Real-time Processing Method Of Target Detection And Tracking For Semi-active Narrow Pulse Radar

As an electromagnetic weapon system,narrow-pulse radar can destroy the weapon system in the short range and detect the weapon system in the long range as a radiation source,so it has a broad development prospect in the military field.Therefore,this paper carried out the research on target detection and tracking algorithm,parallel architecture and corresponding software design of semi-active narrow pulse radar,and completed the real-time signal processing of target detection and tracking of semi-active narrow pulse radar.The main research contents of this paper are as follows:(1)first of all,analyses the characteristics of the narrow pulse,and then described in this paper,the semi-active system needs to implement narrow pulse radar target detection,target direction finding,and the principle of target tracking,in view of the traditional twodimensional CFAR cannot meet the real-time requirements of problem,this paper USES a two dimension double threshold constant false alarm detection algorithm,compared with the traditional rectangular window improves the efficiency.(2)The general structure and task requirements of the narrow-pulse radar detection and tracking system are introduced.According to the described task requirements,the appropriate chip is selected and the parallel software architecture is designed.Radar system has many tasks,the traditional single data flow mode or the master-slave mode can not meet the application requirements,this paper adopts the data flow and master-slave mode combined architecture,and on this basis to complete the memory allocation and multi-core communication design.(3)The processing tasks are modularized and corresponding task modules are assigned to each core according to the designed software architecture.The module allocation of each core is analyzed in detail.Using SRIO as the main data transmission method and combining with EMIF to reduce the error rate,the high-speed echo data receiving task and communication task with the subsystem are realized.Multicore data transmission is realized by means of shared memory intercore communication and EDMA.In addition,to solve the crosstalk problem caused by excessive communication data,a data parsing method of double-layer packaging cyclic reading is proposed.