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Irradiance probability density function for turbulence induced fading in free space optics
journal contribution
posted on 2023-06-10, 04:24 authored by Yousef M Shishter, Rupert YoungRupert Young, Falah AliFalah AliA model for the irradiance probability density function for turbulence induced fading in free space optical communications is derived. The derivations are based on expanding on the extended Rytov method by associating a doubly stochastic process to model large scale scintillation. In particular, the small scale induced irradiance fluctuations are modeled by a single gamma distribution, while the large scale induced fluctuations are modeled as a doubly stochastic process of gamma and inverted gamma distributions, thus better approximating the lognormal distribution. The resultant distribution’s probability density and cumulative density functions are both given in closed forms. Moreover, the resultant model parameters are given based on strong scintillation theory. Through comparison with previously published results and experimental data, including lognormal and gamma–gamma distributions, it is concluded that the proposed model agrees well with measurements for weak and strong scintillation conditions in cases of both aperture averaging and a point like receiver. Therefore, the proposed model can be used for the performance analysis of optical wireless systems.
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Publication status
- Published
File Version
- Published version
Journal
Journal of the Optical Society of America A: Optics, Image Science & Vision (JOSA A)ISSN
1084-7529Publisher
Optical Society of AmericaExternal DOI
Issue
7Volume
39Page range
1267-1274Department affiliated with
- Engineering and Design Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2022-08-04First Open Access (FOA) Date
2022-08-12First Compliant Deposit (FCD) Date
2022-08-04Usage metrics
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