Abstract
Free Space Optics (FSO) uses air as a medium of transmission of signals and requires Line of Sight (LOS) for operation. Communication systems that employ FSO have gained prominence in recent times and have been used in mobile communications, broadcast, security, and other applications. They have proven a worthy substitute for fibre optics albeit with some notable disadvantages. FSO systems are usually installed above ground level and are therefore exposed to the prevailing atmospheric conditions which can negatively affect the optical signal. Tropical regions exhibit adverse weather conditions such as rain, fog, and haze that can affect FSO signals. There is a dearth of research on the use of FSO systems in tropical regions and on methods to mitigate the effect of FSO signal interference. In this research, we propose diversity techniques to improve the link performance of FSO systems in a tropical region. The simulation results indicate a better Bit Error Rate (BER) and Signal-to-Noise Ratio (SNR) compared to other techniques.
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