基于级数反演的斜视FMCW SAR成像算法研究

doi:10.3969/j.issn.0372-2112.2013.03.019

电子学报

基于级数反演的斜视FMCW SAR成像算法研究

张双喜¹, 李军², 张磊¹, 邢孟道¹, 保铮¹

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. 北京无线电测量研究所, 北京 100854

收稿日期:2011-11-25 修回日期:2012-11-12 出版日期:2013-03-25
- 作者简介:
- 张双喜 男,1984年出生于福建东山.2004年就读于西安电子科技大学,2008年获学士学位,现为西安电子科技大学雷达信号处理国家重点实验室在读博士研究生,主要从事SAR、高分辨宽测绘SAR成像及其干扰抑制的研究. E-mail:shuangxizhang1984@163.com; 李军 男,1982年出生于湖北宜都市.2002年就读于西安电子科技大学电子工程学院,2006年获学士学位,2011年获西安电子科技大学博士学位,现为北京无线电测量研究所工程师,主要研究方向:雷达成像. E-mail:lijun@mail.xidian.edu.cn
- 基金资助:
- 国家自然科学基金优秀青年基金 (No.61222108)

Frequency Modulated Continuous Wave Squint Synthetic Aperture Radar Imaging Algorithm Based on Series Reversion

ZHANG Shuang-xi¹, LI Jun², ZHANG Lei¹, XING Meng-dao¹, BAO Zheng¹

1. National Laboratory of Radar Signal Processing, Xidian University, Xi'an, Shaanxi 710071, China;
2. The Measurement of Wireless Institute in Beijing, Beijing 100854, China

Received:2011-11-25 Revised:2012-11-12 Online:2013-03-25 Published:2013-03-25
- Supported by:
- National Natural Science Foundation of China for Excellent Youth Schoolars (No.61222108)

摘要/Abstract

摘要： 在斜视调频连续波(FMCW)合成孔径雷达(SAR)成像中,斜距的三次项不仅会对相位产生影响,同时对包络也会有影响.如果不进行有效校正,将会影响到SAR图像的聚焦效果.针对这个问题,本文利用级数反演的方法推导出斜距展开到三次项时回波信号的距离多普勒频谱表达式,并在距离多普勒域上对三次项进行包络和相位滤波处理.此外,考虑到时域走动校正带来方位空变性问题,本文利用方位非线性变标算法(NCS)解决其沿方位空变性问题并给出结合运动补偿的实测数据处理的算法流程图.最后通过对多个点目标的场景进行仿真实验以及实测数据处理来验证本文成像算法的可行性和有效性.

关键词: 合成孔径雷达, 调频连续波, 解线性调频, 非线性变标, 级数反演

Abstract: In the frequency modulated continuous wave(FMCW)squint synthetic aperture radar(SAR)imaging,not only the phases but also the envelopes of the echoes will be affected by the third term in range.If it isn’t well-corrected,the performance of focusing for the SAR image will be deteriorated.Thus,the echo expression in the range-Doppler domain is presented by the series Reversion algorithm when the range expression comes to the third item.After that,a correction is implemented in the range-Doppler domain.In addition,considering the azimuth-variance in phase brought by the linear rang migration correction in azimuth time domain,the non-linear chirp scaling algorithm is utilized to solve the azimuth-variance problem.And a flowchart of the proposed FMCW imaging algorithm with motion compensation for processing the real measured data is given in this paper.Finally,the simulated experiment with multiple point targets scenario and the imaging result of real measured data are utilized to validate the feasibility and effectiveness of the proposed imaging algorithm.

Key words: synthetic aperture radar(SAR), frequency modulated continuous wave(FMCW), dechirp, non-linear chirp scaling(NCS), series Reversion

中图分类号:

TN958

张双喜, 李军, 张磊, 等. 基于级数反演的斜视FMCW SAR成像算法研究[J]. 电子学报, DOI: 10.3969/j.issn.0372-2112.2013.03.019.

ZHANG Shuang-xi, LI Jun, ZHANG Lei, et al. Frequency Modulated Continuous Wave Squint Synthetic Aperture Radar Imaging Algorithm Based on Series Reversion[J]. Acta Electronica Sinica, DOI: 10.3969/j.issn.0372-2112.2013.03.019.

