Performance Of Wireless Optical Communication Under Sand And Dust Condition

Wireless Optical communication technology(WOC) has been gaining considerable attention since the beginning of last decade. Its numerous benefits have attracted various researchers to this field. However, the challenges cause by weather is a significant factor that must be considered in an attempt to deploy and use a WOC. This research focuses on sand and dust in relation to its impact on Wireless Optical Communication.The scattering effects of the laser signal during atmospheric propagation are studied in details with focus on single and multiple scattering of light. Also, the aerosol properties and absorption in terms of optical signaling impact in atmospheric propagation of laser signals are also studied. The channel model suitable for sand dust is set-up based on log-normal fading channel before the derivation of closed form expression of Bit error rate(BER) and channel capacity.The simulation results of the different modulation scheme used are also presented and the results are analyzed in details. Using the OOK and PPM modulation scheme, the Bit error rate(BER) increased with the existence of atmospheric turbulence and the stronger the turbulence, the worse the BER, besides, the increase of SNR shows that the channel capacity of the system increases.The existence of atmospheric turbulence will cause the increase of BER. Besides, given the same SNR, the stronger turbulence results in worse BER. The average channel capacity of the system, shows that: With increasing of SNR, the channel capacity of the system increases. This means that the turbulence causes the reduction of channel capacity. The average channel capacity increases with transmitting power until it reaches the threshold.