基于双频联合处理的太赫兹InISAR成像方法
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摘要
为提高太赫兹InISAR成像精度,该文提出了一种基于双频联合处理的成像方法。将雷达回波信号在快时间域分为两部分,分别按传统InISAR方法进行成像,再对两部分的成像结果进行比较分析,去除冗余点和坏点,得到最终的InISAR成像结果。针对飞机的散射点模型,给出了双频联合处理方法的InISAR成像结果,并仿真分析成像结果的均方根误差,结果表明,相比于传统InISAR成像方法,基于双频联合处理的InISAR成像方法在不同信噪比条件下均能有效提升成像精度。
To improve the imaging accuracy of Interferometry Inverse Synthetic Aperture Radar(In ISAR), in this paper, we propose a novel method based on the joint processing of dual-frequency data. First, we divide the radar echo into two parts in the fast-time domain, then we apply the conventional In ISAR method to each dataset.By comparing and analyzing the imaging results of the two parts, we can identify and remove redundant and bad pixels. Using the proposed joint processing method, we obtained the In ISAR imaging results of a scatter model of an airplane and calculated the Root Mean Square Error(RMSE). The simulation results show that the proposed method can effectively improve imaging accuracy with different Signal-to-Noise Ratio(SNR).
To improve the imaging accuracy of Interferometry Inverse Synthetic Aperture Radar(In ISAR), in this paper, we propose a novel method based on the joint processing of dual-frequency data. First, we divide the radar echo into two parts in the fast-time domain, then we apply the conventional In ISAR method to each dataset.By comparing and analyzing the imaging results of the two parts, we can identify and remove redundant and bad pixels. Using the proposed joint processing method, we obtained the In ISAR imaging results of a scatter model of an airplane and calculated the Root Mean Square Error(RMSE). The simulation results show that the proposed method can effectively improve imaging accuracy with different Signal-to-Noise Ratio(SNR).
引文
[1]保铮,邢孟道,王彤.雷达成像技术[M].北京:电子工业出版社,2005.Bao Zheng,Xing Meng-dao,and Wang Tong.Technology of Radar Imaging[M].Beijing:Publishing House of Electronics Industry,2005.
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[3]毕严先,魏少明,王俊,等.基于最小二乘估计的In ISAR空间目标三维成像方法[J].电子与信息学报,2016,38(5):1079-1084.DOI:10.11999/JEIT151000.Bi Yan-xian,Wei Shao-ming,Wang Jun,et al..Interferometric ISAR imaging for 3-D geometry of uniformly rotating targets based on least squares estimation method[J].Journal of Electronics&Information Technology,2016,38(5):1079-1084.DOI:10.11999/JEIT151000.
[4]Wu W Z,Hu P H,Xu S Y,et al..Image registration for In ISAR based on joint translational motion compensation[J].IET Radar,Sonar&Navigation,2017,11(10):1597-1603.
[5]Ma M,Li D J,Du J B,et al..Signal processing of In ISAR with Long orthogonal baselines for air target threedimensional localization[C].Proceedings of EUSAR 2016:11 th European Conference on Synthetic Aperture Radar,Hamburg,Germany,2016:1-4.
[6]牧凯军,张振伟,张存林.太赫兹科学与技术[J].中国电子科学研究院学报,2009,4(3):221-230,237.Mu Kai-jun,Zhang Zhen-wei,and Zhang Cun-lin.Terahertz science and technology[J].Journal of China Academy of Electronics and Information Technology,2009,4(3):221-230,237.
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[9]Deng Bin,Chen Shuo,Luo Chneg-gao,et al..Review of terahertz coded-aperture imaging[J].Journal of Infrared and Millimeter Waves,2017,36(3):302-310.
[10]Jiang Y W,Deng B,Wang H Q,et al..An effective nonlinear phase compensation method for FMCW terahertz radar[J].IEEE Photonics Technology Letters,2016,28(15):1684-1687.DOI:10.1109/LPT.2016.2558462.
[11]Li D J,Ma M,Du J B,et al..Moving target imaging detection for millimeter-wave In ISAR[C].Proceedings of EUSAR 2016:11th European Conference on Synthetic Aperture Radar,Hamburg,Germany,2016:286-289.
