constant-amplitude modulation

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

• 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

• amplitude modulation — (AM)    The technique of varying the amplitude or wavelength of a carrier wave in direct proportion to the strength of the input signal while maintaining a constant frequency and phase …   IT glossary of terms, acronyms and abbreviations

• pulse-amplitude modulation —    (PAM)    A form of modulation in which the pulse carrier s modulation varies according to a characteristic of the original analog signal; the pulse width is constant …   IT glossary of terms, acronyms and abbreviations

• Modulation — For musical change of key, see Modulation (music). For other uses, see Modulation (disambiguation). Passband modulation v · d · e …   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

• Modulation De Largeur D'impulsion — La modulation de largeur d impulsions (MLI ; en anglais : Pulse Width Modulation, soit PWM), est une technique couramment utilisée pour synthétiser des signaux continus à l aide de circuits à fonctionnement tout ou rien, ou plus… …   Wikipédia en Français

• modulation — /moj euh lay sheuhn, mod yeuh /, n. 1. the act of modulating. 2. the state of being modulated. 3. Music. transition from one key to another. 4. Gram. a. the use of a particular distribution of stress or pitch in a construction, as the use of… …   Universalium

• Modulation de largeur d'impulsion — La modulation de largeur d impulsions (MLI ; en anglais : Pulse Width Modulation, soit PWM), est une technique couramment utilisée pour synthétiser des signaux continus à l aide de circuits à fonctionnement tout ou rien, ou plus… …   Wikipédia en Français

• Modulation D'amplitude — La modulation d amplitude est une technique utilisée pour moduler un signal. Elle consiste en la multiplication du signal à moduler par un signal de fréquence plus élevée. Sommaire 1 La modulation d amplitude 1.1 Modulation du signal 1.2 Le… …   Wikipédia en Français

• 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