hi
I want to clear one basic question about the selection of data rate in modulation schemes.
For example, If we consider a simple ook modulation scheme. let Carrier frequency is 60GHz. How high can the data rate be selected? (what limits to go for high data rate (eg 20Gbps)?) using a higher modulation scheme can be one technique to get a higher data rate but on the cost of increased complexity and power consumption etc.

 

The practical limit is the available bandwidth. Not sure what ook refers to, so give us a hint. Making a wideband signal at such frequencies is difficult. One problem to consider is the variable propagation from the high band edge to the low band edge. 60 GHz ± 10 GHz. would cover a band from 50 GHz. to 70 GHz. It would not surprise me to observe that the 70 GHz part of the resulting RF does not propagate as well as the 50 GHz. part. This would be in addition to the interference caused to other services in that range if the signal were broadcast. If we are talking a cable system then we have to find a cable where the attenuation was flat across the entire band. These are daunting challenges. Good luck with your plans and let us know how it is going