Search results
Results from the WOW.Com Content Network
The level crossing rate and average fade duration taken together give a useful means of characterizing the severity of the fading over time. For a particular normalized threshold value ρ {\displaystyle \rho } , the product of the average fade duration and the level crossing rate is a constant and is given by
Rician fading or Ricean fading is a stochastic model for radio propagation anomaly caused by partial cancellation of a radio signal by itself — the signal arrives at the receiver by several different paths (hence exhibiting multipath interference), and at least one of the paths is changing (lengthening or shortening).
The probability density function is (,) = ((+)) (),where I 0 (z) is the modified Bessel function of the first kind with order zero.. In the context of Rician fading, the distribution is often also rewritten using the Shape Parameter =, defined as the ratio of the power contributions by line-of-sight path to the remaining multipaths, and the Scale parameter = +, defined as the total power ...
TWDP models fading due to the interference of two strong radio signals and numerous smaller, diffuse signals. TWDP is a generalized system using a statistical model to produce results. Other statistical methods for predicting fading, including Rayleigh fading and Rician fading, can be considered as special cases of the TWDP model. The TWDP ...
The terms slow and fast fading refer to the rate at which the magnitude and phase change imposed by the channel on the signal changes. The coherence time is a measure of the minimum time required for the magnitude change or phase change of the channel to become uncorrelated from its previous value.
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 usually approximates a Rayleigh distribution when several signal components of equal amplitude are present.
At around 600 miles wide and up to 6,000 meters (nearly four miles) deep, the Drake is objectively a vast body of water. To us, that is. To the planet as a whole, less so.
Rician fading; T. Thermal fade; Two-wave with diffuse power fading; W. Weibull fading This page was last edited on 26 February 2008, at 21:39 (UTC). Text is ...