Study on Effects of Line Coding and Power Variations on the Uplink Scheme of 8-Channel WDM-FSO HAP for 5G Applications

This study discusses the Wavelength Division Multiplexing-based Free-Space Optics (WDM-FSO) communication system over HAPs for 5G applications. It aims to evaluate the potential of this system in meeting the need for reliable 5G connectivity. Through simulations using OptiSystem, the research explores the implementation of HAPs with a focus on uplink connectivity between ground stations and HAPs. The study examines the influence of line coding, transmission power, atmospheric conditions, and altitude on the Log-Bit Error Rate (Log-BER) and system quality factor (Q-Factor). The results show that RZ line coding is effective in altitude variations, while NRZ is better in weather variations. Power variations do not show significant changes in line coding. This research illustrates the potential of WDM-FSO technology on HAPs to support reliable wireless connectivity in the future.