Double curved tracks simulation of FSO link for ground-to-train communications in tropical weather

Abstract

As the demand for high-speed broadband data accesses on trains increases, so does the interest in finding solutions to satisfy this demand. Over the last two decades, FSO has gained enormous popularity and has been considered as an alternative to existing fiber and RF communication systems. In this paper, double curved tracks FSO Ground-to-train communications system are proposed, modeled and simulated. Furthermore, the system is simulated under tropical weather conditions, where measured data over 3 years were incorporated in the model in terms of rain, geometrical and fog attenuation. The performance of the system is then analyzed in terms of Received power, Q factor, SNR, and Eye diagram patterns. Weather conditions include; clear weather; heavy rain and fog; light rain and fog. The analysis was performed using both MATLAB® and Optisystem® 14. Results show significant effects of geometrical losses such as beam fading and track clearance. In addition to link performances between first and second track.