Prediction Algorithm of Key Design Parameters for Space Chaotic Optical Communication System

Space laser optical communication has been widely investigated to achieve high bit rate information transmission. To enhance the information transmission security in space laser optical communication, chaos-based encryption scheme is adopted. It involves many parameters in designing a space chaotic optical communication system, which a proper tuning of them brings good communication performance. To investigate the key design parameters including the masking efficiency, transmitting optical power and mismatch coefficient, we give the calculation model of the bit error ratio (BER) based on traditional space laser optical communication system from the perspective of the authorized receiver and eavesdropper. Numerical results indicate that the BER for the eavesdropper is sensitive to the masking efficiency but not to the transmitting optical power. By contrast, the transmitting optical power plays a crucial role in the computational formula of the BER for the authorized receiver. A saturate optical power is also proposed at last which helps save the energy. These simulation results can be reference for practical system design.