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What are the technical characteristics of 3G and LTE? Will we lose a very useful fallback? I ask because I have a very modern device which is basically useless
by sharikous 5y ago
What are the technical characteristics of 3G and LTE? Will we lose a very useful fallback?
I ask because I have a very modern device which is basically useless when I put there a SIM of an operator which has LTE only, and works well with a 3G/LTE operator. I am speaking of the countryside and I wonder if the problem is the operator coverage or the technology utilized.
- CountSessine 5y agoDisclaimer: I'm not a dark-mage-of-the-smith-chart - I'm just a dude who had to take a course in EM once. Honestly, I'm pretty ignorant and you should take all of this with a grain of salt. My understanding is that the noise model is very different - that LTE/ofdm are very good at getting around radio noise by-frequency - ie a bunch of interference at a particular frequency. But 3G/umts/cdma was very good at dealing with multi-path distortion because of the whole chip-code-orthogonality property and the fact that the radio would have multiple time-shifted taps on the antenna. That would mean that in theory LTE would be better at dealing with persistent environmental noise, but 3G would be better in a city where the phone is receiving that same signal but reflected against buildings and slightly time-shifted. I doubt this makes any difference in your case - it's probably just that 3G is typically on 850MHz and that LTE is probably on a higher frequency like 2300MHz which wouldn't propagate as well.