[12]刘承兰,高勋章,黎湘.干涉式逆合成孔径雷达成像技术综述[J].信号处理,2011,27(5):737-748.Liu Cheng-lan,Gao Xun-zhang,and Li Xiang.Review of interferometric ISAR imaging[J].Signal Processing,2011,27(5):737-748.
[13]Zhang Q and Yeo T S.Three-dimensional SAR imaging of a ground moving target using the In ISAR technique[J].IEEETransactions on Geoscience and Remote Sensing,2004,42(9):1818-1828.DOI:10.1109/TGRS.2004.831863.
[14]Wang Y and Li X L.Three-dimensional interferometric ISAR imaging for the ship target under the Bi-static configuration[J].IEEE Journal of Selected Topics in AppliedEarth Observations and Remote Sensing,2016,9(4):1505-1520.DOI:10.1109/JSTARS.2015.2513774.
[15]马萌,李道京,李烈辰,等.正交长基线毫米波In ISAR运动目标三维成像[J].红外与毫米波学报,2016,35(4):488-495.DOI:10.11972/j.issn.1001-9014.2016.04.018.Ma Meng,Li Dao-jing,Li Lie-chen,et al..3-D imaging for moving targets based on millimeter-wave In ISAR with long orthogonal baselines[J].Journal of Infrared and Millimeter Waves,2016,35(4):488-495.DOI:10.11972/j.issn.1001-9014.2016.04.018.
[16]Xu G,Xing M D,Xia X G,et al..3D geometry and motion estimations of maneuvering targets for interferometric ISARwith sparse aperture[J].IEEE Transactions on Image Processing,2016,25(5):2005-2020.DOI:10.1109/TIP.2016.2535362.
[17]刘承兰,高勋章,贺峰,等.一种基于相位校正的In ISAR图像配准新方法[J].国防科技大学学报,2011,33(5):116-122.Liu Cheng-lan,Gao Xun-zhang,He Feng,et al..A novel method for image registration in In ISAR imaging based on phase correction[J].Journal of National University of Defense Technology,2011,33(5):116-122.
[18]张冬晨.In ISAR三维成像的关键技术研究[D].[博士论文],中国科学技术大学,2009.Zhang Dong-chen.Research on the key techniques of interferometric inverse synthetic aperture radar imaging[D].[Ph.D.dissertation],University of Science and Technology of China,2009.
[19]刘承兰.干涉逆合成孔径雷达(In ISAR)三维成像技术研究[D].[博士论文],国防科学技术大学,2012.Liu Cheng-lan.Research on interferometric inverse synthetic aperture radar three-dimensional imaging[D].[Ph.D.dissertation],National University of Defense Technology,2012.
[20]Richards M A.邢孟道,王彤,李真芳,等译.雷达信号处理基础[M].北京:电子工业出版社,2010.Richards M A.Xing Meng-dao,Wang Tong,Li Zhen-fang,et al Translation.Fundamentals of Radar Signal Processing[M].Beijing:Publishing House of Electronics Industry,2010.
[2]Zhang X P,Liao G S,Zhu S Q,et al..An unambiguous radial velocity estimation method based on interferometric phase in range frequency domain[C].Proceedings of the14th International Radar Symposium(IRS),Dresden,Germany,2013,1:543-548.
[3]毕严先,魏少明,王俊,等.基于最小二乘估计的In ISAR空间目标三维成像方法[J].电子与信息学报,2016,38(5):1079-1084.DOI:10.11999/JEIT151000.Bi Yan-xian,Wei Shao-ming,Wang Jun,et al..Interferometric ISAR imaging for 3-D geometry of uniformly rotating targets based on least squares estimation method[J].Journal of Electronics&Information Technology,2016,38(5):1079-1084.DOI:10.11999/JEIT151000.
[4]Wu W Z,Hu P H,Xu S Y,et al..Image registration for In ISAR based on joint translational motion compensation[J].IET Radar,Sonar&Navigation,2017,11(10):1597-1603.
[5]Ma M,Li D J,Du J B,et al..Signal processing of In ISAR with Long orthogonal baselines for air target threedimensional localization[C].Proceedings of EUSAR 2016:11 th European Conference on Synthetic Aperture Radar,Hamburg,Germany,2016:1-4.
