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by kmeisthax
1065 days ago
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Would the TV bands actually be useful for that? Wi-Fi has actually been going up the frequency bands looking for spectrum, from 2.4GHz to 5GHz and now 6GHz. Each one adds significantly more bandwidth (but worse propagation for a given transmitter power). If we were to make a "Wi-Fi 7R"[0] with 900MHz support, which is right next to some of the upper UHF TV stations in the US, wouldn't that be terribly slow and have lots of interference from overlapping base stations? I mean, 2.4GHz is already crowded to the point of unusability in a lot of dense areas. [0] The R stands for "range" |
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As far as I know, that's mostly due to these bands simply having more spectrum available, in addition to actual physical propagation characteristics (lower frequencies indeed propagate a bit better across obstacles like walls or floors, and slightly better through air, but not at all through free space).
In addition to that, unlicensed bands arguably work precisely because they are (by regulation) limited mostly to short-range applications, using maximum transmission power as a proxy for range. One person's signal is another person's noise, after all.
There's other unlicensed bands available that are more suitable for long-range communication, but these usually come with duty cycle restrictions for the same reason.