How do they process high frequency signals, much high than the available uC clock speeds ?

JimB said:

Actually, the radio system will be the limiting factor for the system data rate.
You cannot just arbitrarily keep on increasing the modulating frequency. As the modulating frequency increases, so does the bandwidth occupied by the signal. At some

ronsimpson said:

Adding to Jim's thoughts,

With high data rates the bandwidth is wide, the receiver must have a wide receiving area and lots of noise gets in.
With slow data rates the bandwidth is small and more noise can be filtered out.
Also with slow data there is more time to average out noise.
There is a correlation between data rage and noise or distance you can transmit/receive.

Click to expand...

point you will reach the stage where your signal is splattering all over signals on adjacent radio channels.

JimB

Click to expand...