An approach for refocusing of ground fast-moving target and high-order motion parameter estimation using Radon-high-order time-chirp rate transform

Long synthetic aperture time can improve the imaging quality of a ground moving target, whereas a moving target may be severely smeared in the cross-range image due to the range migration and the Doppler frequency migration. In this paper, the effects of the third-order Doppler broadening and Doppler ambiguity of a fast-moving target are considered. To address these issues, a novel motion parameter estimation method named high-order time-chirp rate transform (HTRT) is proposed, and then a new synthetic aperture radar (SAR) imaging method based on Radon-HTRT (RHTRT) for a ground moving target is developed. The major contributions are as follows: 1) The proposed SAR imaging method can eliminate the Doppler ambiguity effect. 2) The proposed method can realize longer time coherent integration than Radon-Fourier transform (RFT) and Radon-fractional Fourier transform (RFRFT) methods. 3) The proposed method is computationally efficient since HTRT can obtain the motion parameters of a moving target via performing the 2-dimensional (2-D) fast Fourier transform (FFT). Both the simulated and real data processing results show that the proposed method can finely image a ground moving target in a high signal-to-clutter and noise ratio (SCNR) environment.

[1]  Anna Scaglione,et al.  Product high-order ambiguity function for multicomponent polynomial-phase signal modeling , 1998, IEEE Trans. Signal Process..

[2]  Xiang-Gen Xia,et al.  On bandlimited signals with fractional Fourier transform , 1996, IEEE Signal Processing Letters.

[3]  Sergio Barbarossa,et al.  Detection and imaging of moving objects with synthetic aperture radar. Part 2: Joint time-frequency analysis by Wigner-Ville distribution , 1992 .

[4]  Ian G. Cumming,et al.  Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation , 2005 .

[5]  J. Fienup.  Detecting moving targets in SAR imagery by focusing , 2001 .

[6]  Yunhua Zhang,et al.  An Airborne SAR Moving Target Imaging and Motion Parameters Estimation Algorithm With Azimuth-Dechirping and the Second-Order Keystone Transform Applied , 2015, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[7]  Wei Yi,et al.  A Fast Maneuvering Target Motion Parameters Estimation Algorithm Based on ACCF , 2015, IEEE Signal Processing Letters.

[8]  Xiang-Gen Xia,et al.  A quantitative SNR analysis for the pseudo Wigner-Ville distribution , 1999, IEEE Trans. Signal Process..

[9]  Guisheng Liao,et al.  Ground Moving Target Detection and Velocity Estimation Based on Spatial Multilook Processing for Multichannel Airborne SAR , 2013, IEEE Transactions on Aerospace and Electronic Systems.

[10]  Guisheng Liao,et al.  Ground Moving Targets Imaging Algorithm for Synthetic Aperture Radar , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[11]  Jian Yang,et al.  Detection and Imaging of Ground Moving Targets With Real SAR Data , 2015, IEEE Transactions on Geoscience and Remote Sensing.

[12]  Tong Wang,et al.  High-Resolution SAR Imaging of Ground Moving Targets Based on the Equivalent Range Equation , 2015, IEEE Geoscience and Remote Sensing Letters.

[13]  Jian Yang,et al.  Imaging and Parameter Estimation of Fast-Moving Targets With Single-Antenna SAR , 2014, IEEE Geoscience and Remote Sensing Letters.

[14]  C. Moo,et al.  Truncation effects of FFT on estimation of dynamic harmonics in power system , 2000, PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409).

[15]  R. P. Perry,et al.  SAR imaging of moving targets , 1999 .

[16]  Ishuwa C. Sikaneta,et al.  Radarsat-2 Moving Object Detection Experiment (MODEX) , 2008, IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium.

[17]  Xiaolong Chen,et al.  A fast FRFT based detection algorithm of multiple moving targets in sea clutter , 2010, 2010 IEEE Radar Conference.

[18]  Benjamin Friedlander,et al.  Asymptotic statistical analysis of the high-order ambiguity function for parameter estimation of polynomial-phase signals , 1996, IEEE Trans. Inf. Theory.

[19]  Boualem Boashash,et al.  Comments on "The Cramer-Rao lower bounds for signals with constant amplitude and polynomial phase" , 1998, IEEE Trans. Signal Process..

[20]  Chaoyu Yang,et al.  An Improved Empirical Model for Retrieving Bottom Reflectance in Optically Shallow Water , 2015, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[21]  Dong Yang,et al.  A New Method for Radar High-Speed Maneuvering Weak Target Detection and Imaging , 2014, IEEE Geoscience and Remote Sensing Letters.

