I'm working with UC3B512 and I need to demodulate an ETSI ETS300-230 protocol sent with FSK modulation.
My input signal is sampled at 8KHz (by another device) and sent to me through an SSI bus.
I though that the best compromise in terms of speed is to use a zero-crossing detector.
Is there someone who could give me some hints on how to start from? I mean, are there some "predefined algorithms" can I use?
In attach there is a captured signal, and here its print on Audacity: