Amplitude modulation
Amplitude Modulation
Amplitude Modulation (pronunciation: /ˈæmplɪˌtjuːd mɒdjʊˈleɪʃən/) is a type of Modulation where the strength (amplitude) of the carrier wave is varied in proportion to the waveform being sent. This waveform may correspond to sounds or signals that are being transmitted.
Etymology
The term "Amplitude Modulation" is derived from the method of operation. "Amplitude" refers to the maximum extent of a vibration or oscillation, measured from the position of equilibrium, while "Modulation" refers to the process of varying one or more properties of a periodic waveform.
Related Terms
- Carrier wave: In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information.
- Frequency modulation: Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.
- Phase modulation: Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission.
- Demodulation: Demodulation is the act of extracting the original information-bearing signal from a carrier wave.
See Also
External links
- Medical encyclopedia article on Amplitude modulation
- Wikipedia's article - Amplitude modulation
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