基于多DSP的毫米波SAR实时快视处理软件设计

发布时间：2018-04-14 10:00

本文选题：SAR + TMS320C6678　；参考：《西安电子科技大学》2015年硕士论文

【摘要】：合成孔径雷达(Synthetic Aperture Radar,SAR)具有全天候、全天时、远距离成像和高分辨率成像等特点,在军事和民用领域得到了广泛应用。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,毫米波高分辨SAR的实时成像的实现成为了研究的新热点。本文重点论述了基于TI DSP TMS320C6678的机载毫米波高分辨SAR实时快视处理软件设计,针对机载毫米波高分辨SAR处理数据量大、处理过程复杂的特点,采用协处理板+阵列处理板基于多DSP进行实时成像处理,具有极强的信号处理能力。信号处理板上加入了交换芯片,解决了多板、多DSP之间的数据交换,充分展示了DSP强大的数据处理能力以及其接口广泛实用性。首先介绍了距离-多普勒算法(Range--Doppler,RD)的基本原理,着重介绍了基于惯导的运动补偿处理。然后介绍了设计中所使用的硬件,简述了处理板上重要的芯片TMS320C6678,详细介绍了所用信号处理板卡(协处理板+阵列处理板)的结构,说明了信号处理系统中板卡间的接口联系。然后详细阐述了多板间、多DSP间、多核间的算法映射及软件实现,并给出了外场实验中实测的实验结果。实验结果表明多核DSP的处理完全满足高实时性的要求,而且具有较高的精确度。最后针对多DSP间程序调试困难的情况,详细描述了SAR实时快视调试软件设计,并结合多次调试结果,验证整个调试软件的性能,实验证明调试软件大大方便了多DSP间的程序调试。
[Abstract]:Synthetic Aperture radar (SAR) has been widely used in military and civil fields for its characteristics of all-weather, all-day, long-range and high-resolution imaging.With the development of digital signal processing technology and synthetic aperture radar imaging algorithm, the realization of millimeter-wave high-resolution SAR real-time imaging has become a new research hotspot.This paper focuses on the design of real-time fast view processing software for airborne millimeter wave high resolution SAR based on TI DSP TMS320C6678. Aiming at the characteristics of large amount of data and complex processing process of airborne millimeter wave high resolution SAR processing,The coprocessing board array processing board is used for real-time imaging based on multi-DSP, which has strong signal processing ability.A switch chip is added to the signal processing board, which solves the data exchange between multi-board and multi-, and fully demonstrates the powerful data processing ability of DSP and the wide practicability of its interface.The basic principle of Range-Doppler algorithm Range-DopplerRD) is introduced firstly, and the motion compensation processing based on inertial navigation is emphasized.Then the hardware used in the design is introduced, the important chip TMS320C6678 on the processing board is briefly described, the structure of the signal processing board (co-processing board array processing board) is introduced in detail, and the interface connection between the boards in the signal processing system is explained.Then, the algorithm mapping and software implementation between multi-board, multi- and multi-core are described in detail, and the experimental results in the field experiment are given.The experimental results show that the multi-core DSP processing can meet the requirements of high real-time performance and has high accuracy.Finally, in view of the difficulty of debugging the program between multiple DSP, the design of the debugging software of SAR real-time and fast view is described in detail, and the performance of the whole debugging software is verified by combining the debugging results of many times.The experiment proves that the debugging software greatly facilitates the program debugging between multiple DSP.
【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】：2015
【分类号】：TN957.52

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