Performance Evaluation of FSO System under Atmospheric Turbulence and Noise

Free space optical (FSO) communication systems can be the only solution to transmit high-speed data in urban areas wireless networks. FSO communication systems are more suitable for 5G point to point communications. Performance of FSO communication systems is well-determined based on the type of modulation techniques employed as well as signal propagation under various atmospheric conditions. Proposed work is focused upon evaluating performance of FSO systems that employed OOK, BPSK, MPSK M-QAM modulation techniques in transmitters and antenna diodes (APD) in receivers. Analysis of proposed FSO communication system is carried out considering an atmospherically turbulent gamma channel model and normal (turbulence free) channel model in the case of weak/medium and strong air turbulence in air channels. The Bit Error Rate (BER) of the proposed FSO system is estimated based on various parameters like APD quantum noise, intensity of the turbulence, thermal noise of system, back ground loss, channel attenuation, link distance, etc. © 2022, The Institution of Engineers (India).