Abstract

Radio on Free Space Optical Communication (RoFSO) provides the solution for increasing day by day demand of high data capacity. In RoFSO, the RF signals carrying information is transmitted through free space using line of sight communication. The major shortcoming in this wireless link is atmospheric turbulence fading. In this paper, we modeled FSO channel using Double Generalized Gamma distribution for the transmission of Orthogonal Frequency Division Multiplexing (OFDM) signals with K-Phase Shift Keying (K-PSK) modulation. Further, we evaluated its performance in terms of Bit Error Rate (BER) for strong, moderate and weak turbulence conditions. Simulation results show that as the order of K-PSK increases, BER performance degrades.

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