo?

Or is there something I'm possibly missing or doing wrong in my current setup?

Any guidance or suggestions would be greatly appreciated!

[H-a-r-sha]

The 14-symbol signal is indeed downlink. After running the system for a while, I'm able to detect and process the drone ID. However, the signal is very short—around 600 µs—and it's frequency-hopping, so the receiver doesn't consistently capture the drone ID signal.

Can anyone advise on how I can process or detect the drone ID more frequently?

[huangjiansheng321-cloud]

Hello, I am currently trying to decode the Phantom 4 Pro V2. I would like to ask, does this model of drone really have a droneID? I have tried to decode it, but I keep failing. Although the code shows there is a ZC sequence, every attempt at decoding fails. Could you give me some advice based on your previous attempts at decoding?

The 14-symbol signal is indeed downlink. After running the system for a while, I'm able to detect and process the drone ID. However, the signal is very short—around 600 µs—and it's frequency-hopping, so the receiver doesn't consistently capture the drone ID signal.

Can anyone advise on how I can process or detect the drone ID more frequently?

[H-a-r-sha]

Yes, the Phantom 4 Pro V2 does transmit a DroneID signal. However, successfully decoding it is quite sensitive to the quality of the synchronization stages. In particular, accurate carrier frequency offset (CFO) estimation and correction, symbol timing recovery, and carrier phase recovery are all critical.

[huangjiansheng321-cloud]

是的，Phantom 4 Pro V2确实会发射DroneID信号。然而，成功解码时对同步阶段的质量非常敏感。特别是，准确的载波频率偏移（CFO）估计与校正、符号时序恢复以及载波相位恢复都至关重要。

Hello, this is the time-frequency diagram of my Phantom 4 Pro V2. However, I really didn't see the DroneID signal on this diagram. My device's sampling frequency is 80 MHz, and my center frequency is set at 2.44 GHz. The signal collection range is within 2.4 GHz to 2.48 GHz. If possible, could I ask for your Phantom 4 Pro V2 data and code? I want to see the differences between my signal and yours. This is my email: 1048181961@qq.com. Also, may I ask if I can pay for your consultation? This topic is particularly important to me.

< img width="1649" height="942" alt="Image" src="https://github.com/user-attachments/assets/f776b52c-c208-4ad5-8c2a-75d5f263fb86" />