Channel models for optical wireless communication systems

We present an up to date review of various channel models used for optical wireless communication systems so far. Various channel models for both indoor and outdoor optical wireless communication systems are examined. For indoor environment different configurations of transmitter and receiver positions are discussed. For outdoor environment, the factors affecting the link performance such as atmospheric turbulence are investigated in terms of channel modelling. Finally, both the indoor and outdoor channel models are respectively compared in terms of computation speed, complexity and accuracy of performance.