Error Probability Analysis of Free-Space Optical Links with Different Channel Model under Turbulent Condition

TL;DR

This paper analyzes the error probability of free-space optical links under turbulent atmospheric conditions using different channel models, focusing on Q-ary PPM modulation and validating results through simulations.

Contribution

It introduces and compares various PDF models for FSO channels under turbulence, providing analytical and simulation-based error probability analysis.

Findings

Different channel models significantly affect SEP performance.

Simulation results validate the analytical error probability calculations.

Q-ary PPM modulation performance varies with turbulence severity.

Abstract

Free space optics (FSO) is a promising solution for the need to very high data rate point-to point communication. FSO communication technology became popular due to its large bandwidth potential, unlicensed spectrum, excellent security and quick and inexpensive setup. Unfortunately, atmospheric turbulence-induced fading is one of the main impairments affecting FSO communications. To design a high performance communication link for the atmospheric FSO channel, it is of great importance to characterize the channel with proper model. In this paper, the modulation format is Q-ary PPM across lasers, with intensity modulation and ideal photodetectors are assumed to investigate the most efficient PDF models for FSO communication under turbulent condition. The performance results are evaluated in terms of symbol error probability (SEP) for different type of channel model and the simulation results confirm the analytical findings.