一站固定式双基FMCW SAR地面振动目标检测与特征提取

梁颖; 张群; 罗迎; 武勇

doi:10.12000/JR15082

一站固定式双基FMCW SAR地面振动目标检测与特征提取

doi: 10.12000/JR15082

1.
(空军工程大学信息与导航学院西安 710077)
2.
(陕西省计量科学研究院西安 710065)

基金项目:

国家自然科学基金(61172169, 61471386)

详细信息

作者简介:
梁颖(1987-),男,河北唐山人,现为空军工程大学信息与导航学院博士研究生。研究方向为雷达成像与信号处理。E-mail:liangying8633@163.com张群(1964-),男,陕西合阳人,现为空军工程大学信息与导航学院教授,博士生导师,IEEESeniorMember,中国电子学会无线电定位技术分会委员。研究方向为雷达成像与目标识别。E-mail:zhangqunnus@gmail.com罗迎(1984-),男,湖南益阳人,现为空军工程大学信息与导航学院讲师,硕士生导师,在《IEEETransactionsonGeoscienceandRemoteSensing》、《IEEETransactionsonAerospaceandElectronicSystems》、《ScienceChinaInformationSciences》、《电子学报》等国内外学术期刊和会议录上发表和录用论文50余篇。主要研究方向为雷达成像与目标识别。E-mail:luoying2002521@163.com

通讯作者:
梁颖liangying8633@163.com

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- 被引次数: 0
出版历程
- 收稿日期: 2015-07-01
- 修回日期: 2015-09-13
- 网络出版日期: 2015-12-28

Vibrating Ground Target Detection and Feature Extraction of One-stationary Bistatic Frequency-modulated Continuous-wave Synthetic Aperture Radar

1.
(School of Information and Navigation, AFEU, Xi'an 710077, China)
2.
(Shaanxi Institute of Metrology, Xi'an 710065, China)

Funds:

The National Natural Science Foundation of China (61172169, 61471386)

摘要

摘要: 地面目标的微小运动是目标本身独有的特性,可用于目标的分类与识别。论文对一站固定式双基FMCWSAR地面振动目标检测与特征提取方法展开研究,采用相位中心偏置天线(DPCA)技术进行杂波抑制,进而检测出地面振动目标。对回波信号分析表明,经DPCA杂波抑制后回波信号中存在一个随慢时间变化的包络项,称为慢时间包络(STE),该项将影响振动目标微多普勒(m-D)时频曲线的能量分布,导致无法获取完整的振动目标m-D时频曲线;进一步地,利用STE项与振动特征之间的关系,可实现振动目标的特征提取。仿真实验验证了理论分析结果及特征提取方法的有效性。
- 一站固定式 /
- 双基FMCW SAR /
- 振动目标 /
- 相位中心偏置天线 /
- 慢时间包络
Abstract: One of the unique characteristics of a ground target is its micro-motion, which can be used for target classification and identification. In this study, methods for vibrating ground target detection and feature extraction of the one-stationary bistatic frequency-modulated continuous-wave Synthetic Aperture Radar (SAR) are studied. The Displaced Phase Center Antenna (DPCA) technique is adopted to suppress the ground clutter, allowing the ground-vibrating targets to be detected. Analysis of the received signal indicates that the DPCA processing results in a slow time-varying envelope, known as the Slow Time Envelope (STE). The STE has a direct effect on the micro-Doppler time-frequency curve, which therefore cannot be obtained unbroken. Furthermore, vibrating features are extracted by utilizing their relationship with the STE term. Finally, some simulations are provided to validate the theoretical derivation and effectiveness of the proposed extraction method.
- One-stationary /
- Bistatic FMCW SAR /
- Vibrating target /
- Displaced Phase Center Antenna (DPCA) /
- Slow time envelope

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参考文献(20)

