Abstract
The Li-Fi system is being considered as an excellent alternative to the RF in the wireless network for the past few years due to its many benefits. Free space optics (FSO) is a type of communication where the light signal is sent over an unguided and unlimited path. Atmospheric attenuation, such as scintillation and weather or meteorological conditions, are critical characteristics affecting the reliability and quality of Li-Fi systems. This study extensively examined and simulated the atmosphere attenuation with various conditions and evaluated the influence of these conditions on different laser beam wavelengths. The performance of a proposed outdoor Li-Fi system based on all-optical OFDM to transmit 640 Gbps generated from eight orthogonal channels under the attenuated modelled channel situations was tested and analyzed. The system demonstrated a decent performance with BER at approximately 6 × 10−4 and received a signal of − 35 dBm for 10 Km and significant turbulence. VPI photonics design package and MATLAB were utilized to evaluate the system performance and channel modeling.
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