The Case of the Closing Eye
It would be nice if digital signals could forget their analog origin, but insidious processes
like dispersion, skin effect, multiple reflections and random noise force us to think of a
signal as a complicated waveform instead of a tidy stream of bits. A combination of timedomain
and frequency-domain analysis distinguishes which problems can be fixed with
simple circuit modifications, clever tricks at the transmitter or receiver, from those that
require major investment. |
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