Performance of hybrid RF/FSO over Gama-Gama Atmospheric Turbulence Channels with pointing error

FSO communication systems links is vulnerable due to degrading effects of atmospheric turbulence and point errors. We present a novel architecture for hybrid radio frequency (RF)/ free space optical (FSO) wireless systems. We investigate the error rate performance of Free-Space Optical (FSO) links over gamma-gamma turbulence fading channels in the presence of pointing error. closed-form expression for BER and ouatge probability of FSO is derived. Another work is a study of how the Outage Probability and BER is affected by the atmospheric turbulence and pointing error.compare the RF outage probability and BER with popular diversity combining schemes(SC) RF/FSO system. Numerical examples are further provided to verify the derived analytical expressions. The results show that offering RF/FSO link provide betterperformance and optimum SNR to reach long distance of link.

کلیدواژه ها:

Diversity schemes ، selection combining ، pointing error ، binary modulation schemes ، Gama-Gama model ، bit error rate (BER) ، and Meijer G-function distribution