双通道两视干涉相位差解径向速度模糊方法

doi:10.3969/j.issn.1001-2400.2014.03.003

J4 ›› 2014, Vol. 41 ›› Issue (3): 14-19+87.doi: 10.3969/j.issn.1001-2400.2014.03.003

双通道两视干涉相位差解径向速度模糊方法

张学攀;廖桂生;朱圣棋;杨东;高永婵

(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)

收稿日期:2013-01-17 出版日期:2014-06-20 发布日期:2014-07-10
通讯作者: 张学攀
作者简介:张学攀(1986-)，男，西安电子科技大学博士研究生，E-mail：xpzhang7@163.com．
基金资助:
国家973计划资助项目(2010CB731903)；国家自然科学基金资助项目(61101249)；长江学者和创新团队发展计划资助项目(IRT0954)

Solution to radial velocity ambiguity by dual-channel two-look interferometric phase difference

ZHANG Xuepan;LIAO Guisheng;ZHU Shengqi;YANG Dong;GAO Yongchan

(National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071， China)

Received:2013-01-17 Online:2014-06-20 Published:2014-07-10
Contact: ZHANG Xuepan

摘要/Abstract

摘要：

针对合成孔径雷达地面动目标显示(SAR-GMTI)系统中动目标径向速度估计存在模糊的问题，提出了基于双通道两视干涉相位差实现无模糊估计径向速度的方法．该方法在距离频率域构造两视数据，将不同通道数据做干涉处理以得到两视数据的干涉相位．两视数据的干涉相位差不存在缠绕问题，可以用来无模糊地估计径向速度．理论推导证明，所提方法有效提高了最大不模糊速度．文中着重分析了两视数据距离频率间隔对径向速度估计性能的影响．通过仿真和实测数据处理验证了所提方法．

关键词: 地面动目标指示, 合成孔径雷达, 径向速度无模糊估计, 双通道两视干涉相位差

Abstract:

Based on dual-channel two-look interferometric phase difference, a new method is proposed to estimate the radial velocity of a moving target unambiguously in the synthetic aperture radar/ground moving target indication (SAR/GMTI) system. The two-look data is constructed in the range frequency domain, and interferometric phases of two-look are obtained by interferometry between the data of different channels. Since the interferometric phase difference of the two-look is not wrapped, the proposed method can be used to estimate the radial velocity of a moving target unambiguously. And the maximum unambiguous radial velocity is effectively improved by the proposed method. The effect on radial velocity estimation by the interval of the two-look data in range frequency is focused. Numerical and real data are processed to demonstrate the effectiveness of the proposed method.

Key words: ground moving targets indication, synthetic aperture radar, unambiguous radial velocity estimation, dual-channel two-look interferometric phase difference

张学攀;廖桂生;朱圣棋;杨东;高永婵. 双通道两视干涉相位差解径向速度模糊方法[J]. J4, 2014, 41(3): 14-19+87.

ZHANG Xuepan;LIAO Guisheng;ZHU Shengqi;YANG Dong;GAO Yongchan. Solution to radial velocity ambiguity by dual-channel two-look interferometric phase difference[J]. J4, 2014, 41(3): 14-19+87.

参考文献

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双通道两视干涉相位差解径向速度模糊方法

Solution to radial velocity ambiguity by dual-channel two-look interferometric phase difference

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