Signal modulation: Difference between revisions

Revision as of 03:42, 25 April 2024

Revision as of 11:11, 6 June 2024

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{{Modulation techniques}}

[[File:Modulation categorization.svg|thumb|300px|Categorization for signal modulation based on data and carrier types]]

Modulation is defined as the process by which some characteristics like [[Amplitude|amplitude]], frequency, and phase of a carrier signal are varied in accordance with a modulating wave.

In [[electronics]] and [[telecommunications]], '''modulation''' is the process of varying one or more properties of a periodic [[waveform]], called the ''[[carrier signal]]'', with a separate signal called the ''modulation signal'' that typically contains information to be transmitted.{{Citation needed|date=March 2023}} For example, the modulation signal might be an [[audio signal]] representing [[sound]] from a [[microphone]], a [[video signal]] representing moving images from a [[video camera]], or a [[digital signal]] representing a sequence of binary digits, a [[bitstream]] from a computer.