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In the past few decades, the academic research and industrial synergy is dramatically accelerating to conceptualize high data rate services. The congestion in the radio frequency (RF) spectrum has imposed many inherent limitations in the growth of future wireless networks. These limitations have spurred global research activities to open new parts of the electromagnetic wave spectrum. More researches and developments in new modulation schemes, channel modelling and signal processing techniques are yet to be explored. Optical wireless communication (OWC) has appeared as an emerging complementary technology to RF systems. It is deemed as a promising alternative to address RF spectrum congestion and enhance system’s capacity. OWC has gained widespread attention due to its high confidentiality, large spectrum resources and strong resistance to electromagnetic interference (EMI). In this paper …