The idea here of using UWB would be to duplicate the data multiple times over a range of frequencies such that error correction becomes easier to compensate for noise and hence have lower power levels.
Also, once linked up, power can be adjusted to optimal for the weakest link to reduce detection further.
I like the idea of LiFi … but not sure about range when not directed.
As for myself I live in the countryside, not the city, so range is more important … also though, I don’t tink, given where I live and the attitudes of people here, that anyone would notice my use of a low power FM transmitter – I have a few in my big box of tech junk, one of them I still use – it’s a wireless headphone system that I bought off of ebay. So pretty sure that these kind of systems are allowed at power levels below a certain threshold.
Just doing some research … found this guy in australia testing the range of a legal small FM transmitter: https://www.youtube.com/watch?v=KFf_JUZHi-c
looks pretty good for range. Add UWB on top of that and your error correction would take you out a bit farther.
From the video:
This video is a range test of a class licensed LIPD FM transmitter operating in the 36.6 - 37 MHz band. The transmitter has just three transistors: FM modulator, 18.4 MHz crystal oscillator and frequency doubler. Output power was 10 - 20 milliwatts to a vertical dipole antenna.
The results were successful. A range of about 500 metres was achieved with low power. An increase to the 100mW legal limit would likely increase this distance to about 1 - 2km.