| Radar signal simulation is essentially based on the needs of users,using signal generator to simulate the generated radar echo signal.It has long been popularized in radar system design,testing and maintenance.Different radars have different uses,such as early warning radar for detecting intercontinental missiles and strategic bombers,and exploring warning radar for detecting enemy planes.Therefore,different models should be used to simulate different radars.With the further research of digital signal processing technology,radar signal simulator has combined radar technology with digital signal processing technology.In this thesis,a software system for radar signal simulator is designed,which is mainly based on a number of radar signals and environmental background signals,and the relevant simulation experiments are carried out.Finally,the modules of the whole system are designed and implemented.The contents of the full text are as follows:In this thesis,the significance and development of radar signal simulator are briefly introduced.On this basis,the related theory of radar signal is studied,including linear frequency modulation signal,frequency agility signal,phase coded signal,Rayleigh distributed clutter signal,log positive distribution clutter signal,Webb distribution clutter signal,noise signal and interference signal,etc.And the relevant simulation is carried out by using MATLAB software,which lays a theoretical foundation for the realization of radar signal simulation later.In the study of the key technology of the system,this thesis improves the target distance detection algorithm,and compares it with the similar algorithm in the literature,and proves that the algorithm has more comprehensive detection performance.In the design of the database module,the sampling data is optimized and the direct digital frequency of the later design is reduced.The output spur of the rate synthesizer simplifies the setting of the decision gate in signal demodulation.The software system of radar signal simulator designed in this thesis can realize target detection simulation and signal modulation and demodulation simulation on function simulation.In signal simulation,many kinds of clutter signals,noise signals,interference signals and three typical radar signals and corresponding radar echo signals can be simulated,and the simulation function of the signal simulation can be realized.The generated signals meet the corresponding requirements.At the end of this paper,the signal produced by MATLAB simulation is compared with the signal produced by the system simulation to verify the correctness of the simulator,and the validity of the system data is verified by comparing the measured data with the theoretical values of the system data. |
PDF Full Text Request