Paper Title
PERFORMANCE OF FSO COMMUNICATION SYSTEM WITH DIFFERENT MODULATION SCHEMES

Abstract
Free-space optical communication (FSO) is a technology that uses optical signals to transmit data wirelessly, providing a viable alternative to conventional wired systems. The Free Space Optical (FSO) communication system has emerged as an attractive option due to its large license-free bandwidth, high security, and low cost. It is one of the very promising technologies for wireless communication. However, the sensitivity to weather conditions is a major disadvantage of FSO systems. Atmospheric factors like rain, fog, snow, and dust, can attenuate the optical signals, reducing signal strength and potentially affecting data transmission reliability. The present work focuses on two key performance parameters, Average Bit Error Rate (ABER) and Outage Probability (OP), which are of much importance due to the adverse impact of weather factors on the FSO communication system. For the present study the OP and ABER performance are analysed over Gamma- Gamma (G-G) fading for FSO links in the presence weak and moderate atmospheric turbulence with four different modulation schemes. The CDF functions for the channel model has been derived and MATLAB codes are used to predict the OP and ABER performance for the FSO communication system. Keywords - Free Space Optical communication, bit error rate, Meijer G function, modulation schemes, fading parameter