Analog and Digital Signalling Essay
a.) Explain the fundamental differences of analog and digital signalling.
Baher (2001, p. 2) states that the natural world we live in, as well as most artificial sources, produce signals which we have grown accustomed to consider mainly of the analog type. This means that the signal f (t) is defined, somehow, for all values of the continuous variable t, and its amplitude can assume any value of a continuous range. Such a signal is referred to as an analog signal. In contrast to analog signals, other signals are defined only for discrete values of t. Thus, the independent variable t assumes discrete values.
Goleniewski (2006, p. 18) pointed out that when the signal being a continuously variable …show more content…
Goleniewski (2006, p. 20) also explain why digital signal is able to recovered after distortion from noise. Rather than use dumb amplifiers, digital networks use regenerative repeaters, also referred to as signal regenerators. As a strong, clean, digital pulse travels over a distance, it loses power, similar to an analog signal. The digital pulse, like an analog signal, is eroded by impairments in the network. But the weakened and