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- Nov 21, 2017
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Hi,
Can anyone give me any idea where to find even a little information about DJI Inspiron 1(2) or Phantom 4 remote control signal parameters as well as for binary package (frame) format after the demodulation process?
- Modulation - It's 100% sure DJI uses OFDM modulation scheme but what is the baud rate of the transmission as well as of the sub-channels? According to the oscillogram it should be QAM but I'm not sure if 16,32 or 64QAM. Whait is the number all sub-channels? What should be the mapping bit pattern after their demodulation?
- Interleaver - Is there interleaving scheme and what is the number of coded bits per sub-channel?
- FEC - constraint length, code generator polynomials, hard or soft decision type
- Binary packet format - preamble, drone address or ID, frame length, payload, CRC,...
It will be highly appreciated if someone shares info about these sub-algorithms.
Thanks,
Ivan
Can anyone give me any idea where to find even a little information about DJI Inspiron 1(2) or Phantom 4 remote control signal parameters as well as for binary package (frame) format after the demodulation process?
- Modulation - It's 100% sure DJI uses OFDM modulation scheme but what is the baud rate of the transmission as well as of the sub-channels? According to the oscillogram it should be QAM but I'm not sure if 16,32 or 64QAM. Whait is the number all sub-channels? What should be the mapping bit pattern after their demodulation?
- Interleaver - Is there interleaving scheme and what is the number of coded bits per sub-channel?
- FEC - constraint length, code generator polynomials, hard or soft decision type
- Binary packet format - preamble, drone address or ID, frame length, payload, CRC,...
It will be highly appreciated if someone shares info about these sub-algorithms.
Thanks,
Ivan