可扩展机载SAR信号处理机的研究

合成孔径雷达（SAR）信号处理的数据量和计算量都很大，对信号处理机来说是一个巨大的挑战。可扩展的信号处理机可以提供给处理机一种较好的持续性能，但处理机的扩展性会因硬件结构和软件规划的不同而呈现出不同的效果，必须从硬件和软件多方面作综合考虑。本文从任务规划、数据传输模式和处理单元的拓扑结构等三方面对可扩展实时并行SAR信号处理机进行了分析研究。提出一种可扩展实时并行SAR信号处理机方案。该方案基于DSP、通用计算机和实时Linux操作系统，具有通用性、可扩展性、可编程性和可实现性，较好地平衡了处理机性能与灵活性之间的矛盾。

Research of Scalable Processor for On-Board Airborne SAR

Synthetic aperture radar (SAR) signal processing poses a significant challenge due to its very large computation and data storage requirement. The scalable signal processor can persistently provide better performance. But the structure of hardware and the plan of software will greatly influence the scalability, so the hardware and the software should be carefully considered. This paper discusses the scalable real time parallel SAR processor from task planning, data transmitting mode and topology structure of computation unit, and proposes a scheme of real time parallel SAR processor. Based on a general computer, DSP and real time Linux operation system, the scheme has scalable,universal,programmable and realizable properties, and offers a good balance of performance and flexibility.