demodulation

n. act or process of separating a modulated message from the carrier signal (Computers, Telecommunications)

Demodulation is the act of removing the modulation from an analog signal to get the original baseband signal back. Demodulating is necessary because the receiver system receives a modulated signal with specific characteristics and it needs to turn it to base-band.There are several ways of demodulation depending on what parameters of the base-band signal are transmitted in the carrier signal, such as amplitude, frequency or phase. For example, if we have a signal modulated with a lineal modulation, like AM (Amplitude Modulated), we can use a synchronous detector. On the other hand, if we have a signal modulated with an angular modulation, we must use a FM (Frequency Modulated) demodulator or a PM (Phase Modulated) demodulator respectively. There are different kinds of circuits that make these functions.
See more at Wikipedia.org...

Noun
1. (electronics) the reception of a signal by extracting it from the carrier wave
(hypernym) reception
(derivation) demodulate
(classification) electronics

n. demodulation, act or process of separating a modulated message from the carrier signal (Computers, Telecommunications)

The recovery, from a modulated carrier, of a signal having substantially the same characteristics as the original modulating signal. (188 )