[22]  Mengdao Xing,et al.  Robust Ground Moving-Target Imaging Using Deramp–Keystone Processing , 2013, IEEE Transactions on Geoscience and Remote Sensing.

[23]  Renbiao Wu,et al.  Approach for single channel SAR ground moving target imaging and motion parameter estimation , 2007 .

[24]  Hong Gu,et al.  Application of the fractional Fourier transform to moving target detection in airborne SAR , 2002 .

[25]  Mats I. Pettersson,et al.  An evaluation on moving target parameter estimation using Synthetic Aperture Radar systems , 2013, Conference Proceedings of 2013 Asia-Pacific Conference on Synthetic Aperture Radar (APSAR).

[26]  Yingning Peng,et al.  Radon-Fourier Transform for Radar Target Detection (III): Optimality and Fast Implementations , 2012, IEEE Transactions on Aerospace and Electronic Systems.

[27]  James R. Fienup,et al.  Phase Error Correction by Shear Averaging , 1989, Signal Recovery and Synthesis III.

[28]  Motofumi Arii,et al.  Efficient Motion Compensation of a Moving Object on SAR Imagery Based on Velocity Correlation Function , 2014, IEEE Transactions on Geoscience and Remote Sensing.

[29]  John C. Curlander,et al.  Synthetic Aperture Radar: Systems and Signal Processing , 1991 .

[30]  Yingning Peng,et al.  Radon-Fourier Transform for Radar Target Detection, I: Generalized Doppler Filter Bank , 2011, IEEE Transactions on Aerospace and Electronic Systems.

[31]  Gang Li,et al.  A Velocity Estimation Algorithm of Moving Targets using Single Antenna SAR , 2009, IEEE Transactions on Aerospace and Electronic Systems.

[32]  C. Gierull,et al.  Compensating the effects of target acceleration in dual-channel SAR-GMTI , 2006 .

[33]  E. D. Evans,et al.  Search Radar Detection and Track with the Hough Transform , 1994 .

[34]  Shen Chiu,et al.  A comparison of displaced phase centre antenna and along-track interferometry techniques for RADARSAT-2 ground moving target indication , 2005 .

[35]  R.C. DiPietro,et al.  Extended factored space-time processing for airborne radar systems , 1992, [1992] Conference Record of the Twenty-Sixth Asilomar Conference on Signals, Systems & Computers.

[36]  Shen Chiu,et al.  Application of Fractional Fourier Transform to Moving Target Indication via Along-Track Interferometry , 2005, EURASIP J. Adv. Signal Process..

[37]  Gilda Schirinzi,et al.  GLRT Detection of Moving Targets via Multibaseline Along-Track Interferometric SAR Systems , 2012, IEEE Geoscience and Remote Sensing Letters.

[38]  You He,et al.  Detection of a Low Observable Sea-Surface Target With Micromotion via the Radon-Linear Canonical Transform , 2014, IEEE Geoscience and Remote Sensing Letters.

[39]  Ning Xue,et al.  An analysis of time-frequency methods in SAR imaging of moving targets , 2000, Proceedings of the 2000 IEEE Sensor Array and Multichannel Signal Processing Workshop. SAM 2000 (Cat. No.00EX410).

[40]  Boaz Porat,et al.  Estimation and classification of polynomial-phase signals , 1991, IEEE Trans. Inf. Theory.

[41]  Yingning Peng,et al.  Radon-Fourier Transform for Radar Target Detection (II): Blind Speed Sidelobe Suppression , 2011, IEEE Transactions on Aerospace and Electronic Systems.

[42]  Guisheng Liao,et al.  Geometry-Information-Aided Efficient Motion Parameter Estimation for Moving-Target Imaging and Location , 2015, IEEE Geoscience and Remote Sensing Letters.

[43]  Xiaotao Huang,et al.  New Approach for SAR Imaging of Ground Moving Targets Based on a Keystone Transform , 2011, IEEE Geoscience and Remote Sensing Letters.

[44]  You He,et al.  Maneuvering Target Detection via Radon-Fractional Fourier Transform-Based Long-Time Coherent Integration , 2014, IEEE Transactions on Signal Processing.

[45]  Ishuwa C. Sikaneta,et al.  Two-Step Detector for RADARSAT-2's Experimental GMTI Mode , 2013, IEEE Transactions on Geoscience and Remote Sensing.

[46]  Krzysztof S. Kulpa,et al.  Radar Detection of Helicopters with Application of CLEAN Method , 2012, IEEE Transactions on Aerospace and Electronic Systems.