amplitude fading

См. также в других словарях:

• Fading — This article is about signal loss in telecommunications. For the poetry book, see Fading (book). For other uses, see Fade (disambiguation). Frequency selective time varying fading causes a cloudy pattern to appear on a spectrogram. Time is shown… …   Wikipedia

• Fading — Fa|ding 〈[ fɛıdıŋ] n. 15; unz.〉 1. 〈Rundfunktech.〉 1.1 An u. Abschwellen des Tones 1.2 Ausblenden des Tones durch stetige Abnahme der Lautstärke (besonders bei der Wiedergabe von Musikstücken) 2. 〈Kfz Tech.〉 Nachlassen der Bremswirkung bei… …   Universal-Lexikon

• Fading distribution — In telecommunications, a fading distribution is the probability distribution of the value of signal fading relative to a specified reference level.In the case of phase interference fading, the time distribution of the instantaneous field strength …   Wikipedia

• Rayleigh fading — is a statistical model for the effect of a propagation environment on a radio signal, such as that used by wireless devices.Rayleigh fading models assume that the magnitude of a signal that has passed through such a transmission medium (also… …   Wikipedia

• Rician fading — is a stochastic model for radio propagation anomaly caused by partial cancellation of a radio signal by itself mdash; the signal arrives at the receiver by two different paths, and at least one of the paths is changing (lengthening or shortening) …   Wikipedia

• Nakagami fading — Unfortunately, mobile radio links are subject to severe multipath fading due to the combination of randomly delayed, reflected, scattered, and diffracted signal components. Fading leads to serious degradation in the link carrier to noise ratio… …   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

• 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

• 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

• Coherence bandwidth — is a statistical measurement of the range of frequencies over which the channel can be considered flat , or in other words the approximate maximum bandwidth or frequency interval over which two frequencies of a signal are likely to experience… …   Wikipedia

• telecommunications media — Introduction       equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation       Every… …   Universalium