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Is you want more insight in what happens these days see also crazy modulation schemes like XPIC (cross-polarization interference cancelling) which is something like polarization-division multiplexing, and countless phase and amplitude transmission modulation schemes (MLT-3, up to 1024-QAM). Yes, "computation" is not done in that medium (except, really, for the complex demodulation process) but still in that field. Everyone is pushing hard to use what physical substrate and ingenuity they have on hand.

Binary computing if anything has a massive advantage in the accumulation of technology underlying it. Hard to beat. But still worth considering it now and then as it might be bringing you an advantage in one function or another. Currently within a chip, obviously storage density and transmission density - which doesn't mean you shouldn't keep it in mind for other functions.




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