Radar Data Processing Implementation Based On Low, Small And Slow Targets

Based on a frequency-scanning radar project,a set of data processing algorithm of radar software and display-control software for low and slow targets were designed in this paper.The main work includes the following:This paper first introduces the theoretical algorithms of radar data processing,which mainly include the point aggregation method,track starting algorithm,linear filtering algorithm,and single target tracking and multi-target tracking algorithms in track interconnection algorithm.It mainly introduces the modified logic method and modified Hough transform algorithm at the beginning of the track,the Kalman filter algorithm in the linear filtering,the NNSF algorithm and the modified PDAF algorithm in the single-target interconnection,and the suboptimal JPDA algorithm in the multi-target interconnection.And the above algorithms were analyzed by simulation.Then the data processing design of low,small and slow targets based on the frequency-scanning radar system is introduced,and solutions are proposed for the problems encountered in the experiment.It introduces the search and tracking strategies for low,small and slow targets respectively,and focuses on the adaptive gate tracking method for tangential movement of targets in the tracking strategy.It also introduces two improved multi-beam specific angle measurement methods,and uses the measured data to carry out a simulation comparison analysis.Then for the maneuvering motion of this type of target,based on the traditional turning model and the current statistical model,an improved turning model and an improved CS model algorithm are designed,and an interactive multi-model filtering algorithm is introduced.Simulation analysis is performed using simulated data and radar measured data;Then,for the divergence problem of linear filtering,a solution to suppress its divergence is proposed,and simulation analysis is performed for various situations;A clutter map strategy is also designed for low-altitude complex clutter environment;At the same time,in order to speed up the rapid withdrawal of false targets,the SPRT cancellation algorithm and cost function cancellation algorithm are introduced,and the two algorithms are simulated and analyzed.Finally,according to the engineering requirements,the design of data processing software and display control is completed on the QT platform using C ++ language.Through joint tuning experiments with the frequency sweep radar,the verification of the clutter suppression strategy,target maneuver tracking algorithm and filtering algorithm designed in the data processing software to improve the accuracy of target measurement is completed.According to the experimental results,it is verified that the data processing software can achieve high-precision tracking of low,small and slow targets.