Journal of Multi Disciplinary Engineering Technologies, Vol. 14, Issue 1

Paper Title: Comparison of OOK, BPSK, QPSK, 8-PSK and PAM-16 for Optical Wireless for Weak Atmospheric Turbulence

Authors: Archit Arora , Karan, Priyanka Bhardwaj

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Abstract: In free space optical communication, the effect of atmospheric turbulence, which causes fluctuations in received optical power, is inevitable. Based upon inhomogeneity in refractive index, the atmospheric turbulence can be classified into weak, moderate and strong turbulence. In this paper, analysis of FSO link for various modulation schemes such as OOK, BPSK, QPSK, 8-PSK and PAM-16 is carried out for Log-normal channel model (weak turbulence). BER is plotted with respect to SNR. Further, it is deduced that PAM-16 modulation scheme is better for overall range of SNR (-5 to 20 dB) considering log irradiance variance (l 2) greater than 0.56

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