Research On Target Dynamic Tracking Method Based On Anti-jamming Technology

With the increasingly complex battlefield environment,it has become a trend to continuously expand the functions of radar.This article first studies the traditional target tracking technology,and on this basis,proposes a dynamic parameter optimization target tracking technology.Then the radar anti-jamming technology is studied,on this basis,a hybrid anti-jamming method combining random phase and orthogonal coding is proposed.Combining the two,the target tracking radar with anti-jamming capability is realized,thereby expanding the function of the pulse Doppler radar.The main content of the paper includes:The monopulse angle measurement technology and trajectory filtering principle are studied.First,the traditional monopulse angle measurement technology is studied.To solve the problem of high algorithm complexity in the traditional speed estimation method,a method for estimating speed based on the target moving amount is proposed.This method has strong engineering practicability and is used to estimate the target speed and realize the movement correction of the signal,and to verify its effectiveness by simulation;then introduces the traditional trajectory filtering principle,which is not conducive to the tracking of moving maneuvering targets due to the fixed parameters of the traditional filter.A target tracking method with dynamic parameter optimization is proposed.The parameters of the filter are analyzed and processed,and then the smoothing coefficient of the filter is dynamically updated,thereby dynamically changing the convergence speed of the filter and tracking the targets with different maneuvering capabilities at different convergence speed,And simulation to verify that the filter parameter error is reduced.Finally,the practical problems encountered in the single-pulse angle measurement tracking test and the solutions are discussed.The orthogonal coding anti-jamming technology is studied,and a method of inter-pulse mixed-phase anti-jamming is proposed.Then,for the problem that the traditional anti-jamming technology is not effective in combating strong interference signals,the anti-jamming method of hybrid phase and orthogonal coding is proposed.Interference technology,this method is to use multiple sets of orthogonal coding to achieve range anti-interference.Since the jammer cannot know all the encoded signals and their transmission order,the interference signal cannot obtain gain through the distance pulse pressure,and the method of using interphase pulse mixed phase To achieve azimuth anti-interference,add high-order phase and random phase to the multiple pulse signals transmitted in a parity order.Similarly,because the jammer cannot obtain the added phase information,the interference signals are not coherent in the azimuth direction and cannot be obtained 向 gain.Through the anti-jamming technology of mixed phase and quadrature coding,the two-dimensional anti-jamming technology of range and azimuth is realized.Finally,the research of target tracking method based on fusion anti-jamming technology is to combine the proposed anti-jamming method with target tracking technology to ensure that the tracking radar can still work normally in complex interference environment.The simulation verifies that in the interference environment,it can achieve stable tracking of multiple targets;and in the environment of multiple interference sources,it can achieve good tracking of targets.Finally,set up simulation environments with different interference ratios to verify the anti-jamming performance of the target tracking radar.