一种全实时SAR方位向数字预处理滤波器的设计  

DESIGN OF A REAL-TIME SAR AZIMUTH DIGITAL PREPROCESSING FILTER

作　　者：陈冰冰[1] 王贞松[1] 张晓振[2] 李明峰[2] 

机构地区：[1]中国科学院计算技术研究所,北京100080 [2]中国科学院电子学研究所,北京100080

出　　处：《计算机研究与发展》2002年第8期1012-1016,共5页Journal of Computer Research and Development

基　　金：国家自然科学基金重大项目基金资助 ( NFNS6 9896 2 5 0 -2 )

摘　　要：利用机载 SAR方位向预处理的基本原理 ,巧妙地将方位向 FIR滤波和降采样相结合 ,从而提出了一种SAR方位向预处理实时快速算法的 VL SI结构 .并利用 HDL语言将该结构综合在了一片大规模 CPL D上 ,得以硬件实现 .外围辅助其它单元电路 ,研制成功了面向地学的高分辨率机载 SAR方位向预处理分机 .经过使用证明 ,该分机可以适用于多种波段的机载 SAR系统 。This paper introdces a real-time fast algorithm for the SAR signal preprocessing from the classical FIR in-out equation. It combines azimuth filtering with desampling and results in a special VLSI architecture for the real-time preprocessing of airborne SAR signal. The architecture is synthesized into a large scale CPLD and occupies about 56 percent of 10000 logic gates. With the peripheral function module together, a real-time preprocessing of SAR signal subsystem is built. This subsystem has been fully tested by the real X band airborne SAR flying experiment in Xi'an in Sept. 2001 and L band airborne SAR ground simulative system. These experiments show that the filter and the subsystem have sound adaptability for different SAR systems. The results are satisfactory.

关 键 词：SAR 方位向数字预处理 滤波器 设计 合成孔径雷达 方位向预处理 

分 类 号：TN958[电子电信—信号与信息处理]