Suppose for a moment that we had arrived at this digital epoch, but had only just discovered wireless. Would we start by designing and building the wireless systems we now take for granted? I think not! The reality is; today’s wireless thinking is largely set by developments stretching back well over 100 years, and constrained by the limited physical models and mathematical ability of that time. Concepts such as LF, HF, VHF, UHF, SHF - Long, Medium and Short Waves - and dedicated channels are a result. So deep is all this that some actually think the ‘frequency domain’ is real as opposed to an abstract engineering convenience.
Every aspect of wireless communication we enjoy today stems from old analogue thinking and there is very little in this digital era that we could truly consider to be radically new. In truth, our digital radios are really analogue at their core, and so is the very way we think.
So a manifest for change might include:
No more bands or channels
No government regulation or control
The EM spectrum used as a continuum
Communication @ minimal energy
Operating below the thermal floor
Orthogonality through coding
Massive spread factors