用ADSP21062高速信号处理系统实现机载SAR实时成像处理器的方位向处理  

USING ADSP21062 BASED HIGH-SPEED SIGNAL PROCESSING SYSTEM TO IMPLEMENT AZIMUTH PROCESSING OF REAL-TIME IMAGER FOR AIRBORNE SAR

作　　者：禹卫东[1] 吴淑梅[1] 

机构地区：[1]中国科学院电子学研究所,北京100080

出　　处：《电子与信息学报》2002年第8期1143-1147,共5页Journal of Electronics & Information Technology

摘　　要：机载SAR实时成像处理器可以在载机飞行的同时获得高分辨率的SAR图像,对于实时监测、军事侦察等应用具有重要意义。实时成像处理器就是用高速数字信号处理系统来实时地实现SAR的成像算法。该文介绍SAR实时成像处理器方位向处理部分的研制,该部分采用了自行开发的、基于ADSP21062的高速信号处理系统,8片ADSP21062被安排在4个并行处理通道中,具有960MFLOPS的峰值处理速度,优化的软件设计保证了硬件资源的利用效率。仿真测试和外场实验证明了该系统的设计是成功的。该文对方位向处理部分的实现原理、硬件结构、软件设计进行了详细介绍。Real-time Imager can provide Synthetic Aperture Radar(SAR) image in real-time mode which is significant for airborne SAR applications such as real-time monitoring and battle reconnaissance. A SAR real-time imager usually implements SAR imaging algorithms with high-speed DSP system. This paper describes a high-speed DSP system based on ADSP21062 to realize azimuth processing with range-Doppler algorithm, consisting of range migration correction and azimuth compression. 8 ADSP21062s are organized in 4 parallel processing blocks in this system achieving a processing speed of 960MFLOP. Elaborate software programming ensures a high efficient utilization of hardware. Experimental simulation and field flight indicate this system is successful. The principle architecture, hardware implementation and software design are presented in this paper in details.

关 键 词：ADSP21062 机载SAR 方位向处理 合成孔径雷达 实时成像处理器 数字信号处理 

分 类 号：TN959.73[电子电信—信号与信息处理] TN911.72[电子电信—信息与通信工程]