Modulation
Modulation is a process that changes the properties of a carrier wave based on the characteristics of an input signal. This process is fundamental in telecommunication and signal processing.
Types of Modulation[edit | edit source]
There are three primary types of modulation: amplitude, frequency, and phase modulation.
Amplitude Modulation[edit | edit source]
In amplitude modulation (AM), the amplitude of the carrier wave is varied in proportion to the waveform being sent. This waveform may correspond to sounds to be reproduced by a loudspeaker, or the light intensity of television pixels.
Frequency Modulation[edit | edit source]
Frequency modulation (FM) is a method of impressing data onto an alternating-current (AC) wave by varying the instantaneous frequency of the wave. This technique is commonly used in broadcasting, especially in the FM radio band.
Phase Modulation[edit | edit source]
Phase modulation (PM) is a modulation pattern that encodes information as variations in the instantaneous phase of a carrier wave. PM is used in digital music synthesis and telecommunications systems.
Applications of Modulation[edit | edit source]
Modulation is used in numerous fields such as telecommunications, broadcasting, and data communication. It is also used in systems such as Ethernet to encode data onto a carrier signal.
See Also[edit | edit source]
References[edit | edit source]
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