FDA-SAR高分辨宽测绘带成像距离解模糊方法

doi:10.3969/j.issn.0372-2112.2017.09.005

电子学报 ›› 2017, Vol. 45 ›› Issue (9): 2085-2091.DOI: 10.3969/j.issn.0372-2112.2017.09.005

FDA-SAR高分辨宽测绘带成像距离解模糊方法

王成浩^1,2, 廖桂生^1,2, 许京伟^1,2

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

收稿日期:2016-01-27 修回日期:2016-03-31 出版日期:2017-09-25
- 作者简介:
- 王成浩,男,1991年生于河南灵宝.西安电子科技大学雷达信号处理国家重点实验室博士生.研究方向为MIMO雷达.E-mail:wangchenghao1991@126.com;廖桂生,男,1963年生于广西桂林.西安电子科技大学雷达信号处理国家重点实验室教授.研究方向为雷达探测系统空时自适应处理、天基预警和阵列信号处理等.
- 基金资助:
- 国家自然科学基金 (No.61231017）; 中国博士后科学基金 (No.2016M590925）; 中央高校基本科研业务费 (No.XJS16009，No.JB160228）

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

WANG Cheng-hao^1,2, LIAO Gui-sheng^1,2, XU Jing-wei^1,2

1. National Lab of Radar Signal Processing, Xidian Univ, Xi'an, Shaanxi 710071, China;
2. Collaborative Innovation Center of Information Sensing and Understanding, Xi'an, Shaanxi 710071, China

Received:2016-01-27 Revised:2016-03-31 Online:2017-09-25 Published:2017-09-25
- Supported by:
- 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)

摘要/Abstract

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.

关键词: 频率分集阵列, 距离模糊, 合成孔径雷达, 高分辨宽测绘带

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.

Key words: frequency diversity array (FDA), range ambiguity, synthetic aperture radar (SAR), high-resolution and wide-swath (HRWS)

中图分类号:

TN957.51

王成浩, 廖桂生, 许京伟. FDA-SAR高分辨宽测绘带成像距离解模糊方法[J]. 电子学报, 2017, 45(9): 2085-2091.

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.

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FDA-SAR高分辨宽测绘带成像距离解模糊方法

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

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