On Irradiance Distributions for Weakly Turbulent FSO Links: Log-Normal vs. Gamma-Gamma

TL;DR

This paper compares log-normal and Gamma-Gamma models for irradiance fluctuations in weak turbulence FSO links, demonstrating that Gamma-Gamma provides a more accurate fit based on experimental data.

Contribution

The study provides experimental evidence that the Gamma-Gamma distribution outperforms the traditional log-normal model in weak turbulence conditions.

Findings

Log-normal model fails to accurately describe irradiance fluctuations.

Gamma-Gamma model offers a better fit to experimental data.

Experimental results support using Gamma-Gamma for weak turbulence modeling.

Abstract

Weak turbulence is commonly modeled using the log-normal distribution. Our experimental results show that this distribution fails to capture irradiance fluctuations in this regime. The Gamma-Gamma model is shown to be more accurate.