Outage Performance of Free-Space OpticalCommunication Systems Over Turbulent Channels with Varying Atmospheric Visibilities

Abstract

Free space optics is the technology where beams of light provide
optical connection using a line-of-sight path for communication as a
form of video, voice, and data information between two points. A few
of the FSO system's limitations include atmospheric attenuation
caused by weather, which is the most difficult issue to solve because it
seriously impairs system performance and results in poor signal
transmission. One of the important performance measures for
analyzing and enhancing FSO functionality for various fading states
associated with different data rates is outage probability. This article
examines FSO in terms of transmission optical power, feasible bit
rates, and outage probability under clear, hazy, and moderate to
heavy rainy conditions. The MATLAB simulation is implemented to do
the performance study. However, aperture diameters D = {20, 40, 80,
100} mm and link distances L = {2.0, 3.5, 5.0} mm are seen to be
essential characteristics for evaluating system performance. For all
scenarios, the system's power consumption can be minimized by
using larger aperture diameters at lower bit rates, particularly in clear
weather.