Design And Implementation Of Low-speed And Small Radar Data Processing System Based On Multi-core DS

In recent years,the types and numbers of low-altitude aircraft have increased,but due to the lack of relevant laws,safety accidents have occurred frequently.Therefore,real-time monitoring of low-altitude and slow-speed small targets such as drones can effectively prevent the illegal behavior of low-altitude aircraft,and is of great significance to ensuring people’s peace of mind and maintaining national security.Aiming at the characteristics of low flying height,slow speed and small reflection crosssectional area of low-altitude and slow-speed small targets,the thesis designs and implements a low-altitude slow-speed small target detection radar data processing system based on TMS320C6678.The specific research work of the thesis is as follows:Firstly,the thesis introduces the basic concepts in the process of radar data processing,summarizes the basic flow of radar data processing,gives the project scheme and design requirements;Secondly,the thesis completed the design of radar data processing algorithm flow,and carried out simulation for the data preprocessing,data interconnection,tracking filtering and other links involved in the system.In the data preprocessing link,aiming at the characteristics of low altitude and slow small targets,such as low flight height,small reflection cross-sectional area and easy to be submerged by clutter,etc.In this thesis,a dynamic clutter pattern filtering method based on velocity segmentation is adopted to effectively shield the lowaltitude environmental clutter,and the velocity segmentation strategy improves the signal to noise ratio of the target trace and the accuracy of the subsequent trace condensation.In correlation link,in view of the low slow the characteristics of the small target speed is slow,thesis adopted increase stopped walking model of nearest neighbor domain correlation algorithm,stop walking motion model is more close to the target’s actual motion way,to identify the target that may occur during the process of maneuvering flight,the algorithm effectively reduced to a low slow small target tracking error;Finally,this thesis describes the design of the whole radar data processing system from the aspects of general module and multi-core scheme design,and tests and validates it.Finally,through the multi-core software module test based on DSP and the overall joint debugging of the low-altitude slow-speed small target detection radar system,the real-time performance and accuracy of the entire radar data processing system are verified.