An Approach of Ground Moving Target Motion Parameter Estimation for Airborne Sidelooking SAR System

ZHU Sheng-qi; LIAO Gui-sheng; QU Yi; ZHOU Zheng-guang; LI Hai

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An Approach of Ground Moving Target Motion Parameter Estimation for Airborne Sidelooking SAR System

更新时间：2025-07-16

- An Approach of Ground Moving Target Motion Parameter Estimation for Airborne Sidelooking SAR System
- Acta Electronica Sinica Vol. 38, Issue 12, Pages: 2757-2762(2010)
- 作者机构：
  
  西安电子科技大学雷达信号处理重点实验室,陕西,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN959.73
- Published：2010
- 稿件说明：
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ZHU Sheng-qi, LIAO Gui-sheng, QU Yi, et al. An Approach of Ground Moving Target Motion Parameter Estimation for Airborne Sidelooking SAR System[J]. Acta Electronica Sinica, 2010, 38(12): 2757-2762.
DOI：

ZHU Sheng-qi, LIAO Gui-sheng, QU Yi, et al. An Approach of Ground Moving Target Motion Parameter Estimation for Airborne Sidelooking SAR System[J]. Acta Electronica Sinica, 2010, 38(12): 2757-2762. DOI：

摘要

针对距离向速度估计中存在的模糊问题

提出一种利用目标距离包络的走动轨迹

通过Radon变换技术来无模糊地估计距离向速度的方法.针对距离向加速度影响方位向速度估计问题

提出了利用目标多普勒参数来估计运动目标真实合成孔径时间

通过真实合成孔径时间与方位向速度的关系来确定目标方位向速度.该方法能很好估计方位向速度而不受距离加速度的影响.所提方法适合于单/多通道系统.仿真和实测数据验证了方法的有效性.

Abstract

A novel algorithm is presented to solve the ambiguity problem of across-track velocity estimation for moving targets in airborne sidelooking SAR system.In this method

the across-track velocity can be unambiguously estimated according to the slope calculated by Radon transform of the profile extracted from the echo’s range walk trajectory.In order to solve the problem the along-track velocity estimation is influenced by the across-track acceleration

we propose a new along-track velocity estimation approach.The along-track velocity can be obtained by the real synthetic aperture time (synthetic aperture length) of target.Proposed methods can be applied to both single- and multi-channel SAR systems.The validity and practicability are verified by the simulated and real measured data.

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