Fig. 1. Average BER of BPSK system with changing w_z/a value

Fig. 2. Average BER of non-adaptive BPSK system varying with σ_s value

Fig. 3. Influence of light intensity fluctuation variance on average BER of non-adaptive BPSK system

Fig. 4. Spectral efficiency of adaptive MPSK system under Gamma-Gamma distribution

Fig. 5. Spectral efficiency of adaptive MPSK system under different turbulence distributions

Fig. 6. Influence of beam waist radius and jitter standard deviation on average BER of adaptive MPSK system

Fig. 7. Influence of modulation order on average BER of adaptive system

Fig. 8. Outage probability of adaptive MPSK modulation