Simulation Of Guidance Radar System In Complicated Electromagnetic Environment

Guidance radar is utilized to detect and track targets in the battlefield,it also controls the missile flight and intercepts enemy targets.With the development of electronic warfare technology,the guidance radar's working environment is becoming ever more complex,which brings forward higher requirement to the guidance radar's detection and tracking accuracy and anti-jamming capability.At the same time,the rapid development of computer simulation technology has also brought a great convenience to the development of military weapons.Therefore,the computer simulation of guidance radar system under complex electromagnetic environment can not only improve the rationality of radar system design,but also provide a strong basis for the development of weapon system and the evaluation of operational effectiveness of guidance radar system.In this thesis,the requirement analysis of the guidance radar simulation system is carried out,and the working mode of the simulation system is designed with the work tasks of the guidance radar.Combining with the working principle of guidance radar,the working flow and the overall framework of the guidance radar simulation system are designed in which the guidance radar simulation system is divided into the main components of transmitter,antenna,environment echo,receiver,signal processing,data processing and resource scheduling.By the idea of component-based,the main components are divided into independent subsystems base on their functions,and the internal composition structure diagram of the main component module is designed.Then the simulation models of the subsystem module are established combining with the working principle of main components of guidance radar simulation system,and the interface and parameter configuration of the module are designed,by the simulation experiment,the correctness of the model is verified.Next,combining with the principle of jamming generation,the simulation model of the suppressing jamming,deception jamming and smart noise jamming in the complex electromagnetic environment are established,and the feasibility of the model is verified by the simulation experiment.Finally,the simulation and performance evaluation of the guidance radar simulation system under different electromagnetic jamming environments is carried out.In view of the non jamming,suppression and deception jamming scenes,the echo signal received by the guidance radar simulation system,the intermediate processing link and the system detection ability after the anti-jamming measures are analyzed,and data analysis and evaluation are carried out for radar system's detection and tracking accuracy,detection factor improvement and anti-jamming performance.In the environment of smart noise jamming,the echo received by the system is simulated and the jamming effect is analyzed,then the traditional adaptive sidelobe cancellation algorithm and an improved sidelobe cancellation algorithm based on feature space are used to combat smart noise jamming.Comparing and analyzing the simulation results of two sidelobe cancellation algorithms,it is proved that smart jamming is effectively against sidelobe cancellation algorithm,and the sidelobe cancellation algorithm based on the feature space has achieved better cancellation effect than the traditional sidelobe cancellation method,it also converges faster to the optimal interference cancellation ratio.In this thesis,the guidance radar simulation system is modeled by the thought of modularization,and the guidance radar simulation system is simulated under different jamming environments,especially analyzes the cancellation peformance by using different sidelobe cancellation algorithms under the smart jamming environment.Therefore,this thesis has certain reference value for the application of guidance radar in practical engineering.