CA-ECS Algorithm for Squinted SAR Imaging Based on Constant Acceleration Model

SUN Bing; ZHOU Yin-qing; CHEN Jie; LI Chun-sheng

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CA-ECS Algorithm for Squinted SAR Imaging Based on Constant Acceleration Model

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- CA-ECS Algorithm for Squinted SAR Imaging Based on Constant Acceleration Model
- Acta Electronica Sinica Vol. 34, Issue 9, Pages: 1595-1599(2006)
- 作者机构：
  
  北京航空航天大学电子信息工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN957
- Published Online：25 September 2006，
  
  Published：2006
- 稿件说明：
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SUN Bing, ZHOU Yin-qing, CHEN Jie, et al. CA-ECS Algorithm for Squinted SAR Imaging Based on Constant Acceleration Model[J]. Acta Electronica Sinica, 2006, 34(9): 1595-1599.
DOI：

SUN Bing, ZHOU Yin-qing, CHEN Jie, et al. CA-ECS Algorithm for Squinted SAR Imaging Based on Constant Acceleration Model[J]. Acta Electronica Sinica, 2006, 34(9): 1595-1599. DOI：

摘要

针对空载SAR俯冲模式下的高精度运动补偿方法进行研究

推导了恒加速度运动条件下的等效斜视距离模型

基于该模型推导出Extend Chirp Scaling相位补偿因子的数学表达式

提出了一种CA-ECS(Constant Acceleration ECS)算法.该算法的相位补偿因子包含多个方向速度和加速度参数

能够实现恒加速度条件下的运动补偿

是一种通用性强、适用面广的子孔径成像算法.计算机仿真结果表明本文使用的等效斜视距离模型的误差较小

CA-ECS算法能有效地完成加速度运动补偿.

Abstract

This paper concentrates on accurate motion compensation method for airborne SAR in diving model.The equivalent squint range model is deduced in the case of constant acceleration movement and CA-ECS (Constant Acceleration-Extended Chirp Scaling) imaging algorithm is proposed with new phase compensation factors based on this range model.The influences of multi-directional velocities and accelerations are taken into account in phase compensation factors of CA-ECS algorithm

so motion compensation with acceleration can be achieved via phase compensation.This algorithm is a more versatile and applicable imaging algorithm for subaperture data.The computer simulation results illustrate that the squint range model has less error and CA-ECS algorithm can be used to accomplish motion compensation with acceleration efficiently.

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Related Institution

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（电子科技大学电子工程系，）

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