Raileigh fading - ορισμός. Τι είναι το Raileigh fading
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Τι (ποιος) είναι Raileigh fading - ορισμός

VARIATION OF THE ATTENUATION OF A SIGNAL WITH VARIOUS VARIABLES
Selective fading; Fade (radio); Signal fade; Flat fading; Upfade; Fading channel; Fast fading; Slow fading; Frequency-selective fading; Frequency selective fading; Shadow fading; Dispersive fading; Amplitude fading; Doppler Spread; Doppler spread
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  • Frequency-selective time-varying fading causes a cloudy pattern to appear on a [[spectrogram]]. Time is shown on the horizontal axis, frequency on the vertical axis and signal strength as grey-scale intensity.

Fading         
·noun Loss of color, freshness, or vigor.
II. Fading ·noun An Irish dance; also, the burden of a song.
III. Fading ·adj Losing freshness, color, brightness, or vigor.
IV. Fading ·p.pr. & ·vb.n. of Fade.
Fading         
In wireless communications, fading is variation of the attenuation of a signal with various variables. These variables include time, geographical position, and radio frequency.
Rayleigh fading         
  • Densely built Manhattan has been shown to approach a Rayleigh-fading environment.
  • The normalized Doppler power spectrum of Rayleigh fading with a maximum Doppler shift of 10 Hz.
  • Filtered by Butterworth filter Rayleigh time series (sampling frequency is 120 Hz)
  • One second of Rayleigh fading with a maximum Doppler shift of 100 Hz.
  • One second of Rayleigh fading with a maximum Doppler shift of 10 Hz.
STATISTICAL MODEL
Jakes fading model
Rayleigh fading is a statistical model for the effect of a propagation environment on a radio signal, such as that used by wireless devices.

Βικιπαίδεια

Fading

In wireless communications, fading is variation of the attenuation of a signal with various variables. These variables include time, geographical position, and radio frequency. Fading is often modeled as a random process. A fading channel is a communication channel that experiences fading. In wireless systems, fading may either be due to multipath propagation, referred to as multipath-induced fading, weather (particularly rain), or shadowing from obstacles affecting the wave propagation, sometimes referred to as shadow fading.