Real Time Processing Method Of Muti System Forward Looking Imaging

The forward-looking imaging technology of mobile platform is an important branch of radar imaging field.In recent years,scholars at home and abroad have proposed different forward-looking imaging algorithms based on different imaging configurations,but most of them have a huge amount of computation,which leads to the fact that the system processing time cannot meet the requirements of real-time performance and cannot adapt to the transformation of imaging systems.In this paper,based on the project background,choose three different imaging system,and the amount of calculation is relatively appropriate forward-looking imaging algorithm for project implementation,the three imaging system of forward-looking imaging algorithm in the real-time imaging system of integration in the same,to adapt to the transformation of imaging system,and focus on the system based on DSP signal processing in the design and implementation of the part.The improvement is mainly made from three aspects: overall system design,DSP software parallel architecture design and software engineering implementation,so that the imaging effect of the signal processing system is better and the real-time requirements are met:1,ship targets on the sea are expounded respectively,agile targets on the ground and the ground fixed target forward-looking imaging algorithm principle,according to the characteristics of the variety of forward-looking algorithm design front imaging system,the hardware resources reasonable allocation algorithm in the process of determining the working process of the system,and analyze the key problems in signal processing,put forward the relevant design train of thought,It lays a foundation for the design of DSP software architecture.2.In order to solve the problems of DSP signal processing system complexity,many tasks difficult to assign and so on,and to meet the requirements of real-time,DSP software multi-core parallel architecture adopts the master-slave structure.The design of the programming method is based on the SYS/BIOS operating system for the master core,and the bare computer for the slave core.On this basis,the operating system and the bare computer are configured respectively in memory,and the multi-task threads of the main core are configured.The multi-thread scheduling mode is designed,and the multi-core synchronization mode is designed as hardware semaphore synchronization.3.According to the designed software architecture and the flow of each forward-looking algorithm,the tasks and processing flow of each chip are reasonably configured.In order to solve the problems of low code implementation efficiency and large amount of computation in the engineering process of the forward-looking imaging algorithm,different degrees of optimization are carried out from the perspectives of DSP compiler,code and algorithm.Finally,the correctness and real-time performance of the signal processing system are verified by the playback test of data acquisition.