Re: [Freetel-codec2] Codec2 FSK demodulator issues

2024-02-01 Thread Stephen Downward
Hi David, Thanks for your response. Mark VK5QI and I did some playing around and he figured out that the mask estimator works significantly better than the peak estimator for our use-case - it's decoding every packet consistently, even when allowing 0 bit flips in the preamble. One thing of note

Re: [Freetel-codec2] Codec2 FSK demodulator issues

2024-01-30 Thread david
Hi Stephen, The FSK modem has been used for burst applications (e.g. the FSK raw data mode). It's true that in general burst modem acquisition is more challenging than for continuous streaming data. It's difficult to comment on your specific case, as so many things are unique to a specific imple

[Freetel-codec2] Codec2 FSK demodulator issues

2024-01-30 Thread Stephen Downward
Hello all, I'm using the FSK demodulator from codec2 in a side project of mine. I have a 9600 bps stream running at 4.8KHz deviation. Packets have 32 bits of preamble, followed by a 32 bit sync word and then the actual data. I believe the FSK demodulator is having trouble locking on, and it's ca