Research On Disturbed Simulation And Evaluation Method Of Radar Equipment

As an important equipment in modern information warfare,radar can accurately detect the target and judge the enemy’s attack,which is the basis of all combat mission decisions and plays a crucial role in military operations.However,in the modern battlefield,the electronic equipment of both the enemy and ourselves has become increasingly complex,the electromagnetic environment has become extremely complex,and the threat of radar interference has become more serious.Radar combat performance evaluation in jamming environment is the basis of battlefield situation analysis,battle scheduling planning,equipment demonstration and other combat applications,and it is also an issue that commanders at all levels are closely concerned about.Therefore,it is of great significance to study the performance and practical jamming simulation and evaluation method of radar equipment and realize the accurate and objective evaluation of the combat effectiveness of radar after jamming.Shipborne radar and ground-based inverse synthetic aperture radar are taken as the interference analysis objects,combined with their battlefield working environment,the complete process of interference simulation and performance evaluation analysis of these two types of radar equipment is respectively studied,and the specific simulation is given.The main contents are as follows:(1)The radar equations and radar jamming equations of conventional radar and imaging radar ISAR are analyzed,the evaluation criteria and methods of radar equipment jamming are elaborated in detail.The electromagnetic calculation methods such as MLFMA,high-frequency PO and MLFMA-PO hybrid required in radar jamming simulation are introduced,which lays a theoretical foundation for the analysis and evaluation of radar equipment jamming simulation in the following paper.(2)Research on the jamming simulation analysis and evaluation method of shipborne radar.Taking the shipborne tracking radar as an example,starting from the internal interference and external interference of the ship platform,the simulation modeling of its typical working scene is carried out,and the antenna pattern of the tracking radar before and after interference is calculated,based on the electrical performance before and after the pattern is distorted.Based on the changes of the indicators,combined with the established radar performance index system,the performance changes of the radar before and after interference were quantitatively analyzed,and the fuzzy comprehensive index method was used to evaluate the comprehensive performance of the radar after interference,and the performance degradation of the radar after interference was obtained.(3)Research on the jamming simulation analysis and evaluation method of imaging radar ISAR.Taking the ground-based ISAR system as an example,the high-frequency algorithm is used to calculate the electromagnetic scattering characteristics of the detection target(aircraft),and then the Range-Doppler algorithm is used to complete the ISAR imaging of the target.ISAR imaging under different types of interference conditions is studied,and the subjective and objective weighted evaluation model is used to evaluate the interfered ISAR images.On this basis,the changes of the imaging distance and imaging probability index performance of the ISAR system after interference are quantitatively analyzed,so as to complete the evaluation of the ISAR system indicators and judge the degradation of the performance of the entire ISAR system.