frequency-selective fading - определение. Что такое frequency-selective fading
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Что (кто) такое frequency-selective fading - определение

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.
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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.
Frequencies         
  • Diagram of the relationship between the different types of frequency and other wave properties.
  • Complete spectrum of [[electromagnetic radiation]] with the visible portion highlighted
  • Modern frequency counter
  • Hz]]
  • The [[sound wave]] spectrum, with rough guide of some applications
NUMBER OF OCCURRENCES OR CYCLES PER TIME
Wave period; Frequencies; Period (physics); Frequency (wave motion); Frequency dependence; Oscillation frequency; Frekvens; Periodic time; Frequency measurement; Period (frequency); Temporal frequency; Repetition frequency; Occurrence frequency; Event frequency; Oscillation rate; Repetition rate; Occurrence rate; Event rate; Rate of occurrence; Rate of repetition; Rate of oscillation; Wave frequency; Ordinary frequency; Aperiodic frequency
·pl of Frequency.
Selective auditory attention         
THE FOCUS ON A SPECIFIC SOURCE OF A SOUND OR SPOKEN WORDS
Selective hearing; Selective deafness; User:Spicysugar07/Selective Auditory Attention; Wikipedia talk:Articles for creation/Selective Auditory Attention; Selective Auditory Attention
Selective auditory attention or selective hearing is a type of selective attention and involves the auditory system. Selective hearing is characterized as the action in which people focus their attention intentionally on a specific source of a sound or spoken words.
selective service         
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  • military segregated]].
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  • The former seal of the Selective Service System
  • 100px
  • Selective service information available in a local post office in [[Boston, Massachusetts]]
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US FEDERAL GOVERNMENT AGENCY THAT MAINTAINS INFORMATION ON THOSE POTENTIALLY SUBJECT TO MILITARY CONSCRIPTION
Selective Service; 3-A deferment; Selective service; Class 1-A; 4F (military conscription); U.S. Selective Service; 4-F (US Military); Military deferment; Student deferment; Selective Service Administration; Selective Service Board; 4-F (Selective Service System); Class 1-Y; Selective Service registration; Selective Service Number; Selective Service System classification; Selective Service Draft Act; Director of Selective Service; D.S.S. Form 1
In the United States, selective service is a system of selecting and ordering young men to serve in the armed forces for a limited period of time.
N-UNCOUNT
Audio frequency         
  • C3, an octave below middle C. The frequency is half that of middle C (131 Hz).
  • C5, an octave above middle C. The frequency is twice that of middle C (523 Hz).
  • middle C]] (262 Hz). (Scale: 1 square is equal to 1 [[millisecond]])
PERIODIC VIBRATION WHOSE FREQUENCY IS AUDIBLE TO THE AVERAGE HUMAN
Audio frequencies; Sound frequency; Frequency (sound); Audio Frequency; Audible frequency; Audio-frequency; Audiofrequency
An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is in the band audible to the average human, the human hearing range. The SI unit of frequency is the hertz (Hz).
audio frequency         
  • C3, an octave below middle C. The frequency is half that of middle C (131 Hz).
  • C5, an octave above middle C. The frequency is twice that of middle C (523 Hz).
  • middle C]] (262 Hz). (Scale: 1 square is equal to 1 [[millisecond]])
PERIODIC VIBRATION WHOSE FREQUENCY IS AUDIBLE TO THE AVERAGE HUMAN
Audio frequencies; Sound frequency; Frequency (sound); Audio Frequency; Audible frequency; Audio-frequency; Audiofrequency
¦ noun a frequency of oscillation capable of being perceived by the human ear, generally between 20 and 20,000 Hz.
selective service         
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  • military segregated]].
  • 100px
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  • The former seal of the Selective Service System
  • 100px
  • Selective service information available in a local post office in [[Boston, Massachusetts]]
  • 100px
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US FEDERAL GOVERNMENT AGENCY THAT MAINTAINS INFORMATION ON THOSE POTENTIALLY SUBJECT TO MILITARY CONSCRIPTION
Selective Service; 3-A deferment; Selective service; Class 1-A; 4F (military conscription); U.S. Selective Service; 4-F (US Military); Military deferment; Student deferment; Selective Service Administration; Selective Service Board; 4-F (Selective Service System); Class 1-Y; Selective Service registration; Selective Service Number; Selective Service System classification; Selective Service Draft Act; Director of Selective Service; D.S.S. Form 1
¦ noun N. Amer. service in the armed forces under conscription.
Selective PPAR modulator         
DRUG CLASS
Selective PPARγ modulator; Selective PPARγ modulators; SPPARM; SPPARMs; Selective PPAR modulators
A selective PPAR modulator (SPPARM) is a selective receptor modulator of the peroxisome proliferator-activated receptor (PPAR). Examples include SPPARMs of the PPARγ, BADGE, EPI-001, INT-131, MK-0533, and S26948.

Википедия

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.