Both bluetooth and celular links use GHz level carrier waves. Yet the modulation techniques are very different. I know why FM is more resilient to noise comparing to AM.
But why is FM preferred for bluetooth and PSK, FSK ect. is used for modern cellular communication even though both have similar carrier frequencies? It is a large topic but I was looking for some reasoning behind not using FM for cellular communication.
Best Answer
FSK is a digital adaptation of FM. PSK is a digital adaptation of AM. The same ideas apply just the implementation is different due to tighter control of channels and timing.
Bluetooth specifically uses GFSK, gaussian FSK. It does not use FM as an analog radio station would.