用于合成孔径雷达实时成像的高性能虚拟单节点设计

SAR成像应用对成像速率的要求越来越高，目前单片DSP很难满足要求。如何充分利用多片DSP并行工作仍然是一个难点，针对这一现状，本文为合成孔径雷达成像应用提出了基于TMS320C6678的虚拟单节点设计，能够充分利用多片DSP提供的存储能力以及吞吐能力和处理能力。本文介绍了TMS320C6678芯片的性能，然后提出了基于TMS320C6678 DSP的虚拟单节点系统设计。分析了一种不需要转置就可以进行二维访问的矩阵存储技术，经测试二维访问均达到较高速率。介绍了用于TMS320C6678的一种多核同步技术。在由4片TMS320C6678组成的虚拟单节点上实现了RD算法，测试结果验证了虚拟单节点的优良性能。 

High-Performance Virtual Single-Node Design for Synthetic Aperture Radar Real-Time Imaging

SAR imaging puts forwards higher speed of imaging which can hardly be accomplished by single DSP and how to make multiple DSPs to work in parallel is still a problem. This paper proposes a design called virtual single-node based on TMS320C6678 for SAR applications，which can make full use of the processing capabilities, input-output capabilities and storage capabilities supplied by multiple DSPs. A storage technique is also introduced in this project which can access the two dimensions of a matrix with a high speed according to experimental tests. In this paper, a virtual single-node consisted of four TMS320C6678 applied with Range-Doppler algorithm is achieved, and the effectiveness of virtual single-node design is verified.