GFSK modulated data demodulation settings (Experiment with MAVLink )
The flow graph I used to demodulate the GFSK modulated recorded MAVLink signals is as follows: The parameters used for FIR filter, low pass filter : reference The value for "fsk_deviation_hz" variable was taken from the documentation of the radio module. Here is a screen shot of baudline view of signals with the raw parameter settings I used. No of channels are two, since hackRF logs I and Q data. However here, I have disabled one channel out of the two in the waveform to get the pattern. HackRF data input to baudline: reference