Amplitude modulation is used

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• amplitude modulation — ► NOUN ▪ the modulation of a wave by varying its amplitude, used as a means of broadcasting an audio signal by radio …   English terms dictionary

• Amplitude modulation — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

• amplitude modulation — noun the modulation of a wave by varying its amplitude, used especially as a means of broadcasting an audio signal by combining it with a radio carrier wave …   English new terms dictionary

• Quadrature amplitude modulation — (QAM) (Pronounced IPA|kwa:m) is a modulation scheme which conveys data by changing ( modulating ) the amplitude of two carrier waves. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature… …   Wikipedia

• Pulse-amplitude modulation — Principle of PAM: (1) original signal, (2) PAM signal, (a) amplitude of signal, (b) time Pulse amplitude modulation, acronym PAM, is a form of signal modulation where the message information is encoded in the amplitude of a series of signal… …   Wikipedia

• quadrature amplitude modulation —    In communications, a data encoding technique used by modems. Quadrature amplitude modulation is a combination of phase and amplitude change that can encode multiple bits on a single carrier signal. For example, the CCITT V.42bis standard uses… …   Dictionary of networking

• quadrature amplitude modulation — A modulation system involving phase and amplitude modulation of a carrier, used in microwave and satellite communication links …   Dictionary of automotive terms

• Amplitude-shift keying — (ASK) is a form of modulation that represents digital data as variations in the amplitude of a carrier wave.The amplitude of an analog carrier signal varies in accordance with the bit stream (modulating signal), keeping frequency and phase… …   Wikipedia

• Amplitude — is the magnitude of change in the oscillating variable, with each oscillation, within an oscillating system. For instance, sound waves are oscillations in atmospheric pressure and their amplitudes are proportional to the change in pressure during …   Wikipedia

• Amplitude and phase-shift keying — or Asymmetric Phase shift keying, (APSK), is a digital modulation scheme that conveys data by changing, or modulating, both the amplitude and the phase of a reference signal (the carrier wave). In other words, it combines both Amplitude shift… …   Wikipedia

• pulse-amplitude modulation — /puls am pli toohd , tyoohd /, Telecommunications. modulation of the amplitude of a train of electric pulses used to carry signals (pulse carrier). Abbr.: PAM [1945 50] * * * …   Universalium