Coded BPSK OFDM-FSO over Strong Turbulence Channel

Free space optical (FSO) communication has become a research area of interest in the domain of optical communication in recent years. However, atmospheric turbulence plays a significant role in degrading its performance. Orthogonal frequency division multiplexing (OFDM) has been considered to enhance the performance of the FSO system. The aim of this paper is to investigate the performance of Binary Phase Shift Keying (BPSK) OFDM-FSO communication system by employing a convolutional coding scheme over the atmospheric (Gamma-Gamma) turbulence channel. Results presented show that the uncoded BPSK modulation scheme offers the system poor error rate but enhanced with convolutional coding technique.