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 hgh-speed signal processing system to implement azimuth processing of real-time imager for airborne SAR
-
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。Abstract: 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.
-
Wu C, et al., Modeling and a correlation algorithm for spaceborne SAR signals, IEEE Tran. on AES., 1982, AES-18(5), 563-574.[2]禹卫东,合成孔径雷达信号处理研究,[博士论文],南京,南京航空航天大学,1997,第四章.[3]禹卫东,吴淑梅,距离多普勒方法中的几种插值算法比较,电子与信息学报,2001,23(3),308-312.[4]吴淑梅,禹卫东,ADSP2106x信号处理板的开发设计,电子技术应用,1999,25(12),53-55.[5]禹卫东,方位压缩处理和距离迁移校正,中科院电子所研究报告,1998,10.[6]禹卫东,吴淑梅,ADSP2106x中DMA的应用,电子技术应用,2000,26(6),69-72. -
计量
- 文章访问数: 2127
- HTML全文浏览量: 48
- PDF下载量: 541
- 被引次数: 0
下载:
