Signal Processing And Simulation Of Adaptive Array Seeker Radar

With more and more high-tech equipment serving on the troops and battlefields,as well as the great threat posed by stealth aircrafts and more and more complicated environment,it is imperative to increase the success rate of intercepting enemy targets by the missile seeker.Considering the great advantages of phased-array technology,such as the ability to achieve detection and tracking performance of multiple targets,strong anti-electromagnetic radiation interference and so on.As a result,the combination of phased-array radar technology,multi-channel array technology,and seeker technology has become a hot topic at home and abroad to increase the accuracy of precise-guidance.In order to evaluate the guidance performance effectively,researchers often use computer technology to set up system models and conduct simulation.This technology above can not only establish combat airspace of the missile-guidance system,verify its performance,but also greatly increase its cost-effectiveness.At the same time,the simulation result can reference for the offensive and defensive drills on the battlefield.This paper focuses on system modeling and dynamic real-time simulation of the phased-array seeker radar,and the main contents include the following points:1?Introduce basic principles of the phased-array seeker radar and describe the modeling framework,system simulation workflow.Considering its array model and seeker antennas,the array element model is analyzed and established.Meanwhile,the corresponding sub-array-level signal model is built in several typical sub-array partitions.2?Aiming at waveform designation of the seeker radar system,the LFM signal?low side-lobe phase-encoded signal and PSK/FSK signal are discussed.Also their characteristics of ambiguity function and Doppler tolerance are analyzed and explained.Meanwhile,the comparison and simulation experiments are conducted.Focusing on the modulation of PSK/FSK mixed signal,how the relationship between the frequency gap and the sub-band bandwidth can influence distance resolution improvement effectively is studied.3?None adaptive processing and STAP under strong clutter environment of the array seeker radar's echo signal are researched.Focusing on the study of regular and irregular array STAP processing,the formulas of dimension reduction STAP algorithm are deduced.The measurement of target angle is discussed,simultaneously simulation experiment is performed and its results are given.Also the performance of target angle measurement by the monopulse sum-differential beam phase ratio under different scenes is compared.4?The strategies and algorithms in the course of target searching,tracking filtering,and guidance controlling of the phased-array seeker radar are discussed.For the typical combat scenarios,the system-level real time guidance simulation experiments are carried out on the case of target's uniform motion,maneuvering and other states.The simulation results are given,also they are analyzed and discussed.