多核DSP上的ISAR实时成像技术研究

为了提高逆合成孔径雷达（ISAR）实时成像的性能，本文首先设计了一种基于TMS320C6678多核信号处理器（DSP）的高速实时信号处理平台，优化了功耗的同时提高了信号处理能力。其次，本文提出了一种利用窄带测量信息进行成像条件判断、成像数据选择和指导高速运动补偿的实时成像流程，并通过将该流程分割成几个独立的任务，在分析任务的实时性和任务间的通信的基础上，完成了任务在多核DSP上的分配。利用本文平台对实测数据进行处理，并将成像性能和实时性与单核DSP信号处理平台做对比，进一步验证了多核信号处理平台的处理优势和算法设计的合理性。 

Research on ISAR Real-time Imaging Technology Using Multicore DSP

Aiming at improving the performance of Inverse Synthetic Aperture Radar(ISAR) real-time imaging, a high speed real-time signal processing platform based on TMS320C6678 Multicore Digital Signal Processor(DSP) is proposed to improve the capability of signal processing besides optimizing the power consumption. Moreover, this paper presents a real-time imaging flow in which narrow-band information has been used for image-forming condition deciding, imaging data selection and high velocity signal compensation guidance. We decompose the flow into several independent tasks, and distribute them among multi cores according to the time cost of tasks and communications between tasks. Experiment results evaluated on real data verify the superiority of multicore signal processing platform and effectiveness of algorithm design by comparing the imaging and real-time performance to the results obtained by signal processing platform with single-core.