[6]牧凯军,张振伟,张存林.太赫兹科学与技术[J].中国电子科学研究院学报,2009,4(3):221-230,237.Mu Kai-jun,Zhang Zhen-wei,and Zhang Cun-lin.Terahertz science and technology[J].Journal of China Academy of Electronics and Information Technology,2009,4(3):221-230,237.
[7]Siegel P H.Terahertz technology[J].IEEE Transactions on Microwave Theory and Techniques,2002,50(3):910-928.DOI:10.1109/22.989974.
[8]Siegel P H.THz for space:The golden age[C].Proceedings of IEEE MTT-S International Microwave Symposium Digest(MTT),Anaheim,CA,USA,2010:816-819.
[9]Deng Bin,Chen Shuo,Luo Chneg-gao,et al..Review of terahertz coded-aperture imaging[J].Journal of Infrared and Millimeter Waves,2017,36(3):302-310.
[10]Jiang Y W,Deng B,Wang H Q,et al..An effective nonlinear phase compensation method for FMCW terahertz radar[J].IEEE Photonics Technology Letters,2016,28(15):1684-1687.DOI:10.1109/LPT.2016.2558462.
[11]Li D J,Ma M,Du J B,et al..Moving target imaging detection for millimeter-wave In ISAR[C].Proceedings of EUSAR 2016:11th European Conference on Synthetic Aperture Radar,Hamburg,Germany,2016:286-289.
[12]刘承兰,高勋章,黎湘.干涉式逆合成孔径雷达成像技术综述[J].信号处理,2011,27(5):737-748.Liu Cheng-lan,Gao Xun-zhang,and Li Xiang.Review of interferometric ISAR imaging[J].Signal Processing,2011,27(5):737-748.
[13]Zhang Q and Yeo T S.Three-dimensional SAR imaging of a ground moving target using the In ISAR technique[J].IEEETransactions on Geoscience and Remote Sensing,2004,42(9):1818-1828.DOI:10.1109/TGRS.2004.831863.
[14]Wang Y and Li X L.Three-dimensional interferometric ISAR imaging for the ship target under the Bi-static configuration[J].IEEE Journal of Selected Topics in AppliedEarth Observations and Remote Sensing,2016,9(4):1505-1520.DOI:10.1109/JSTARS.2015.2513774.
[15]马萌,李道京,李烈辰,等.正交长基线毫米波In ISAR运动目标三维成像[J].红外与毫米波学报,2016,35(4):488-495.DOI:10.11972/j.issn.1001-9014.2016.04.018.Ma Meng,Li Dao-jing,Li Lie-chen,et al..3-D imaging for moving targets based on millimeter-wave In ISAR with long orthogonal baselines[J].Journal of Infrared and Millimeter Waves,2016,35(4):488-495.DOI:10.11972/j.issn.1001-9014.2016.04.018.
[16]Xu G,Xing M D,Xia X G,et al..3D geometry and motion estimations of maneuvering targets for interferometric ISARwith sparse aperture[J].IEEE Transactions on Image Processing,2016,25(5):2005-2020.DOI:10.1109/TIP.2016.2535362.
[17]刘承兰,高勋章,贺峰,等.一种基于相位校正的In ISAR图像配准新方法[J].国防科技大学学报,2011,33(5):116-122.Liu Cheng-lan,Gao Xun-zhang,He Feng,et al..A novel method for image registration in In ISAR imaging based on phase correction[J].Journal of National University of Defense Technology,2011,33(5):116-122.
[18]张冬晨.In ISAR三维成像的关键技术研究[D].[博士论文],中国科学技术大学,2009.Zhang Dong-chen.Research on the key techniques of interferometric inverse synthetic aperture radar imaging[D].[Ph.D.dissertation],University of Science and Technology of China,2009.
[19]刘承兰.干涉逆合成孔径雷达(In ISAR)三维成像技术研究[D].[博士论文],国防科学技术大学,2012.Liu Cheng-lan.Research on interferometric inverse synthetic aperture radar three-dimensional imaging[D].[Ph.D.dissertation],National University of Defense Technology,2012.
[20]Richards M A.邢孟道,王彤,李真芳,等译.雷达信号处理基础[M].北京:电子工业出版社,2010.Richards M A.Xing Meng-dao,Wang Tong,Li Zhen-fang,et al Translation.Fundamentals of Radar Signal Processing[M].Beijing:Publishing House of Electronics Industry,2010.