Improved Frequency Scaling Algorithm Based on the Range Walk Correction in Time Domain for High Squint Spotlight Airborne SAR

ZUO Wei-hua; PI Yi-ming; MIN Rui

doi:10.3969/j.issn.0372-2112.2013.09.008

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Improved Frequency Scaling Algorithm Based on the Range Walk Correction in Time Domain for High Squint Spotlight Airborne SAR

更新时间：2025-07-16

- Improved Frequency Scaling Algorithm Based on the Range Walk Correction in Time Domain for High Squint Spotlight Airborne SAR
- Acta Electronica Sinica Vol. 41, Issue 9, Pages: 1716-1723(2013)
- 作者机构：
  
  1. 电子科技大学电子工程学院,四川,成都,611731
  2. 怀化学院,湖南,怀化,418000
  3. 电子科技大学电子工程学院,四川,成都,611731
  4. 怀化学院,湖南,怀化,418000
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2013.09.008
  CLC： TN959.3
- Published：2013
- 稿件说明：
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ZUO Wei-hua, PI Yi-ming, MIN Rui. Improved Frequency Scaling Algorithm Based on the Range Walk Correction in Time Domain for High Squint Spotlight Airborne SAR[J]. Acta Electronica Sinica, 2013, 41(9): 1716-1723.
DOI：

ZUO Wei-hua, PI Yi-ming, MIN Rui. Improved Frequency Scaling Algorithm Based on the Range Walk Correction in Time Domain for High Squint Spotlight Airborne SAR[J]. Acta Electronica Sinica, 2013, 41(9): 1716-1723. DOI： 10.3969/j.issn.0372-2112.2013.09.008.

摘要

本文采用时域校正距离走动的方法

对传统频率尺度算法距离压缩进行改进;在方位压缩中

采用非线性调频变标的方法

解决距离走动校正带来的方位向调频率空变性问题.数值仿真实验证明了本文提出算法处理大斜视聚束SAR回波的正确性及有效性.

Abstract

In this paper the range walk correction in time domain is introduced to revise the range compressing of the traditional frequency scaling algorithm.In the azimuth compressing

a method named azimuth nonlinear chirp scaling is involved to solve the azimuth position dependence of the azimuth modulation rate introduced by the range walk correction.The simulation experiments verify the correct and validity of the proposed algorithm in focusing the echo of high squint spotlight SAR.

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