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>>Where I live, a lot of people have 3G internet. >Well, yes 3G is Shared Spectrum. Sorry, I think I meant 4G, not 3G. It's marketed as LTE here. > Exceed av
by yarcob 6y ago
>>Where I live, a lot of people have 3G internet.
>Well, yes 3G is Shared Spectrum.
Sorry, I think I meant 4G, not 3G. It's marketed as LTE here.
> Exceed available bandwidth of what? Per Spectrum? Shannon–Hartley theorem?
No, not Shannon-Hartley. That's just a mathematical model.
When EM waves propagate, they are subject to diffraction, which limits both the amount of information that can be transmitted per time interval, and also the spatial resolution of the transmission. Even with antenna arrays or distributed antennas you can't get past diffraction limits; you can just get closer to them.
To get around diffraction limits, you need to use higher frequencies / shorter wavelengths. (Which has the side effect that you loose the ability of signals to go around / through obstacles, so you need a lot more cell towers.)
We're at a point where new technologies just make different trade-offs (eg. shorter wavelengths for areas with lots of wireless clients vs. longer wavelengths for sparse areas).
With a fibre connection, you don't need to make these tradeoffs; you just need to dig up the ground and you can have as much bandwidth between two points as you want.