Optimal Algorithm For Stagger Codes Of Staggered MTI Cascaded MTD Filter Banks

The main function of radar is to detect the location of the target through the electromagnetic wave scattered by the target.However,all kinds of impurities,such as land,ocean and atmosphere,will also scatter the radar signal,so that the target echo and the external clutter will enter the radar receiver together.If the clutter signal is strong or exists in slices,the target signal will be submerged,resulting in erroneous detection and affecting the radar's ability to detect targets.Therefore,in order to improve the detection ability of radar,clutter processing is needed.How to effectively suppress clutter,expand the "blind speed" and optimize the stagger code become the core task of this thesis.Another core task of this thesis is to build a wide area distributed node radar simulation platform,including the introduction of the four tier architecture,module encapsulation,multi task decomposition and call.In view of these two parts,the main work of this thesis is as follows:Firstly,the clutter characteristics are analyzed,and the performance index of clutter suppression is clearly defined.The traditional MTI clutter suppression delay canceller is introduced and analyzed.Then two commonly used filter design methods are introduced:block and sliding window,and then analyzes the two commonly used filter optimization methods,which are eigenvector method and zero assignment method.A single-notch and multi-notch filter is designed for ground clutter,cloud-rain clutter and chaff clutter,and simulation experiments and performance analysis are carried out.Research on stagger code optimization algorithm of stagger MTI cascade MTD.Firstly,the characteristics of stagger MTI,the principle of blind speed expansion,and the design method of the filter banks of MTI cascaded MTD are introduced in the thesis.On the basis of the above theory,the genetic algorithm based on binary coding is presented in detail to find the optimal stagger codes of MTI cascaded MTD filter banks.Through the simulation analysis of single-notch,multi-notch,block design and sliding window design,we can see that the algorithm can get the optimal stagger code quickly,extend the blind speed to three times the speed of sound,and suppress clutters effectively.Aiming at the construction of the wide-area distributed node radar simulation platform,this paper briefly introduces the design objectives and application prospects of the wide-area distributed node radar simulation platform,and then analyses in detail the four-tier architecture of the simulation platform: the general data node layer,the special signal processing layer,the general data processing layer and the application service layer.The module encapsulation of the special signal processing layer and the general data processing layer is completed.The parallel simulation of multi-task is realized on the wide-area distributed node radar simulation platform,which lays the foundation for future engineering application.