Performance Analysis of Optical-SAR Cooperative System Based on Mutual Information

The current research on optical-SAR cooperative work mainly focuses on the fusion of optical and SAR images, while there are fewer studies on how the optical and SAR sensor can cooperate optimally for targets survey. In this paper, mutual information is employed as the evaluation metric of optical-SAR cooperative system. Firstly, the optical-SAR cooperative system is modeled according to imaging principles. Then the mutual information expression of the optical-SAR cooperative system is derived with the stochastic process theory. Finally, through simulation, the relationship between the mutual information of the cooperative system and the target detection probability is analyzed to verify the validity of the mutual information as the performance evaluation metric of the cooperative detection system.