Thanks Saloni If possible could you please share the Matlab simulation code you have used, it is taking me time to develop the Matlab code, i do have my data. Im busy with my PhD research looking at the FSO link under South African Weather conditions at the end I will be developing the Intelligence based QoS system that will minimise the effect of this condition. I will share once I’m done. I’m student at Tshwane University in South Africa. I will appreciate your assistance. Regards Solly M