Vol. 51, Issue 3, pp. 335-348

Vol. 51 Issue 3 pp. 335-348

FSO system performance analysis based on novel Gamma–Chi-square irradiance PDF model

Jelena Todorović, Petar Spalević, Stefan Panić, Bojana Milosavljević, Milan Gligorijević


free space optical (FSO), Gamma–Chi-square distribution, atmospheric turbulence, pointing error, on–off keying (OOK)


In order to provide a novel analytically traceable free space optics (FSO) channel model for describing turbulence based irradiance fluctuations, following basic scintillation theory principles, we have derived closed-form expression for probability density function (PDF) of a new statistical Gamma–Chi-square model. Further, capitalizing on provided model, error performances of FSO system over on–off keying (OOK) transmission scheme both in the presence of atmospheric turbulence and misalignment fading (pointing error) is investigated. For both cases, the average bit error rate (ABER) at the receiving side of the system is determined in an analytically closed form. The results are graphically presented in order to analyze the impact of different levels of turbulence, as well as other relevant parameters, on the quality of the received signal in the OOK modulated FSO system.

Vol. 51
Issue 3
Article No: 03
pp. 335-348

0.31 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology