Research On Signal Processing Algorithm And Simulation Of X-band Multifunctional Phased Array Radar

Multifunctional phased array radar is favored because of its excellent characteristics.It has the ability to change beam pointing quickly and flexibly,and supports multiple working modes.Nowadays,radar simulation system based on computer simulation technology has the advantages of low cost,short research period and high efficiency,and it can be approximated to the real-world environment for digital simulation,it is an important method for algorithm verification,optimization,and evaluation of radar systems.The multi-function phased array radar simulation system supports multiple functions such as target detection,tracking,identification,interception,etc.This article focuses on the search and tracking mode of multi-function phased array radar,studies and analyzes the signal generation and processing process,implements the radar simulation system on the VS platform,and extends the real-time interactive performance of the radar simulation system to achieve the radar processing Intervention control.First,the working process of multifunctional phased array radar in different modes,the overall framework of the system is constructed,and the design and implementation of the simulation system are introduced in a macroscopic way.Secondly,aiming at the three important modules in the simulation system,antenna array,signal generation and processing,the key technology modeling analysis and simulation verification are performed.The traditional density-weighted and iterative Fourier algorithm-based array algorithms are compared,and the improved iterative Fourier algorithm is used for antenna arrays to achieve a pattern with low sidelobe and narrow beam width.Based on the analysis of the full-path propagation process of the radar signal and related simulation verification,a radar signal receiving model was established.Theoretical analysis and simulation verification are performed on the key links in the signal processing process of the radar in various working modes,including phase compensation,pulse compression,multi-pulse accumulation,constant false alarm detection(CFAR),ranging and angle measurement models,etc.,and the Keystone transform algorithm is used to solve the problem of distance walking with multi-pulse accumulation.Finally,after the analysis and verification of the above theoretical model,the radar simulation system is constructed on the software platform.The simulation system simulates the working process of the radar,in the same time,uses a fixed communication format for other display and control platforms to support users' manual intervention and control of radar processing status.Multi-threading is used to realize the parallel operation of radar processing and network communication,which improves the system's scalability and data interaction capabilities.Based on the design idea of C / S,the radar simulation system is used as the server,and other display and control platforms are used as clients.The simulation system obtains the manual instructions and data information of the display and control platform through UDP communication,adjusts the radar task arrangement according to the instructions,and the processing result is fed back to the display and control platform,realizing the real-time display and control function of the simulation system and manual intervention control.