Statistical modeling of optical attenuation measurements in continental fog conditions
| Autor: | Muhammad Amin, Muhammad Saleem Awan, Muhammad Khan, Abid Ali Minhas, Jawad Saleem, Rahim Dad Khan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Meteorology
Attenuation General Engineering Statistical model Probability density function 02 engineering and technology 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics 020210 optoelectronics & photonics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Environmental science Light beam Probability distribution Mixture distribution Akaike information criterion Weibull distribution |
| Zdroj: | Optical Engineering. 56:036113 |
| ISSN: | 0091-3286 |
| Popis: | Free-space optics is an innovative technology that uses atmosphere as a propagation medium to provide higher data rates. These links are heavily affected by atmospheric channel mainly because of fog and clouds that act to scatter and even block the modulated beam of light from reaching the receiver end, hence imposing severe attenuation. A comprehensive statistical study of the fog effects and deep physical understanding of the fog phenomena are very important for suggesting improvements (reliability and efficiency) in such communication systems. In this regard, 6-months real-time measured fog attenuation data are considered and statistically investigated. A detailed statistical analysis related to each fog event for that period is presented; the best probability density functions are selected on the basis of Akaike information criterion, while the estimates of unknown parameters are computed by maximum likelihood estimation technique. The results show that most fog attenuation events follow normal mixture distribution and some follow the Weibull distribution. |
| Databáze: | OpenAIRE |
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