volume | PIER Journals

Abstract

The synthetic aperture radar (SAR) signatures of moving target are the basis of ground moving target detection and imaging (GMTI&Im). 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, the spectrum of moving target after polar format algorithm (PFA) processing is derived. Based on this spectrum, detailed analysis on the SAR signatures of moving target, including the geometric displacement, residual range migration, and the defocusing effect in both range and azimuth dimensions are performed. Simulation results validate the theoretical analysis.

1. Storvold, R., E. Malnes, and Y. Larsen, "SAR remote sensing of snow parameters in Norwegian areas-current status and future perspective," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 13, 1751-1759, 2006.
doi:10.1163/156939306779292192 Google Scholar

2. Chan, Y. K. and S. Y. Lim, "An introduction to Synthetic Aperture Radar (SAR)," Progress In Electromagnetics Research B, Vol. 2, 27-60, 2008.
doi:10.2528/PIERB07110101 Google Scholar

3. Storvold, R., E. Malnes, Y. Larsen, K. A. Hogda, and S. E. Hamran, "SAR remote sensing of snow parameters in norwegian areas-current status and future perspective," Journal of Electromagnetic Waves and Applications, Vol. 20, No. 13, 1751-1759, 2006.
doi:10.1163/156939306779292192 Google Scholar

4. Nie, X., D. Y. Zhu, and Z. D. Zhu, "Application of synthetic bandwidth approach in SAR polar format algorithm using the deramp technique," Progress In Electromagetics Research, PIER 80, 447-460, 2008. Google Scholar

5. Wu, B. I., M. Yeuing, and Y. Hara, "Insar heigh inversion by using 3-D phase projection with multiple baselines," Progress In Electromagnetics Reseach, PIER 91, 173-193, 2009. Google Scholar

6. Lim, T. S., C. S. Lim, and V. C. Koo, "Autofocus algorithm performance evaluations using an integrated SAR product simulator and processor," Progress In Electromagnetics Reseach B, Vol. 3, 315-329, 2008.
doi:10.2528/PIERB07122101 Google Scholar

7. Ebrahimi-Ganjeh, M. A. and A. R. Attari, "Study of water bolus effect on SAR penetration depth and effective field size for local hyperthermia," Progress In Electromagnetics Reseach B, Vol. 4, 273-283, 2008.
doi:10.2528/PIERB08011403 Google Scholar

8. Raney, R. K., "Synthetic aperture radar imaging radar and moving targets," IEEE Transactions on Aerospace and Electronic Systems, 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 Journal of Research, Vol. 5, No. 2, 106-115, 1987. Google Scholar

10. Chen, V. C., R. Lipps, and M. Bottoms, "Advanced synthetic aperture radar imaging and feature analysis," Proc. of IEEE International Radar Conference, 22-29, 2003. Google Scholar

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

12. Jao, J. K., "“Thoery of synthetic aperture radar imaging of a moving target ," IEEE Transactions on Geoscience and Remote Sensing, Vol. 39, No. 9, 1984-1992, 2001.
doi:10.1109/36.951089 Google Scholar

13. Yegulalp, A. F., "Analysis of SAR image formation s for stationary and moving targets,", MIT Technical Report, 2002. Google Scholar

14. Doerry, A. W., "SAR processing with stepped chirps and phased array antennas,", Sandia Report, 2006. Google Scholar

15. Perry, R. P., R. C. Dipietro, and R. L. Fante, "SAR imaging of moving targets," IEEE Transactions on Aerospace and Electronic Systems, Vol. 35, No. 1, 188-200, 1999.
doi:10.1109/7.745691 Google Scholar

Dr. Xinhua Mao

Dr. Dai-Yin Zhu

Dr. Zhao-Da Zhu