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Shannonowi i Nysquistowi 🙂 Czy oni tez byli glupcami?

Chocby skaly sr..y to nie podzielisz takiego przebiegu na sinusy. I wlasnie z tego powodu mowi sie, ze impuls ma nieskonczona energie, i dlatego wymaga nieskonczonego pasma, i dlatego nie stosuje sie „prawdziwych” impulsow w telekomunikacji. Dobrze mowisz; z Fouriera wyjdzie niskonczony ciag harmonicznych.

Based on Fourier analysis, a digital signal is a composite analog signal. The bandwidth

is infinite, as you may have guessed. We can intuitively come up with this concept when

we consider a digital signal. A digital signal, in the time domain, comprises connected

vertical and horizontal line segments. A vertical line in the time domain means a fre-

quency of infinity (sudden change in time); a horizontal line in the time domain means a

frequency of zero (no change in time). Going from a frequency of zero to a frequency of

infinity (and vice versa) implies all frequencies in between are part of the domain.

str 74, chapter 3

DATA COMMUNICATIONS ANDNETWORKING

Fourth Edition

Behrouz A. Forouzan



<-= Have you ever noticed how fast Windows runs?? =->

<-= Neither have I =->