Statistical analysis of rain fade slope

Abstract

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Fade Slope Statistics on a Slant Path at 50 GHz

“…In general, no clear signs of asymmetry have been observed in any time interval , which is in agreement with results from other experiments [6].…”

“…In the ITU-R model [2], based on [6], the probability density of fade slope at a given attenuation is given by The only characterizing parameter is the standard deviation of the conditional distributions, , that is proportional to the attenuation level dB/s…”

Statistics of rain attenuation revisited

“…Based on the experimental results described in [1] Figure 2a shows a comparison with the Student's-t distribution. Note the similarity with the ad-hoc distribution in [7] (8) which however was valid for the slope conditioned on the attenuation. Figure 2b shows the fade slope versus attenuation for three different standard deviations in theory.…”

“…More recently, there has been considerable focus on details of the channel through rain, where the speed of change of attenuation is considered, expressed as a rain fade slope measured in dB/s [7,1]. The distribution of slopes were compared with an ad hoc distribution, while it is shown here that during the heavy fading periods the unconditional distribution is the well known Student's-t.…”

General N-State Markov Model for Rain Attenuation Time Series Generation

“…Max Van de Kamp provides an approximating expression for satellite links in [13]. We carried out, that the CPDF of fade slope at each different attenuation levels can be estimated well with simple Gaussian distributions as given by Eq.…”