volume | PIER Journals

Abstract

The synthetic aperture radar (SAR) signatures of moving target are the basis of ground moving target indication and imaging (GMTI&Im) in the framework of SAR systems. However, previous studies are mainly based on the 2-D separable SAR processing, and little work has been done to investigate the signatures of moving target after the application of a particular fine resolution SAR image formation algorithm. In this paper, we derive the image spectrum of moving target after two representative fine resolution SAR image formation algorithms, i.e., the range migration algorithm (RMA) and polar format algorithm (PFA), respectively. Based on the spectrum derived, detailed analysis on the SAR signatures of moving target, including the geometric displacement, residual range migration, and defocusing effect in both the range and azimuth dimensions are performed. The presented work might be helpful when considering a SAR system with the capability of ground moving target indication and imaging (GMTI&Im).

1. Kong, J. A., S. H. Yueh, H. H. Lim, R. T. Shin, and J. J. van Zyl, "Classification of earth terrain using polarimetric synthetic aperture radar images," Progress In Electromagnetics Research, Vol. 3, 327-370, 1990. Google Scholar

2. Lim, K.-S. and V. C. Koo, "Design and construction of wideband vna ground-based radar system with real and synthetic aperture measurement capabilities," Progress In Electromagnetics Research, Vol. 86, 259-275, 2008.
doi:10.2528/PIER08092204 Google Scholar

3. Carrara, W. G., R. S. Goodman, and R. M. Majewski, Spotlight Synthetic Aperture Radar: Signal Processing Algorithms, Artech House, Norwood, MA, 1995.

4. Chan, Y. K. and V. C. Koo, "An introduction to synthetic aperture radar (SAR)," Progress In Electromagnetics Research B, Vol. 2, 27-60, 2008.
doi:10.2528/PIERB07110101 Google Scholar

5. Sabry, R. and P. W. Vachon, "Advanced polarimetric synthetic aperture radar (SAR) and electro-optical (eo) data fusion through unified coherent formulation of the scattered EM field," Progress In Electromagnetics Research, Vol. 84, 189-203, 2008.
doi:10.2528/PIER08071005 Google Scholar

6. Lim, K.-S. and V. C. Koo, "Design and construction of wideband vna ground-based radar system with real and synthetic aperture measurement capabilities," Progress In Electromagnetics Research, Vol. 86, 259-275, 2008.
doi:10.2528/PIER08092204 Google Scholar

7. Zheng, W., Z. Zhao, and Z.-P. Nie, "Application of TRM in the UWB through wall radar," Progress In Electromagnetics Research, Vol. 87, 279-296, 2008.
doi:10.2528/PIER08101202 Google Scholar

8. Raney, R. K., "Synthetic aperture imaging radar and moving targets," IEEE Trans. Aerosp. Electron. Syst., Vol. 7, No. 3, 499-505, 1971.
doi:10.1109/TAES.1971.310292 Google Scholar

9. Freeman, A. and A. Currie, "Synthetic aperture radar (SAR) images of moving targets," GEC J. Res., Vol. 5, No. 2, 106-115, 1987. Google Scholar

10. Chen, V. C., "Radar imaging of ground moving targets," Proc. IEEE Radar Conf., 426-431, Atlanta, GA, 2001. Google Scholar

11. Perry, R. P., R. C. Dipietro, and R. L. Fante, "SAR imaging of moving targets," IEEE Trans. Aerosp. Electron. Syst., Vol. 35, No. 1, 188-200, 1999.
doi:10.1109/7.745691 Google Scholar

12. Choi, G. G., S. H. Park, H. T. Kim, and K. T. Kim, "ISAR imaging of multiple targets based on particle swarm optimization and hough transform," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 14-15, 1825-1834, 2009.
doi:10.1163/156939309789932322 Google Scholar

13. Bimpas, M., N. Paraskevopoulos, K. Nikellis, D. Economou, and N. K. Uzunoglu, "Development of a three band radar system for detecing trapped alive humans under building ruins," Progress In Electromagnetics Research, Vol. 49, 161-188, 2004.
doi:10.2528/PIER04030501 Google Scholar

14. Doerry, A. W., "SAR processing with stepped chirps and phased array antennas," Sandia National Laboratories, Albuquerque, New Mexico, 2006. Google Scholar

15. Minardi, M. J. and E. G. Zelnio, "Comparison of SAR based GMTI and standard GMTI in a dense target environment," Proc. SPIE, 2006. Google Scholar

Dr. Xinhua Mao

Dr. Dai-Yin Zhu

Dr. Lan Ding

Dr. Zhao-Da Zhu