Analysis and Compensation of Equivalent Phase Center Error in MIMO-SAR

WANG Li-bao; XU Jia; HUANGFU Kan; PENG Ying-ning

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Analysis and Compensation of Equivalent Phase Center Error in MIMO-SAR

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- Analysis and Compensation of Equivalent Phase Center Error in MIMO-SAR
- Acta Electronica Sinica Vol. 37, Issue 12, Pages: 2688-2693(2009)
- 作者机构：
  
  1. 国防科技大学电子科学与工程学院,湖南,长沙,410073
  2. 清华大学电子工程系,北京,100084
  3. 国防科技大学电子科学与工程学院湖南长沙,410073
  4. 清华大学电子工程系北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN957
- Published：2009
- 稿件说明：
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WANG Li-bao, XU Jia, HUANGFU Kan, et al. Analysis and Compensation of Equivalent Phase Center Error in MIMO-SAR[J]. Acta Electronica Sinica, 2009, 37(12): 2688-2693.
DOI：

WANG Li-bao, XU Jia, HUANGFU Kan, et al. Analysis and Compensation of Equivalent Phase Center Error in MIMO-SAR[J]. Acta Electronica Sinica, 2009, 37(12): 2688-2693. DOI：

摘要

受等效相位中心误差的影响

多输入多输出合成孔径雷达(MIMO-SAR)方位成像结果存在"假峰"而导致成像质量下降.基于MIMO-SAR回波模型

本文推导了等效相位中心误差的解析表达式

并定量研究其对方位成像质量的影响.分析指出周期性的二阶相位误差是等效相位中心误差的决定因素

补偿该项误差能有效克服"假峰"的影响.理论分析和数值试验验证了本文分析和补偿方法的有效性.

Abstract

Due to the equivalent phase center error

the imaging quality of the Multiple-Input Multiple-Output synthetic aperture radar (MIMO-SAR) may be degraded with a series of "spurious peaks" in the cross-range direction.Based on a proposed model of MIMO-SAR

this paper derives the analytic expressions for the equivalent phase center error

and its influence on the imaging quality is studied.It is shown that the periodical quadratic phase error is a key factor in the equivalent phase center error

and its compensation may effectively overcome the "spurious peaks".Finally

both theoretical analysis and the numerical experiments are provided to demonstrate the effectiveness of the proposed analysis and compensation methods.

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