航空学报 > 2001, Vol. 22 Issue (S1): 80-83

条带模式合成孔径雷达回波数据的聚束成像算法处理

孙进平, 洪文, 柳重堪, 毛士艺   

  1. 北京航空航天大学电子工程系 北京 100083
  • 收稿日期:2000-05-10 修回日期:2000-09-03 出版日期:2001-11-25 发布日期:2001-11-25

SPOTLIGHT PROCESSING OF STRIPMAP SAR DATA

SUN Jin-ping, HONG Wen, LIU Zhong-kan, MAO Shi-yi   

  1. Departmetn of Electronic Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2000-05-10 Revised:2000-09-03 Online:2001-11-25 Published:2001-11-25

摘要:

对条带模式SAR和聚束模式SAR的关系进行了研究,给出了一种如何利用聚束成像算法来处理条带模式SAR的原始回波数据的方法,这种方法基于两种模式成像处理器输入数据的不同特点和Dechirp解调原理,同时使用了频谱扩展的方法。在没有聚束模式SAR原始回波数据的情况下,可使用本文的方法利用条带SAR数据来模拟聚束SAR数据,以便研究聚束成像算法。此外在条带 SAR成像过程中,利用文中给出的算法,可以对某一小的目标区域进行精细成像。也可将此方法用于条带SAR的快视成像中。

关键词: 合成孔径雷达, 成像算法, 聚束模式

Abstract:

This paper presents a method for processing stripmap SAR data by using spotlight imaging algorithms. This method is based on dechirp demodulation and different characters of input data of stripmap and spotlight IFP. A frequency unfolding approach is also used. Spotlight data can be simulated by using this approach, and spotlight imaging algorithms can be studied when spotlight data aren't accessible. Furthermore, this approach can also be used in super resolution and quick look imaging formation.

Key words: synthet ic aperture radar, imaging algo rithm, spo t ligh t made