Implementation of Chirp Scaling algorithm based on space-borne real-time SAR processor
-
摘要: 基于改进的Chirp Scaling算法,提出了一种适用于星上实时信号处理机的高效成像处理实现方法,其核心思想也可应用于其它高分辨率星载SAR的精确成像算法.首先介绍了实时信号处理机的结构,分析了数据处理粒度及其并行流水处理结构.在此基础上,针对单个粒度的成像处理重新设计了算法流程,提出了一种高效的实现方法.利用实时信号处理机,对仿真的回波数据进行了成像处理实验,结果表明:在41 s内能够完成成像处理,成像处理速度和图像质量满足系统设计要求,从而验证了该方法的有效性.
-
关键词:
- 合成孔径雷达 /
- 信号处理 /
- 实时系统 /
- Chirp Scaling算法 /
- 实现方法
Abstract: Based on the refined Chirp Scaling image formation algorithm, an efficient method for real-time processor on space-borne synthetic aperture radar (SAR) was presented. Its key technique is applicable to other precise imaging algorithms for high resolution space-borne SAR. The configuration of the real-time processor was introduced, the granularity of the data being processed and its parallel pipeline structure were analyzed. The processing flow for a single granularity was redesigned, and the efficient implementation method was discussed. Experiments were performed upon the real-time processor using simulated SAR echo data. The whole progress was completed in 41 seconds. The conclusion is that the implementation method is validated by the processing speed and image quality, which meet the requirement of the system. -
[1] 刘永坦．雷达成像技术[M]．哈尔滨:哈尔滨工业大学出版社,1999.20~25 Liu Yongtan．Radar imaging technique[M]．Harbin:Harbin Institute of Technology Press,1999.20~25(in Chinese) [2] 张澄波．合成孔径雷达原理、系统分析与应用[M]．北京:科学出版社,1989.1~37 Zhang Chengbo．Synthetic aperture radar——principle, system analysis and application[M]．Beijing:Science Press,1989.1~37(in Chinese) [3] 魏钟铨．合成孔径雷达卫星[M]．北京:科学出版社,2001.1~22,153~186 Wei Zhongquan．Synthetic aperture radar satellite[M]．Beijing:Science Press,2001.1~22,153~186(in Chinese) [4] 黄 岩,李春升,陈 杰,等．高分辨星载SAR改进Chirp Scaling成像算法[J]．电子学报,2000,28(3):35~38 Huang Yan, Li Chunshen, Chen Jie, et al．Refined Chirp Scaling algorithm for high resolution space-borne SAR imaging [J]．Acta Electronica Sinica,2000,28(3):35~38(in Chinese) [5] 张雄伟．DSP芯片的原理与开发应用[M]．北京:电子工业出版社,2001.1~31 Zhang Xiongwei．Theory and development for DSP chips[M]．Beijing:Publishing House of Electronics Industry,2001.1~31(in Chinese) [6] Analog Devices Inc,TigerSHARC hardware specification ．http://www.analog.com/dsp,2002-03/2004-06 [7] Analog Devices Inc．TigerSHARC DSP microcomputer data sheet ．http://www.analog.com/dsp,2002-02/2004-06 -
点击查看大图
计量
- 文章访问数: 2979
- HTML全文浏览量: 228
- PDF下载量: 954
- 被引次数: 0
下载:
