Research On Tracking Method Of Radar Seeker Head-on Turning Tail Air Target

Maneuvering target tracking is one of the hot topics in the field of radar signal processing.With the increasing maneuverability of all kinds of targets,it becomes more and more difficult to track the targets effectively in real time "Head on to tail pursuit" is a typical escape mode of enemy target in air defense missile operation,which makes the seeker unable to track the target continuously and stably.In this paper,for the linear frequency modulation radar seeker,the echo modeling simulation and tracking method are studied.The main research contents include the following parts:1.Radar basic principle and signal processing method.The main functions of radar system are described from the classification,composition and common measurement parameters of radar;The time-domain and frequency-domain characteristics of common radar signals such as simple pulse,LFM linear frequency modulation,stepped frequency and stepped frequency modulation are analyzed,as well as the signal processing methods such as matched filtering,pulse compression,coherent accumulation and target detection;2.Echo simulation of "head-on to tail pursuit" air target.Combined with the actual scene of data acquisition of a subject,the trajectory model of head-on to tail pursuit in the air is established;On this basis,the radar echo model of LFM signal is constructed;The radar echo simulation of head-on to tail pursuit of air target is completed for two scenarios of radar up view and radar down view respectively;3.Research on target tracking algorithm of "head-on to tail pursuit".In the aspect of maneuvering target motion state modeling,based on CV / CA model and ctrv model,the "head-on to tail" target motion model is constructed;In the aspect of optimal estimation filter,Kalman filter,extended Kalman filter(EKF),unscented Kalman filter(UKF)and interacting multiple model filter(IMM)are analyzed ?-? Finally,the simulation experiments are completed.