Radio over FSO link for OFDM based MDM-PDM transmission under different dust environment

In free space optical (FSO) communication, the signal performance is mainly affected by suspended dust concentration in atmosphere. The problem is more severe in urban areas, where dust concentration is generally high due to various construction activities, industrial and vehicular pollution. The main pollutants present in atmosphere are PM2.5 and PM10 which depends on size of pollutant. For various dust concentration, the signal performance is analyzed for BER, Q-factor, received power and SNR etc. A dual MUX configuration with MDM-PDM is implemented to enhance channel capacity and data transmission capabilities. The main objective of this work is to analyze FSO link performance for various attenuation conditions in dust environment and to come up with a best possible solution with enhanced channel capacity and link range. A total 80 Gbps transmission at 1550 nm wavelength is implemented while considering an FSO link range of up to 5000 m under dust conditions.