Fig. 1. Atmospheric optical system model

Fig. 2. Flow chart of scintillation sequence generation

Fig. 3. Probability density function of double generalized gamma distribution under different turbulence intensities

Fig. 4. Normalized power spectrum under different turbulence intensities

Fig. 5. The scintillation time series in strong turbulence

Fig. 6. Simulation PDF after combining aiming error

Fig. 7. Average bit error rate of system

Fig. 8. Outage probability and SNR of system