基于多片TMS320C6678的SAR斜视实时成像实验与实现

发布时间：2018-04-10 20:29

本文选题：合成孔径雷达 + TMS320C6678　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：合成孔径雷达(Synthetic Aperture Radar,SAR)应用广泛,大量应用于军事领域和民用领域。随着数字信号处理技术和合成孔径雷达成像算法的不断发展,对合成孔径雷达回波信号进行实时处理,并实现高分辨率的实时成像成为了研究的新热点。本文重点研究了基于多片TMS320C6678斜视实时成像的实验与实现。简述了SAR成像算法,为满足大斜视成像的实时性处理要求,我们以基于FPGA和多片多核DSP的硬件系统来进行算法实现。文章对多核DSP的SAR成像算法进行了设计。首先是对DSP的八核算法进行并行化设计,包括如何实现核间通信,任务协调分配等;其次是方案中的内存管理,包括CMD文件内存资源声明、分配以及内存对齐;然后是SYS-BIOS应用,包括SYS/BIOS与传统嵌入式系统区别,SYS/BIOS线程调度,XDCTools工具和SYS/BIOS内存配置等;最后是代码优化以及编程技巧,包括CCS中的语言特性、程序设计举例和工程组成。文章对多片DSP实时成像系统进行了设计。首先是介绍项目中应用的信号处理板卡,包括板卡整体结构和链接拓扑;其次是对数据传输和应用接口进行设计,包括车载数据流设计、机载数据流设计;然后是对处理板上的算法进行设计,包括FPGA算法结构设计、DSP算法结构设计;然后是对中断应用进行设计,包括DSP中断系统的结构和原理以及在项目中的应用;然后是介绍项目中内存资源的管理和分配;然后是对项目中应用的高速传输接口的传输性能进行检测,按照算法的要求对各个接口进行分配组合,并对数据传输的正确性进行验证;然后是时间测算及效率分析,包括车载方案时间测算和机载方案时间测算;最后是结果验证,包括车载方案结果验证和机载方案结果验证。
[Abstract]:Synthetic Aperture radar (SAR) is widely used in military and civil fields.With the development of digital signal processing technology and synthetic aperture radar imaging algorithm, real-time processing of synthetic aperture radar echo signal and realization of high-resolution real-time imaging have become a new research hotspot.This paper focuses on the experiment and implementation of real-time imaging based on multi-chip TMS320C6678 strabismus.In order to meet the real-time processing requirements of large squint imaging, the SAR imaging algorithm is implemented in a hardware system based on FPGA and multi-core DSP.In this paper, the SAR imaging algorithm of multi-core DSP is designed.The first is the parallel design of the eight accounting methods of DSP, including how to realize the communication between cores, the coordinated allocation of tasks and so on; secondly, the memory management in the scheme, including CMD file memory resource declaration, allocation and memory alignment, and then the SYS-BIOS application.It includes the differences between SYS/BIOS and traditional embedded systems, such as SYS / BIOS thread scheduling tool and SYS/BIOS memory configuration, and finally, code optimization and programming techniques, including language characteristics in CCS, program design examples and engineering composition.A multi-chip DSP real-time imaging system is designed in this paper.Firstly, it introduces the signal processing board used in the project, including the whole structure of the board and the link topology, and then designs the data transmission and application interface, including the on-board data stream design and the airborne data flow design.Then the algorithm on the processing board is designed, including the FPGA algorithm structure design and the interrupt application design, including the structure and principle of the DSP interrupt system and its application in the project.Then it introduces the management and allocation of memory resources in the project, and then detects the transmission performance of the high-speed transport interface applied in the project, and allocates each interface in accordance with the requirements of the algorithm.The correctness of the data transmission is verified; then the time calculation and efficiency analysis, including the onboard scheme time measurement and airborne scheme time calculation; finally, the result verification, including vehicle scheme results verification and airborne scheme results verification.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.52

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