Editing Demodulation (section)

== Techniques ==

There are several ways of demodulation depending on how parameters of the base-band signal such as amplitude, frequency or phase are transmitted in the carrier signal. For example, for a signal modulated with a linear modulation like [[amplitude modulation]] (AM), we can use a [[synchronous detector]]. On the other hand, for a signal modulated with an angular modulation, we must use a [[frequency modulation]] (FM) demodulator or a [[phase modulation]] (PM) demodulator. Different kinds of circuits perform these functions.

Many techniques such as [[carrier recovery]], [[clock recovery]], [[bit slip]], [[frame synchronization]], [[rake receiver]], [[pulse compression]], [[Received Signal Strength Indication]], [[error detection and correction]], etc., are only performed by demodulators, although any specific demodulator may perform only some or none of these techniques.

Many things can act as a demodulator, if they pass the radio waves on [[Nonlinearity|nonlinearly]].<ref>{{citation |title=Ghostly voices |publisher=New Scientist |url=https://www.newscientist.com/article/mg16422067-300-the-last-word/ |date=2 October 1999 |access-date=2017-04-25}}</ref>