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In-phase and Quadrature

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См. также в других словарях:

  • Phase (waves) — Phase in waves is the fraction of a wave cycle which has elapsed relative to an arbitrary point.[1] Contents 1 Formula 2 Phase shift 3 Phase difference …   Wikipedia

  • Phase-shift keying — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

  • Quadrature phase — Communication signals often have the form::A(t)cdot sin [2pi ft + phi(t)] , which is called envelope and phase form.An equivalent representation, called quadrature carrier form, is::I(t)cdot sin(2pi ft) + Q(t)cdot underbrace{cos(2pi ft)}… …   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

  • Quadrature phase-shift keying — Phase shift keying Traduction terminée Phase shift keying → …   Wikipédia en Français

  • Phase shift keying — Traduction terminée Phase shift keying → …   Wikipédia en Français

  • Phase-shift keying — Le Phase shift keying (ou PSK, soit « modulation par déplacement de phase ») désigne une famille de formes de modulations numériques qui ont toutes pour principe de véhiculer de l information binaire via la phase d un signal de… …   Wikipédia en Français

  • 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

  • Quadrature — Quadrature, derived from Latin quadrare , may refer to:In signal processing: *Quadrature amplitude modulation (QAM), a modulation method of using both a carrier wave and a quadrature carrier wave that is 90° out of phase with the main carrier… …   Wikipedia

  • Phase contrast microscopy — Phase contrast image of a cheek epithelial cell Phase contrast microscopy is an optical microscopy illumination technique of great importance to biologists in which small (invisible to the human eye) phase shifts in the light passing through a… …   Wikipedia

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