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Rain‐induced effects on the envelope probability density functions in multipath channels
Author(s) -
Gong Shuhong,
Huang Jiying,
Zhao Xiaolong
Publication year - 2008
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2007rs003759
Subject(s) - rician fading , probability density function , fading , multipath propagation , envelope (radar) , rayleigh fading , scattering , cumulative distribution function , rayleigh scattering , physics , rayleigh distribution , meteorology , computational physics , statistical physics , channel (broadcasting) , environmental science , mathematics , telecommunications , statistics , optics , radar , computer science
The fluctuant peculiarities of a signal passing through rain area are studied with the theory of waves propagating through random media. The characteristics of the probability density distribution of a received envelope in rain region are calculated and discussed. The fluctuant rules of a signal in rain region are found. The effects induced by raindrops scattering on the envelope probability density functions (PDFs) in multipath channels are studied using the results in the work by Durgin et al. (2004, 2002). The detailed formulae are derived for one‐path channel and two‐path channel. The envelope PDFs are calculated for a narrowband signal with a given carrier frequency at the condition of a certain rain rate and a certain propagating distance, which are contrasted with those calculated at unfluctuant condition. The general results of the effects induced by raindrops scattering on the envelope PDFs in multipath channels are found. The methods evaluating the effects on Rayleigh fading distribution model and Rician fading distribution model induced by raindrops scattering are discussed. The general methods for studying the impacts of meteorological scattering environment (snow, dust storm for example) on the envelope PDFs in multipath channels are searched.