1. Kedar, D., Arnon, S.: Urban optical wireless communication networks: the main challenges and possible solutions. IEEE Commun. Mag. 42(5), S2–S7 (2004)
2. Henniger H., Wilfert, O.: An Introduction to free-space optical communications. Radio Engineering, 19 (2) (2010)
3. Duvey, D., Gupta, R.: Review paper on performance analysis of a free space optical system. Int. J. Appl. Innov. Eng. & Manag. IJAIEM 3(6), 135–139 (2014)
4. Andrews, L. C., Philips R. L., Hopen, C.Y.: Laser Beam Scintillation with Applications. SPIE Optical Engineering Press, Bellingham, WA
5. Ghassemlooy, Z., Popoola, W., Rajbhandari, S.: Optical Wireless Communications System and Channel Modelling. CRC Press Taylor & Francis Group, pp.378 (2013)