Research On The Anti-Jamming Decision Mechanism Of Radar Detection Based On Game Theory

In recent years,with the development of adaptive jamming technology,radar is faced more and more complex electromagnetic environment and more and more serious jamming problems in modern electronic warfare.In the complex and changeable combat environment,it is not easy for radar equipment to fully identify the jamming strategy adopted by the enemy jammers,so it cannot make effective anti-jamming decisions quickly and win the initiative in the war.Game theory is a method that can choose the most beneficial strategy for oneself without knowing the strategy adopted by the other party,and the confrontation between radar and jammer is a kind of game,so,this thesis studies the anti-jamming decision-making mechanism of radar with the help of game theory,and solves the problem of radar anti-jamming strategy selection under uncertain conditions.This thesis designs one-to-one and one-to-many game confrontation model between the radar and the jammer for the scenario where a single high-power jammer and multiple lowpower jammers implement suppressive jamming of radar,and the radar’s hybrid anti-jamming optimal strategy is obtained.Firstly,in order to solve the problem that a quantitative index is needed to solve the radar anti-jamming strategy based on game theory,this thesis proposes an improved ECCM improvement factor(IEIF).The proposed IEIF and the maximum detection range of the radar satisfy a linear relationship.Secondly,for the one-to-many confrontation scenario,aiming at the problem of different combat performance of jammers,this thesis studies the method of combining and weighting the jammers in the distributed jamming system based on game theory,which overcomes the one-sidedness of the subjective and objective weighting method.At the same time,this thesis uses anti-jamming technology and jamming technology as game strategy,IEIF as benefit to establish adversarial matrix,and uses nash equilibrium theorem as constraint to find out the hybrid anti-jamming optimal strategy and optimal IEIF of radar.Finally,according to the linear relationship between the IEIF and the maximum detection distance of the radar,the radar detection range under different conditions is obtained by simulation.The simulation result verifies that under the condition of facing the adversarial matrix established in this thesis,the thesis obtains the optimal strategy of hybrid anti-jamming based on game theory.