Error Estimation Method for Distributed Small Satellites in the Configuration for SAR-GMTI

XU Qing; LIAO Gui-sheng; ZHANG Juan; YANG Zhi-wei

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Error Estimation Method for Distributed Small Satellites in the Configuration for SAR-GMTI

更新时间：2025-07-16

- Error Estimation Method for Distributed Small Satellites in the Configuration for SAR-GMTI
- Acta Electronica Sinica Vol. 39, Issue 4, Pages: 848-853(2011)
- 作者机构：
  
  西安电子科技大学雷达信号处理国家重点实验室,陕西,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN957.51
- Published：2011
- 稿件说明：
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XU Qing, LIAO Gui-sheng, ZHANG Juan, et al. Error Estimation Method for Distributed Small Satellites in the Configuration for SAR-GMTI[J]. Acta Electronica Sinica, 2011, 39(4): 848-853.
DOI：

XU Qing, LIAO Gui-sheng, ZHANG Juan, et al. Error Estimation Method for Distributed Small Satellites in the Configuration for SAR-GMTI[J]. Acta Electronica Sinica, 2011, 39(4): 848-853. DOI：

摘要

针对合成孔径雷达(SAR)成像、地面动目标检测(GMTI)功能的实现

分布式小卫星的最佳构型为沿航向分布

但误差的存在会使性能下降.提出了一种基于距离脉压后时间－方位多普勒域回波数据的分布式小卫星误差估计方法.通过距离向脉压

提高了信噪比

采用预先估计并补偿幅度误差的方法

克服了幅度误差与沿航向位置误差的相互影响.仿真结果表明

与传统方法相比

本文方法收敛速度加快

估计精度得到提高.

Abstract

To realize the function of the synthetic aperture radar (SAR) image and ground moving target indication (GMTI)

the along-track array is the best configuration for the distributed small satellites.However

array errors significantly degrade the performances.An estimation method based on the data in compressed range time and azimuth Doppler domain is given.In the proposed method

the range pulse compression is used to improve the signal to noise ratio.And the gain error is corrected before the other error estimations which avoids the interaction between the gain error and the along-track position error.Computer simulations show that the convergence rate of the proposed method is quickened with the estimate accuracy improved

compared with the conventional method.

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Related Author

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LI Tian-chi

ZOU Zheng-feng

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Related Institution

National Key Laboratory of Radar Signal Processing, Xidian University

College of Electronic Information and Automation， Civil Aviation University of China

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Xi'an Electronic Engineering Research Institute

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