Modeling And Simulation Of Marine Surveillance Radar System In Complicated Electromagnetic Environment

With the continuous development of computer simulation technology,it has become the focus of simulation field with the advantages of low cost,fast running speed and extremely high simulation efficiency,and can provide the theoretical basis for the design and system demonstration of radar systems.The maritime surveillance radar,having always been an extremely important component of radar systems,has an extensive application,especially in the military field,sea detection radar and shore-based warning radar being the typical example,which also plays an indispensable role in the civil uses.In this thesis,the overall scheme of the maritime surveillance radar is designed firstly,and then the radar model library is established.The model library of maritime surveillance radar is built under the Visual Studio 2005 platform.The model library can be divided into transmitting model,target model,receiving model,environment model,signal processing and data processing models.Transmitting model includes chirp signal,non-linear frequency modulation signal and phase-coded signal mainly.Target model is mainly made of scattering point information sub-model and echo generation sub-model.Receiving model is composed of receiver noise sub-model,filter sub-model and sensitivity time control sub-model.Environment model is comprised of clutter sub-model,barrage jamming and deception jamming sub-model.Signal processing model is made up of MTI,MTD and CFAR sub-models.Data processing model consists of data measurement and track filtering sub-models.These models in the radar model library are encapsulated as dynamic link library,and the models need to read parameters from the XML table.Finally,it realizes modularization,levelization and standardization of radar models.However,by this modeling way,the interface between the models needs codes to link and the construction is relatively complex.Therefore,in order to make the radar system's building to be more intuitive and convenient,this thesis designs the radar equipment graphical modeling environment software based on the model library of maritime surveillance radar system,and then transplants these models to the graphical modeling software.It mainly realizes the completion of the radar system's building by dragging and linking the graphical models.Secondly,this thesis also introduces the display and control platform of graphical modeling software.It aims to provide users with friendly and convenient interaction with maritime surveillance radar system.At the same time,track information,distance and speed information of the target can get an intuitive expression in the display and control platform.Finally,this thesis evaluates the radar system in complex electromagnetic environment from the aspects of measurement accuracy,anti-jamming improvement factor and sidelobe interference self-defense distance benefit.In this thesis,according to the actual needs of a certain type of radar,the model library of maritime surveillance radar system is established and the radar equipment graphical modeling environment software is designed.Its convenient build mode,user-friendly interface and reasonable simulation results provide a great of help to the research and the scheme design of maritime radar.,which also provides a reference to the fault recovery.Finally,with the display and control platform,we can enable the simulation of maritime surveillance radar system to be more intuitive to realize the visualization of the simulation process.