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amplitude modulation index

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  • Modulation index — The modulation index (or modulation depth) of a modulation scheme describes by how much the modulated variable of the carrier signal varies around its unmodulated level. It is defined differently in each modulation scheme. See: Amplitude… …   Wikipedia

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

  • Modulation transfer function (infrared imaging) — The Modulation Transfer Function (MTF) is used to approximate the position of best focus of an infrared imaging system. In an imaging system, best focus is typically achieved when the MTF is between 0.4 and 0.6; most often at 0.5 (50% cutoff… …   Wikipedia

  • Frequency modulation — See also: Amplitude modulation In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency (contrast this with amplitude modulation, in which the amplitude of the carrier is varied while its… …   Wikipedia

  • Polar modulation — is analogous to quadrature modulation in the same way that polar coordinates are analogous to Cartesian coordinates. Quadrature modulation makes use of Cartesian coordinates, x and y . When considering quadrature modulation, the x axis is called… …   Wikipedia

  • Phase modulation — (PM) is a form of modulation that represents information as variations in the instantaneous phase of a carrier wave.Unlike its more popular counterpart, frequency modulation (FM), PM is not very widely used. This is because it tends to require… …   Wikipedia

  • Speech transmission index — Speech Transmission Index, short STI is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro… …   Wikipedia

  • Speech Transmission Index — Speech Transmission Index, short STI is a measure of intelligibility of speech. The understanding of speech, the intelligibility is directly dependent of the background noise level, of the reverberation time, and of the size of the room. For the… …   Wikipedia

  • Frequency modulation synthesis — In audio and music frequency modulation synthesis (or FM synthesis) is a form of audio synthesis where the timbre of a simple waveform is changed by frequency modulating it with a modulating frequency that is also in the audio range, resulting in …   Wikipedia

  • Trellis-Coded Modulation — Die Trellis Code Modulation, oder auch als Ungerboeck Code, Trellis Codierung, Trellis Modulation, abgekürzt als TCM bezeichnet, ist eine in der digitalen Signalverarbeitung eingesetzte Kombination aus Kanalcodierung zur Vorwärtsfehlerkorrektur… …   Deutsch Wikipedia

  • Trellis modulation — Die Trellis Code Modulation, oder auch als Ungerboeck Code, Trellis Codierung, Trellis Modulation, abgekürzt als TCM bezeichnet, ist eine in der digitalen Signalverarbeitung eingesetzte Kombination aus Kanalcodierung zur Vorwärtsfehlerkorrektur… …   Deutsch Wikipedia

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