constant amplitude

См. также в других словарях:

• Constant amplitude zero autocorrelation waveform — A Constant Amplitude Zero AutoCorrelation waveform (abbreviated CAZAC) is a periodic complex valued signal with modulus one and out of phase periodic (cyclic) autocorrelation equal to zero. CAZAC sequences find application in wireless… …   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-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 modulation — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

• Constant Q transform — In mathematics and signal processing, the Constant Q Transform transforms a data series to the frequency domain, and is related to the Fourier Transform [1]. The transform can be thought of as a series of logarithmically spaced filters, with the… …   Wikipedia

• Constant Altitude Plan Position Indicator — Cappi de réflectivité à 1,5 km d altitude par le radar de Montréal(Source Environnement Canada) La Vue Panoramique à Altitude Constante plus connue sous l acronyme de CAPPI (Constant Altitude Plan Position Indicator) est un affichage qui donne… …   Wikipédia en Français

• 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

• constant of nutation — the amplitude of the celestial latitude component of the precessional nutation of the earth s axis that is equal to about 9.2 seconds of arc compare nutation 2 …   Useful english dictionary

• Propagation constant — The propagation constant of an electromagnetic wave is a measure of the change undergone by the amplitude of the wave as it propagates in a given direction. The quantity being measured can be the voltage or current in a circuit or a field vector… …   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

• 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