ABSTRACT
Improvements based on DPCA–Fractional Fourier Transform(FrFT) are presented in this paper, so as to improve the performance of moving target detection and parameters’ estimation: firstly, aiming at the problem of acceleration in range, it is used as a parameter of moving target and estimated, this parameter mainly affects doppler rate; secondly, aiming at the problem of complicated system, this paper not only uses FrFT to estimate the doppler parameters of moving target, but also uses the maximum value of signal energy after FrFT. It can realize the detection and parameters’ estimation of moving target in dual-channel SAR and simplifies the structure of SAR's system; finally, due to the presence of noise in SAR's system, moving target's reflection coefficient is not an ideal value; The reflection coefficient is estimated by the amplitude averaging method to solve the problem, so as to improve the accuracy of parameters’ estimation of moving target.
- Chapin E, Chen C W. Preliminary results from an airborne experiment using along-track interferometry for ground moving target indication[C]// Radar Conference, 2005 IEEE International. IEEE, 2005:343-347.Google Scholar
- Baumgartner S V, Krieger G. Fast GMTI Algorithm For Traffic Monitoring Based On A Priori Knowledge[J]. IEEE Transactions on Geoscience & Remote Sensing, 2012, 50(11):4626-4641.Google ScholarCross Ref
- Raney R K. Synthetic Aperture Imaging Radar and Moving Targets[J]. Aerospace & Electronic Systems IEEE Transactions on, 1971, AES-7(3):499-505.Google ScholarCross Ref
- Freeman A, Currie A. Synthetic aperture radar (SAR) images of moving targets[J]. Gec Journal Research, 2012, 5(5):106-115.Google Scholar
- Klemm R. Principles of space-time adaptive processing[M]. 2002.Google Scholar
- Barbarossa S, Farina A. A novel procedure for detecting and focusing moving objects with SAR based on the Wigner-Ville distribution[C]// Radar Conference, 1990. Record of the IEEE 1990 International. IEEE, 1990:44-50.Google Scholar
- Barbarossa S. Detection and imaging of moving objects with synthetic aperture radar. 1. Optimal detection and parameter estimation theory[J]. IEE Proceedings F - Radar and Signal Processing, 1992, 139(1):79-88.Google ScholarCross Ref
- Moreira J R, Keydel W. A new MTI-SAR approach using the reflectivity displacement method[J]. Geoscience & Remote Sensing IEEE Transactions on, 1995, 33(5):1238-1244.Google ScholarCross Ref
- Perry R P, Dipietro R C, Fante R. SAR imaging of moving targets[J]. IEEE Transactions on Aerospace & Electronic Systems, 1999, 35(1):188-200.Google ScholarCross Ref
- Fienup J R. Detecting moving targets in SAR imagery by focusing[J]. IEEE Transactions on Aerospace & Electronic Systems, 2001, 37(3):794-809.Google ScholarCross Ref
- Sikaneta I. SPECAN filtering for dual-channel stripmap-SAR GMTI[C]// Geoscience and Remote Sensing Symposium, 2005. IGARSS '05. Proceedings. 2005 IEEE International. IEEE, 2005:2942-2945.Google Scholar
- Lightstone L, Faubert D, Rempel G. Multiple phase centre DPCA for airborne radar[C]// Radar Conference, 1991. Proceedings of the 1991 IEEE National. IEEE, 2002:36-40.Google Scholar
- Gierull C H, Sikaneta I C. Raw data based two-aperture SAR ground moving target indication[C]// Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International. IEEE, 2003:1032-1034.Google Scholar
- Sikaneta I, Gierull C. Ground moving target detection for along-track interferometric SAR data[C]// Aerospace Conference, 2004. Proceedings. IEEE, 2004:2227-2235.Google Scholar
- Shen C. Clutter effects on ground moving target velocity estimation with SAR along-track interferometry[C]// Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International. IEEE, 2003:1314-1319.Google Scholar
- Klemm R. Adaptive airborne MTI with tapered antenna arrays[J]. IEE Proceedings - Radar, Sonar and Navigation, 2002, 145(1):3-8.Google ScholarCross Ref
- Fuhrmann D R, Boggio L A, Maschmeyer J, Clutter scattering function estimation and ground moving target detection from multiple STAP datacubes[C]// Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on. IEEE, 2005:593-596.Google Scholar
- Cafforio C, Guccione P, Monti Guarnieri A. Doppler centroid estimation for ScanSAR data.[J]. IEEE Transactions on Geoscience & Remote Sensing, 2004, 42(1):14-23.Google ScholarCross Ref
- Ortiz A M, Loffeld O, Knedlik S, Comparison of doppler centroid estimators in bistatic airborne SAR[C]// IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2005:1963-1966.Google Scholar
- Zang T F, Long T, Nan R, Estimating the Doppler Frequency Rate for Spaceborne SAR Data with a New Approach[C]// Cie International Cenfevence on Radar Proceedings. 2001:627-630.Google Scholar
- Sejdić E, Djurović I, Stanković L. Fractional Fourier transform as a signal processing tool: An overview of recent developments[J]. Signal Processing, 2011, 91(6):1351-1369.Google ScholarDigital Library
- Skolnik M I. Introduction to radar systems / M.I. Skolnik[J]. McGraw-Hill electrical engineering series, 2001(2).Google Scholar
- Smith A M. A new approach to range-Doppler SAR processing[J]. International Journal of Remote Sensing, 1991, 12(2):235-251.Google ScholarCross Ref
- Zhu S Q, Liao G S, Qu Y, Ground moving targets detection and unambiguous motion parameter estimation based on multi-channel SAR system[C]// Radar Conference, 2009 IET International. IET, 2009:1-4.Google Scholar
Index Terms
- Moving targets detection and parameters estimation based on DPCA and FrFT in dual-channel SAR
Recommendations
Robust moving targets detection and velocity estimation using multi-channel and multi-look SAR images
For the sake of the robustness to ground moving targets indication (GMTI) for synthetic aperture radar (SAR) in heterogeneous environment, a new approach using multi-channel and multi-look SAR images is presented. This approach has been shown to attain ...
Detection of ground moving targets for two-channel spaceborne SAR-ATI
Special issue on advances in multidimensional synthetic aperture radar signal processingMany present spaceborne synthetic aperture radar (SAR) systems are constrained to only two channels for ground moving target indication (GMTI). Along-track interferometry (ATI) technique is currently exploited to detect slowly moving targets and measure ...
Parameter Estimations Based on DPCA-FrFT Algorithm for Three-channel SAR-GMTI System
ICICTA '11: Proceedings of the 2011 Fourth International Conference on Intelligent Computation Technology and Automation - Volume 02On the basis of deep analysis of DPCA technique and FrFT, the DPCA-FrFT algorithm which can realize detection and parameter estimations of moving target for three-channel SAR-GMTI system, is presented in this paper. Because of the good capability of ...
Comments