Real-time Simulation Of Radar Clutter In Complex Scenes

With the efforts of radar workers in past dynasties,the performance of radar-related products is improving day by day.At the same time,it also puts forward higher requirements for clutter simulation.In view of the huge economic value,military value and the variability of electromagnetic environment in the coexistence area of various clutter types,such as landwater combination,urban-rural boundary,large-scale artificial scattering points,etc.,clutter simulation for such scenes is increasingly becoming an important target and hotspot direction of clutter simulation topics in the future,and is also a difficult work in the field of clutter simulation.This paper focuses on the fast simulation of radar clutter in complex scenes where multiple types of clutter coexist.Based on the complex Gaussian clutter model,this paper presents a complex scene clutter simulation method in which the shape parameters can be non(semi)integers.In this paper,DSP+FPGA architecture is used to complete the construction of a high-speed analog board that meets the needs of generating,processing and transmitting a large amount of clutter data.Combined with relevant software design,a fast clutter simulation system is formed,which supports the traditional clutter model based on a single statistic and complex Gaussian clutter models such as K distribution and Pareto distribution.Test results show that the system has good performance.In order to solve the problem of complex clutter characteristics in complex scenes,this paper firstly studies the clutter composition types in complex scenes,and briefly introduces the characteristics of sea clutter,ground clutter and meteorological clutter.The existing complex scene clutter modeling methods are analyzed emphatically,and the relevant applicable characteristics,advantages and disadvantages are summarized.Based on the limitation of the traditional complex Gaussian clutter simulation shape parameter values,a corresponding solution is proposed.A large number of simulation experiments prove that the solution effectively solves the problem that the complex Gaussian clutter model shape parameter values are(half)integers,and improves the precision probability of complex scene clutter simulation.In this paper,a detailed simulation flow of complex scene clutter data is given to complete complex scene clutter modeling based on composite Gaussian.In order to solve the problem that the simulation speed of clutter in complex scenes is too slow,this paper designs a high-speed simulation board with high-performance DSP processor TMS320C6678 as the core.FPGA and other related components are built into the simulation board.its superior processing performance supports the real-time simulation,processing and transmission of large quantities of clutter data.Based on SYS/BIOS clutter simulation algorithm in complex scenes,a variety of real-time optimization techniques available in the algorithm design process in this paper are proposed to effectively improve the real-time performance of the system.According to the actual situation of highperformance multi-core processors,combined with complex scene clutter simulation tasks,a reasonable scheme design is given.Finally,based on the system designed in this paper,each module is tested and verified.The SRIO communication of the data transmission module and the accuracy and real-time performance of complex Gaussian clutter simulation data such as clutter generation module K and Pareto are mainly tested.Based on IPIX measured data,the feasibility of the system in simulating sea clutter and ground clutter coexisting in coastal complex scene is verified.