Modeling And Simulation Of Radar Complex Electromagnetic Environment

With the wide application of information technology in military field,electromagnetic environment has become the core environmental factor of informationized battlefield,which has a great impact on radar system.The real electromagnetic environment is complex,dynamic and invisible.At the same time,it is expensive and difficult to simulate electromagnetic environment for radar system by using electronic equipment in kind and in half-in-kind,and shooting range experiment also needs a lot of manpower and material resources.It is a good research approach to construct an equivalent complex electromagnetic environment in the form of modeling and simulation.Therefore,we use a full-digital modeling and simulation method by computer and the C++ object oriented language technology to complete the construction and development of the complex electromagnetic environment in which the radar systems are located,and design the electromagnetic environment scene of the radar system,accomplish the analysis and evaluation of the scene.The composition and current situation of the complex electromagnetic environment in which the radar systems are located is analyzed first in this thesis.Then we focus on the research and analysis of the jamming of the electromagnetic environment of the radar system and the generation mechanism,characteristics and implementation steps of the radar echo.It has been applied and validated in the construction of the electromagnetic environment scene of the subsequent radar system.In order to make the simulated signal be applied in engineering with certain fidelity,a more detailed workflow analysis is added,which explains the working process of the simulation more clearly.For the jamming signals,we mainly discuss the mathematical model and simulation process of suppressing,deceiving,smart jamming and chaff jamming.The simulated jamming patterns are diverse and widely used,with practical application value of modeling and simulation.For radar echo simulation,we construct single scattering point target echo,multi-scattering point target echo,sea clutter,meteorological clutter and ground clutter to read the target echo model and update in real time with external measurement data.And the time-space correlation is taken into account in the construction of sea clutter.Finally,the construction of electromagnetic environment scenes are implemented and the corresponding process analysis and evaluation of the design and development scenarios are carried out.The construction of radar electromagnetic environment scenarios is signal level,which can simulate and verify the electromagnetic environment using the obtained complete echo signals.And this thesis makes up for the defects that in most scenarios it is not possible to obtain complete signals by simulation.All the models and scenarios constructed in this thesis adopt the object-oriented idea of C++.The model is regarded as an object for design and development,which makes the logic and hierarchy clearer,improves the reusability and portability of the model,and shortens the secondary development cycle when it needs to be improved and updated.At the same time,the built model is used to simulate the scene of the real combat environment.On the one hand,the scene can be constructed according to the real combat environment,and on the other hand,the scene can be improved by modifying and adding the model when the electromagnetic environment changes in the scene,which makes the simulation electromagnetic environment more complete,improves the fidelity of simulation modeling,enhances the applicability,and has certain engineering application value.