In order to correctly demodulate a received signal you need to be able to identify it first. This section will provide some guidance around identifying common signals.
This website is a good place to start.
Amplitude Shift Keying (ASK)
The below example is the most simple form of ASK, known as On-Off Keying (OOK):
Frequency Shift Keying (FSK)
The below example is the most simple form of FSK, known as 2-FSK or Binary FSK:
TODO - add more stuff here