[1]	Entzminger J N. Joint STARS and GMTI: past, present and future[J]. IEEE Transactions on Aerospace and Electronic Systems, 1999, 35(2): 748-761.
[2]	Chen V C, Li F Y, Ho S S, et al.. Micro-Doppler Effect in Radar: Phenomenon, Model and Simulation Study[J]. IEEE Transactions on Aerospace and Electronic Systems, 2006, 42(1): 2-21.
[3]	Deng B, Wu G Z, Qin Y L, et al.. SAR/MMTI: an extension to conventional SAR/GMTI and a combination of SAR and micromotion techniques[C]. IET RADAR Conference, Guilin, China, 2009: 42-45.
[4]	Deng B, Wang H Q, Li X, et al.. Generalised likelihood ratio test detector for micro-motion targets in SAR raw signals[J]. IET Radar, Sonar and Navigation, 2011, 5(5): 528-535.
[5]	Deng B, Wang H Q, Wu C G, et al.. SAR micromotion target detection based on gapped sine curves[C]. IGARSS Munich, Germen, 2012: 29-32.
[6]	邓彬. 合成孔径雷达微动目标指示(SAR/MMTI)研究[D]. [博士论文], 国防科技大学, 2011.Deng Bin. Study on the Synthetic Aperyure Radar Micro-Motion Target Indication (SAR/MMTI)[D]. [Ph.D. dissertation], School of Electronic Science and Engineering, 2011.
[7]	邓彬, 吴称光, 秦玉亮, 等. 合成孔径雷达微动目标指示(SAR/MMTI)研究进展[J]. 电子学报, 2013, 41(12): 2436-2442.Deng Bin, Wu Cheng-guang, Qin Yu-liang, et al.. Advances in Synthetic Aperture Radar Micro-Motion Target Indication (SAR/MMTI)[J]. Acta Electronica Sinica, 2013, 41(12): 2436-2442.
[8]	Sparr T and Krane B. Micro-Doppler analysis of vibrating targets in SAR[J]. IEE Proceedings-Radar, Sonar and Navigation, 2003, 150(4): 277-283.
[9]	Regg M, Meier E, and Nesch D. Vibration and rotation in millimeter-wave SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2007, 45(2): 293-304.
[10]	Clemente C and Soraghan J J. Vibrating target micro-Doppler signature in bistatic SAR with a fixed receiver[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(8): 3219-3227.
[11]	Zhao G, Zhang C, and Fu Y W, et al.. Micro-Doppler analysis of vibrating target in MIMO SAR[C]. EUSAR Conference, Berlin, Germany, 2014: 624-627.
[12]	张伟, 童创明, 张群, 等. 基于DPCA杂波抑制的地面振动目标微多普勒提取[J]. 系统工程与电子技术, 2011, 33(4): 738-741.Zhang Wei, Tong Chuang-ming, Zhang Qun, et al.. Micro-Doppler extraction of ground vibrating targets based on SAR/DPCA technique[J]. Systems Engineering and Electronics, 2011, 33(4): 738-741.
[13]	Zhang W, Tong C, and Zhang Q, et al.. Extraction of vibrating features with dual-channel fixed-receiver bistatic SAR[J]. IEEE Geoscience and Remote Sensing Letters, 2012, 9(3): 507-511.
[14]	Meta A, Hoogeboom P, and Ligthart L P. Signal processing for FMCW SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2007, 45(11): 3519-3532.
[15]	Liu Y, Deng Y, Wang R, et al.. Efficient and precise frequency-modulated continuous wave synthetic aperture radar raw signal simulation approach for extended scenes[J]. IET Radar, Sonar and Navigation, 2012, 6(9): 858-866.
[16]	Stove A G. Linear FMCW radar techniques[J]. IEE Proceedings F: Radar and Signal Processing, 1992, 139(5): 343-350.
[17]	梁毅, 李燕平, 邢孟道, 等. 一种平行航线双基聚束式FMCW SAR的两步处理方法[J]. 电子学报, 2013, 41(10): 1975-1982.Liang Yi, Li Yan-ping, Xing Meng-dao, et al.. A two-step processing approach for parallel bistatic spotlight FMCW SAR focusing[J]. Acta Electronica Sinica, 2013, 41(10): 1975-1982.
[18]	金日初, 王宇, 邓云凯, 等. 改进的一站固定式双基SAR频域成像方法[J]. 雷达学报, 2014, 3(2): 192-200. doi: 10.3724/SP.J.1300.2014.13115. Jin Ri-chu, Wang Yu, Deng Yun-kai, et al.. A modified frequency domain imaging method for one-stationary bistatic SAR[J]. Journal of Radars, 2014, 3(2): 192-200. doi: 10.3724/SP.J.1300.2014.13115.
[19]	梁毅, 王虹现, 邢孟道, 等. 基于FMCW的大斜视SAR成像研究[J]. 电子与信息学报, 2009, 31(4): 776-780. doi: 10.3724/SP.J.1146.2007.01851.Liang Yi, Wang Hong-xian, Xing Meng-dao, et al.. Imaging study of high squint SAR based on FMCW[J]. Journal of Electronics Information Technology, 2009, 31(4): 776-780. doi: 10.3724/SP.J.1146.2007.01851.
[20]	刘向阳, 廖桂生, 杨志伟, 等. 机载多通道雷达DPCA误差补偿及稳健的杂波抑制[J]. 电子学报, 2009, 37(9): 1982-1988.Liu Xiang-yang, Liao Gui-sheng, Yang Zhi-wei, et al.. DPCA error compensation and robust clutter suppression for multi-channel airborne radar[J]. Acta Electronica Sinica, 2009, 37(9): 1982-1988.