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On a slight tangent Shannon had a lot to say about signal to noise ratios / bit error rates and you're not going to like the theoretical minimum transmitter pow
by VLM 11y ago
On a slight tangent Shannon had a lot to say about signal to noise ratios / bit error rates and you're not going to like the theoretical minimum transmitter power required to push 10 TB over 20 GHz of BW at a reasonable bit error rate into orbit. Now figure maybe twice that for practical implementation at that huge scale, and twice that again because ultra wide band amplifiers are not known for cheapness or efficiency... This theoretical satellite phone from 2050 is going to get somewhat warm in your hand...
- datenwolf 11y agoOh, I'm fully aware of the information theoretical limit. I just made an back-of-the-envelope estimation on the absolute theoretical upper bound, assuming a system operating at 0K and zero noise floor. My intention was to show, how small the available bandwidth is already under those idealized circumstances.