Design And Implementation Of Signal Processing System For Ship-borne Phased Array Radar

In the modern war mode,the sea war will be the first battlefield,or even the main battlefield in the future.Today's aircraft,missile combat radius is expanding,so how to find long-range enemy targets,master enemy movements,prepare early,take the initiative in the sea war,is one of the key factors to determine the victory of the sea battle in the future.The role of ship-borne air defense warning radar is particularly important.In recent years,in addition to the system innovation in phased array radar,Radar digital signal processing technology and hardware platform technology are developing rapidly,which greatly improving the performance of ship-borne radar.As a key subsystem of radar system,the signal processing system has a very significant impact on overall function and performance of the radar.In this paper,combined with my current project and research topic,the radar signal processing software system is designed and implemented in the background of ship-borne phased array radar system.In the signal processing system,C language is adopt to develop the signal process.The embedded real-time operating system Vx Works is adopt to realize the real-time processing of the radar echo data by using its high-performance wind kernel.Interactive development environment Workbench6.8 is used as compiling and developing platform of software.Power PC architectural signal processing board VPX-Q8640 D is chosen as hardware platform,which integrates four Freescale's latest MPC8640 D processors,and has a high efficiency of computing speed and large capacity data communication capabilities.In this paper,firstly,modularizing the theoretical algorithm,the research is taken in the common signal processing algorithms of ship-borne phased array radar modular by modular.The theoretical basis and algorithm implementation of digital beam forming technology,digital pulse compression technology,Doppler processing technology,constant false alarm detection technology and target azimuth measurement technology are analyzed and deduced briefly.The advantages and disadvantages of each module are analyzed and summarized.Then,according to the signal processing flow of the signal processing system and the functional relationship and information interaction with other subsystems,the system is divided into function of scheduling and control function,target detection function and target information sending function.The scheduling and control module mainly completes receiving and transmitting the radar echo data,radar working parameters,and processing control command;The target detection module mainly completes the functions of digital beam forming,digital pulse compression,Doppler processing,constant false alarm detection,and angle measurement data extraction,azimuth measurement and points cohesion and realize the target distance,velocity and azimuth detection.The target information sending module mainly completes the target trace transmission,the radar working parameter sending and the scanning line sending function.Then,according to system function decomposition diagram of the signal processing on structure and the overall design of the signal processing system,the design of the various functional modules are completed.Design and implementation process of each modules are elaborated through the algorithm analysis and flow graph.Finally,the test cases are listed,and the functional modules and system performance of the system are tested,and the test results are analyzed.Test results show that the functional modules have reached the expected demand,performance also meet the real-time requirements.