Research On The Effect Modeling Of Electromagnetic Environmental Effects On Radar

Modern warfare is the system countermeasure under the complex electromagnetic environment.On the one hand,the warfare is a system level confrontation,and it presents the characteristics of large scale,large number of combat units,complex topological relations,and changeable operational situation.On the other hand,the electromagnetic environment of human and nature is becoming more and more complex in the battlefield.The influence of the weapon system and equipment operational capability is more and more significant,which decides the outcome of the war directly or indirectly.Modeling and simulation is important ways to study and evaluate the actual combat capability of the weapon system and equipment.The development of modeling and simulation should take system countermeasure and the complex environment into consideration,and this often brings the inherent contradiction between efficiency and precision.Specifically,for the simulation of radar system,how to establish the system which is not only suitable for combat simulation,and can accurately reflect the effect of electromagnetic environment on the influence of the radar system,at the same time with the simulation model of high precision and high efficiency,is the core problem of current radar electronic warfare system simulation and evaluation which need to be solved urgently.Modeling of the effect of electromagnetic environment on radar system is based on the traditional functional level modeling,using analytical and mathematical statistics,the approximate method to establish the corresponding relationship between the external environment and the effect of radar electromagnetic input and output.And it is an effective way to solve the contradiction between the accuracy and efficiency of the model in the system level simulation and evaluation of radar system in complex electromagnetic environment.Aimed at two typical environmental factors of active deception jamming and clutter,this paper presented the modeling method for the effect of radar system.By means of theoretical analysis and experimental statistics,the paper established the model of corresponding simulation and verified the validity and accuracy of the model by simulation.The main content of this paper is divided into four parts:This paper first describes the background and significance of the research,the research status of related problems is introduced in the radar simulation technology,multi false target deception jamming,distance drawing-out interference and MTI/MTD clutter suppression four aspects,and then the main work and the structure arrangement of the full paper are generalized and explained.Then the effect of the multiple false target deception jamming is effect modeled.Multiple false target jamming is mainly embodied in the CFAR(constant false alarm)detection link in the process of searching.According to the detection principle of CFAR,the effect of interference can be quite different when the number of the dry signal and the multiple false targets are different.Based on this inference,the mathematical model of the parameters is established,and the relationship between the number of false targets and the interference effect is derived from the quantitative analysis of the mathematical model.The effect model of parameter value interval and jamming effect is formed.What's more,the influence of the Range gate pull off(RGPO)jamming on the tracking radar is modeled.The basic principle of Range gate pull off(RGPO)jamming is discussed,because there are too many factors in the process of Range gate pull off(RGPO)jamming,it is not easy to establish a precise mathematical model,the relationship between the parameters and results need to simulate the distance drawing-out jamming system,and get the data through the simulation experiment,establish the effect model based on data analysis.In order to simulate the Range gate pull off(RGPO)jamming,the target signals and the enemy's tracking system are respectively analyzed,modeled and simulated.Finally,for the effects of clutter on pulsed Doppler radar(PD),the effect model is set up.Firstly,the working principle of MTI and MTD radar is analyzed,the key parameters are derived from the influence of the clutter on the radar performance.The mathematic model is established and the simplified and precise effect model is established by analyzing the mathematical model.The variation curves of MTI/MTD clutter suppression performance with the influence factors are given,and the mathematical model is simplified,and the error is simulated and analyzed.In this thesis,the method and the theory of the effect model are proposed,and the effect model is established from the three aspects of the multi false target deception jamming and the influence of the clutter on the radar.Based on the actual electronic environment,effect model is simulation modeling.Moreover,considering the effect of multi elements,effect model is accurate.Due to its accuracy of the number range and the effect of the corresponding,effect model can be well applied to the system simulation,reduce the amount of computation,improve simulation efficiency and reduce waste of resources.In addition,links of radar simulation system are numerous,the theory of effect modeling can be applied to many other aspects,so it also has a theoretical reference value.