Free Space Optical Communication with OOK and BPSK modulation under different turbulent condition

Free Space Optical (FSO) Communications are able to deliver us to an age of unprecedented bandwidth, low signal attenuation, small space requirements and ultimately low cost. In FSO communications the influence of atmospheric effects can be specified by the attenuation and fluctuations of the transmitted optical power, caused by the atmospheric turbulence. This paper investigate the bit error rate (BER) performance of FSO communication systems employing on-off keying (OOK) and subcarrier binary phase-shift keying (BPSK) modulation in turbulence regimes from weak to strong, In addition, we try to compare the BER performance of FSO communication systems employing subcarrier BPSK and OOK as modulation technique.