Range Ambiguity Resolving Method for High-Resolution and Wide-Swath Imaging with FDA-SAR

WANG Cheng-hao; LIAO Gui-sheng; XU Jing-wei

doi:10.3969/j.issn.0372-2112.2017.09.005

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Range Ambiguity Resolving Method for High-Resolution and Wide-Swath Imaging with FDA-SAR

更新时间：2025-07-16

- Range Ambiguity Resolving Method for High-Resolution and Wide-Swath Imaging with FDA-SAR
- Acta Electronica Sinica Vol. 45, Issue 9, Pages: 2085-2091(2017)
- 作者机构：
  
  1. 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
  2. 信息感知技术协同创新中心,陕西,西安,710071
  3. 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
  4. 信息感知技术协同创新中心,陕西,西安,710071
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61231017);China Postdoctoral Science Foundation (No.2016M590925);Fundamental Research Funds for the Central Universities (No.XJS16009, No.JB160228)
- DOI：10.3969/j.issn.0372-2112.2017.09.005
  CLC： TN957.51
- Published Online：25 September 2017，
  
  Published：2017
- 稿件说明：
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WANG Cheng-hao, LIAO Gui-sheng, XU Jing-wei. Range Ambiguity Resolving Method for High-Resolution and Wide-Swath Imaging with FDA-SAR[J]. Acta Electronica Sinica, 2017, 45(9): 2085-2091.
DOI：

WANG Cheng-hao, LIAO Gui-sheng, XU Jing-wei. Range Ambiguity Resolving Method for High-Resolution and Wide-Swath Imaging with FDA-SAR[J]. Acta Electronica Sinica, 2017, 45(9): 2085-2091. DOI： 10.3969/j.issn.0372-2112.2017.09.005.

摘要

由于多普勒模糊和距离模糊的制约，星载合成孔径雷达（SAR）成像方位高分辨率和宽测绘带成像之间存在严重的矛盾.针对这一问题，该文提出了基于频率分集阵列（FDA）SAR系统的高分辨宽测绘带成像距离解模糊方法.该方法基于FDA的距离维可控自由度，利用FDA发射导向矢量的距离和角度二维依赖性，在空间频率域实现距离模糊回波的分离并对不同距离模糊区域分别进行成像处理，解决了星载SAR成像测绘带宽对方位高分辨率的制约问题.仿真实验验证了所提方法的正确性和有效性.

Abstract

In space-borne synthetic aperture radar (SAR)

severe conflicts exists between azimuth high resolution and wide swath due to Doppler and range ambiguity.To solve this problem

a range ambiguity resolving method for high-resolution and wide-swath (HRWS) imaging with frequency diversity array (FDA) SAR is proposed in this paper.Based on the extra degrees-of-freedom in range domain

FDA is capable of distinguishing the range ambiguous signal in spatial frequency domain.The proposed method first separates the range ambiguous signal in spatial frequency domain

and then performs imaging processing separately on different range ambiguous region to achieve HRWS imaging.Simulation results validate the effectiveness of the proposed method.

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