BER Analysis of 60GHz Millimeter Wave over Free Space Optical Communication System

Free Space Optical (FSO) communication link under clear weather conditions is affected by irradiance fluctuations caused due to random atmospheric temperature variations. In this work, bit error rate (BER) performance of free space optical (FSO) communication link is analysed. A 60 GHz millimeter wave is generated using frequency quadrupling technique and transmitted via free space optical (FSO) communication link. Different atmospheric turbulence conditions such as weak, moderate and strong are observed for FSO channel and corresponding simulation results have been obtained. Channel models such as Gamma-gamma model for strong atmospheric turbulence conditions and Log normal model for weak to moderate turbulence are considered to evaluate system bit error rate (BER). Further, BER performance is analysed for certain parameters such as transmitter antenna aperture diameter, receiving antenna aperture diameter, beam divergence and optical wavelength used.