参考文献

[1] 梁毅,郭亮,邢孟道,保铮.一种斜视FMCW SAR的等效正侧视处理方法[J].电子学报,2009,37(6):1159-1164.
Liang Yi,Guo Liang,Xing Mengdao,Bao Zheng.An equivalent side-looking method for squint FMCW SAR[J].Acta Electronica Sinica,2009,37(6):1159-1164.(in Chinese)
[2] 刘安娜,陈力,赵斐,匡纲要.基于DPCA-FrFT的三通道SAR-GMTI方法[J].电子学报,2011,39(9):2091-2097.
Liu Anna,Chen Li,Zhao Fei,Kuang Gangyao.Study on DPCA-FrFT based multi-channel SAR-GMTI[J].Acta Electronica Sinica,2011,39(9):2091-2097.(in Chinese)
[3] 俞根苗,尚勇,邓海涛,等.弹载侧视合成孔径雷达信号分析及成像研究[J].电子学报,2005,33(5):778-782.
Yu genmiao,Shang Yong,Deng Haitao,et al.Signal analysis and imaging processing of missile-borne side-looking SAR[J].Acta Electronica Sinica,2005,33(5):778-782.(in Chinese)
[4] 杨明磊,陈伯孝,等.多载频FMCW在MIMO雷达中的应用研究[J].电子学报,2008,36(12):2351-2356.
Yang Minglei,Chen Baixiao,et al.Study on application of multiple carrier frequency FMCW in MIMO radar[J].Acta Electronica Sinica,2008,36(12):2351-2356.(in Chinese)
[5] Yue Liu,Yunkai Deng,Robert Wang.Focus squint FMCW SAR data using inverse chirp-Z transform based on an analytical point target reference spectrum[J].IEEE Geoscience and Remote Sensing Letters,2012,9(5):866-870.
[6] Angel Ribalta.Time-domain reconstruction algorithms for FMCW-SAR[J].IEEE Geoscience and Remote Sensing Letters,2011,8(3):396-400.
[7] Jiang Z H,Huangfu K,Wan J W.A chirp transform algorithm for processing squint mode FMCW SAR data[J].IEEE Geoscience and Remote Sensing Letters,2007,4(3):377-381.
[8] Jiang Z H,Cheng Z,Wan J W,Huangfu K.Improved nonlinear frequency scaling algorithm for squint FMCW SAR[J].Electronics Letter,2007,18(43):996-998.
[9] R Wang,O Loffeld,H Nies,S Knedlik,M Hagelen,H Essen.Focus FMCW SAR data using the wave number domain algorithm[J].IEEE Transactions on Geoscience and Remote Sensing,2010,48(4):2109-2118.
[10] A Meta,P Hoogeboom.Signal processing algorithms for FMCW moving target indicator synthetic aperture radar[A].Proceedings of IGARSS’05[C].Seoul,Kotea,2005.316-319.
[11] 保铮,邢孟道,王彤.雷达成像技术[M].北京:电子工业出版社,2004.
[12] 黄源宝,保铮.大斜视SAR成像的一种新的二维可分离处理方法[J].电子与信息学报,2005,27(1):1-5.
Huang Yuanbao,Bao Zheng.A new two-dimension-separated approach to high squint SAR processing[J].Journal of Electronics & Information Technology,2005,27(1):1-5.(in Chinese)
[LL][13] 李悦丽,梁甸农,黎向阳.一种改进方位向非线性CS大斜视角SAR成像算法[J].国防科技大学学报,2008,30(5):62-67.
Li Yueli,Liang Diannong,Li Xiangyang.A refined azimuth nonlinear chirp scaling algorithm for high squint SAR imaging[J].Journal of National University Defense Technology,2008,30(5):62-67.(in Chinese)
[14] 王亮,练有品,等.大斜视与大波束角SAR成像比较[J].电子学报,2006,34(9):1672-1676.
Wang Liang,Lian Youpin,et al.Comparison of large-squint and large-beamwidth SAR imaging[J].Acta Electronica Sinica,2006,34(9):1672-1676.(in Chinese)
[15] Evan C Zaugg,David G Long.Theory and application of motion compensation for LFM-CW SAR[J].IEEE Transaction on Geoscience and Remote Sensing,2009,46(10):2990-2998.
[16] W G Carrara,R S Goodman,R M Majewski.Spotlight Synthetic Aperture Radar:Signal Processing Algorithms[M].Boston,MA:Artech House,1995.245-254.
[17] Mengdao Xing,Xiuwei Jiang,Renbiao Wu.Motion compensation for UAV SAR based on raw radar data[J].IEEE Transactions on Geoscience and Remote Sensing,2009,47(8):2870-2883.
[18] Glanfranco Fornaro,Giorgio Franceschettl,Stefano perna.Motion compensation errors:Effects on the accuracy of airborne SAR images[J].IEEE Transactions on Aerospace and Electronic Systems,2005,41(4):1338-1352.

