SBX Radar Simulation Research

The missile defense system protect national security as a solid "shield".It is also the focus of research for many scientific and technical personnel.As an important part of the missile defense system,SBX radar(Sea-based X-band Radar)is of great significance to national defense construction.The SBX radar is an X-band broadband sea-based radar with a phased array antenna module as the hardware core.And it conducts airspace detection,identification,guidance,and lethal assessment of long-range ballistic missiles.Due to the complexity of the SBX radar system,the development cycle is long and the implementation cost is high.In order to reduce the unnecessary cost of SBX radar’s system implementation,computer simulation is very necessary for SBX radar’s system.This thesis focuses on the SBX radar simulation research,analyzing and simulating the overall working mode and composition of the system,and completes the computer simulation of high-speed moving targets.It mainly including the function-level simulation of target detection and the signal-level simulation of ISAR imaging.In order to solve the problem of low target detection efficiency at radar simulation of the signal level,function-level simulation is implemented for the target detection based on the Neyman-Pearson criterion.Echo coherent processing and keystone algorithm are used to complete ISAR imaging of high-speed moving targets.The main research content can be summarized into the following three aspects:1.Aiming at the low efficiency of target detection and related signal processing of SBX radar at radar simulation of the signal level,this thesis uses functional level simulation to improve the system signal processing efficiency,and optimizes the target signal-to-noise ratio based on the equivalent pulse compression theory.Then,this thesis completes the detection of the target by using Neyman-Pearson detection criteria and line-of-sight judgment.Finally,measuring distance and angle of the target are obtained by analyzing a series of measurement errors.2.Aiming at the problem of ISAR imaging blurring caused by the broadening and offset of the range spectrum of ballistic missiles under high-speed motion and the distance migration of uniform rotating motion,ISAR imaging of this thesis mainly includes two aspects,on the one hand is the broadening and offsetting of the range-based spectrum caused by the speed and acceleration of the target under high-speed motion,and on the other hand is distance migration problems caused by uniform rotating motion.For the first hand,parameter estimation based on least squares fitting method and echo coherent processing are completed to compensate for the echo of high-speed moving targets,and for the second hand,using keystone algorithm solves distance migration caused by rotating motion.Finally,the two-dimensional ISAR imaging result of the high-speed moving target under the uniform rotating motion is obtained.3.Using Visual Studio software develops the SBX radar simulation system software.the software content can be introduced by in three parts.Firstly,the thesis explains the overall system architecture.then analyzes the specific functions of each module of the system,and completes the system simulation software implementation based on the SBX radar system theory.Finally,the SBX radar system is tested by combing the simulation parameters,and the simulation results are compared with the theoretical data processing results to verify the correctness of the system software.