Design And Implementation Of Simulation Software For Space Laser Communication System

With the development of information technology,it is very important and necessary for countries all over the world to obtain information control.Compared with other wireless communication methods,space laser communication has the advantages of wide communication bandwidth,large information capacity,strong anti-interference ability,high communication reliability and good confidentiality,so it has become an important way of space broadband information transmission.However,the environment of space laser communication is very complex,the risk of satellite development is high,and the investment is large,so it is necessary to establish a simulation model of space laser communication system and study its performance in all aspects before carrying out on orbit laser communication experiment.At present,there is no special simulation software for the simulation of space laser communication system.There are mainly numerical simulation software,special simulation software for optical fiber communication system and space optical network simulation software on the market.According to the current demand of space information transmission,this paper analyzes the function of space laser communication system simulation software,designs the overall architecture and functional modules of the simulation software,studies the implementation method of space laser communication system simulation software,completes the development of space laser communication system simulation software,and tests the usability of the simulation software.The main work and achievements of this paper are as follows1.The composition of the space laser communication system was studied and the system simulation model was designed.The working principle,space environment,key technologies and simulation modeling theory of space laser communication system were studied,and the simulation model of space laser communication system was established,including optical transmitting system model,optical receiving system type,space optical channel model,visualization device model and APT system model.2.The functions and general framework of the simulation software were designed,and the database technology,design model,hybrid programming technology,Qt technology,event-driven and time-propelled joint simulation technology for space laser communication system simulation software implementation were studied.The development of human-machine interface module,file management module,database module,resource management module,topology management module,parameter setting module,system simulation module and performance analysis module was realized.3.The development of space laser communication system simulation software was completed,and the software was tested.The simulation test of the LEO satellite laser communication system was completed,and the results showed that the higher the transmitting optical power,the better the performance of the system.