基于级数反演的斜视FMCW SAR成像算法研究

Frequency Modulated Continuous Wave Squint Synthetic Aperture Radar Imaging Algorithm Based on Series Reversion

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

[1]	王俊杰, 冯德军, 隋冉, 邢世其, 肖顺平. 基于非周期PSS的SAR目标特征操控方法研究[J]. 电子学报, 2023, 51(3): 564-572.
[2]	张继龙, 李业振, 刘勇, 王栋. 基于透镜成像原理的微波阵列快速成像技术[J]. 电子学报, 2022, 50(5): 1107-1116.
[3]	张云, 化青龙, 姜义成, 徐丹. 基于混合型复数域卷积神经网络的三维转动舰船目标识别[J]. 电子学报, 2022, 50(5): 1042-1049.
[4]	李玉, 王姝运, 赵泉华. 基于斑点统计特性保持的SAR影像迭代滤波[J]. 电子学报, 2021, 49(9): 1809-1817.
[5]	王明春, 张嘉峰, 杨子渊, 刘涛. Beta分布下基于白化滤波的极化SAR图像海面舰船目标CFAR检测方法[J]. 电子学报, 2019, 47(9): 1883-1890.
[6]	张嘉峰, 杨子渊, 张鹏, 刘涛. Fisher纹理分布下基于匹配滤波的极化SAR图像CFAR检测方法[J]. 电子学报, 2019, 47(12): 2533-2543.
[7]	李亮, 洪峻, 陈琦, 王爱春, 王宇, 明峰, 朱勇涛. 基于极化有源定标器的高分三号SAR在轨测试分析[J]. 电子学报, 2018, 46(9): 2157-2164.
[8]	李东, 赵婷, 宋伟, 刘庆华, 曾浩, 张成祥. 一种低信噪比下稳健的ISAR平动补偿方法[J]. 电子学报, 2018, 46(9): 2049-2056.
[9]	王彬, 王国宇. 基于广义Gamma分布的高分辨率SAR图像海岸线检测[J]. 电子学报, 2018, 46(4): 827-833.
[10]	陈文峰, 李少东, 杨军, 马晓岩. 低信噪比下二维联合快速超分辨B-ISAR成像方法[J]. 电子学报, 2018, 46(4): 840-848.
[11]	张嘉峰, 朱博, 张鹏, 王明春, 刘涛. Wishart分布情形下极化SAR图像目标CFAR检测解析方法[J]. 电子学报, 2018, 46(2): 433-439.
[12]	张嘉峰, 张鹏, 王明春, 刘涛. Fisher分布下基于白化滤波的极化SAR图像CFAR检测方法[J]. 电子学报, 2018, 46(12): 2854-2861.
[13]	张云鹏, 毕大平, 房明星, 沈爱国. 对SAR双通道对消的方位向间歇采样散射波干扰[J]. 电子学报, 2018, 46(12): 2832-2839.
[14]	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.
[15]	李东, 占木杨, 粟嘉, 方志平, 曹海林. 一种基于相干积累CPF和NUFFT的机动目标ISAR成像新方法[J]. 电子学报, 2017, 45(9): 2225-2232.