I have a Amateur Radio License.
I am specifically experimenting with 1.2GHz digtal data, running at 16 to 128kpbs.
At this time I am experimenting entirely within my RF tent environment.
I am using two GNUradio based universal radio boards (usrp's).
The most interested aspects of my tests is that modelling of signal propagation actually works quite well.
In other words, real world behavior of signals is pretty accurately calculated by programs like splat