Research On Simulation And Processing Technology Of Near-field Target Echo Signal

Laser fuze and radio fuze have narrow beam and high positioning accuracy.They are two kinds of proximity fuze widely used in modern missiles.However,laser fuze is susceptible to natural interference such as clouds,radio fuze is susceptible to artificial interference such as chaff.The laser and radio compound detection system can greatly improve fuze anti-jamming ability.In this paper,laser and radio compound fuze is taken as the research object.The simulation and processing technology of near-field target echo signal of compound fuze is studied through target modeling and bin subdivision,bin occlusion and blanking,RCS and echo signal calculation,and target recognition algorithm.The main work is as follows:The method of target surface model construction and data analysis based on bin method was studied,the principle of subdivision of the triangle bin and the target model management software were proposed.Based on the laser and radio compound fuze detection field model,a bin occlusion and blanking algorithm under local illumination conditions was improved and verified by simulation.The calculation methods of target LRCS and echo power were studied.The simulation software for near-field target echo signal of laser detection system was developed,which realized the echo signal calculation of typical targets under various intersection conditions.The calculation methods of target RCS and doppler signals were studied,and target recognition algorithm based on frequency domain constant false alarm rate was designed.The simulation software for near-field target echo signal of radio detection system was developed,which realized the calculation of target echo signal and target recognition.Based on the near-field target echo signal simulation computer,FPGA+ARM development board and the fuze-warhead coordination simulation computer,the simulation and processing technology verification platform of the near-field target echo signal was built.The compound fuze target recognition algorithm was implemented in the FPGA+ARM development board.