Modulation

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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]

There are three primary types of modulation: amplitude, frequency, and phase modulation.

Amplitude Modulation[edit]

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]

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]

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]

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]

References[edit]


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Modulation[edit]

  • Modulation categorization
    Modulation categorization
  • AM and FM modulation
    AM and FM modulation
  • Waterfall AM
    Waterfall AM
  • Waterfall FM
    Waterfall FM
  • Baud rate
    Baud rate

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