Performance Analysis of Coherent Source SAC OCDMA in Free Space Optical Communication Systems

Abstract

In this paper, we investigate the performance of spectral amplitude coding optical code division multiple access (SAC OCDMA) systems under the effect of beat noise and turbulence. Three different multi-laser source configurations are considered in this analysis: shared multi-laser, separate multi-laser, and carefully controlled center frequency separate multi-laser. We demonstrate through Monte Carlo simulation that the gamma–gamma probability density function (pdf) cannot adequately approximate the measured intensity of overlapping lasers and that an empirical pdf is required. Results also show it is possible to achieve error-free transmission at a symmetrical data rate of 10 Gbps for all active users when only beat noise is taken into account by precisely controlling the center frequencies. However, only 30% of the active users can be supported when both beat noise and turbulence are considered.

Leveraging InGaN solar cells for visible light communication reception

“…In the near future, downlink data rates could soar to 20 Gb/s, while uplink rates could reach 10 Gb/s [5]. To address escalating demand, researchers are increasingly investigating light as a communication medium [6][7][8][9].…”

“…In the near future, downlink data rates could soar to 20 Gb/s, while uplink rates could reach 10 Gb/s [5]. To address escalating demand, researchers are increasingly investigating light as a communication medium [6][7][8][9].Free-space optical (FSO) communications, also known as optical wireless communication (OWC), employ light as a wireless communication channel. Recent advancements in communication networks necessitate substantial bandwidth and superior network quality.…”