volume | PIER Journals

Abstract

This paper presents a new range Doppler algorithm (RDA) for bistatic synthetic aperture radar (SAR) processing in a general configuration based on a bistatic point target reference spectrum: the improved extended Loffeld's bistatic formula (ILBF). The ILBF spectrum is proved to be comparably accurate with the spectrum derived using the method of series reversion (MSR). Based on the expansion of the ILBF spectrum, a new bistatic RDA is developed to process the azimuth invariant and variant bistatic SAR data. Compared with existing bistatic RDA, the new algorithm has a simpler formulation and is able to cope with moderate or high squint bistatic SAR data. The simulated data in the azimuth invariant and variant bistatic configurations are used to validate the new algorithm.

1. Sun, J., S. Mao, G.Wang, and W. Hong, "Extended exact transfer function algorithm for bistatic SAR of translational invariant case," Progress In Electromagnetics Research, Vol. 99, 89-108, 2009.
doi:10.2528/PIER09091203

2. Wu , J., J. Yang, Y. Huang, Z. Liu, and H. Yang, "A new look at the point target reference spectrum for bistatic SAR," Progress In Electromagnetics Research, Vol. 119, 363-379, 2011.
doi:10.2528/PIER11050704

3. Sun , J., S. Mao, G. Wang, and W. Hong, "Polar format algorithm for spotlight bistatic SAR with arbitrary geometry configuration," Progress In Electromagnetics Research, Vol. 103, 323-338, 2010.
doi:10.2528/PIER10030703

4. Mao, X., D.-Y. Zhu, Z.-D. Zhu, and , "Signatures of moving target in polar format spotlight SAR image," Progress In Electromagnetics Research, Vol. 92, 47-64, 2009.
doi:10.2528/PIER09030908

5. 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 Electromagnetics Research, Vol. 80, 447-460, 2008.
doi:10.2528/PIER07121409

6. Wang, X., D. Y. Zhu, and Z. D. Zhu, "An implementation of bistatic PFA using chirp scaling," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 4-5, 447-460, 2010.

7. Loffeld, O., H. Nives, et al. "Models and useful relations for bistatic SAR processing," IEEE Transactions on Geoscience and Remote Sensing, Vol. 42, No. 10, 2031-2038, 2004.
doi:10.1109/TGRS.2004.835295

8. Neo, Y. L., F. H. Wong, et al. "A two-dimensional spectrum for bistatic SAR processing using series reversion," IEEE Geoscience and Remote Sensing Letters, Vol. 4, No. 1, 93-96, Jan. 2007.
doi:10.1109/LGRS.2006.885862

9. Wang, R., O. Loffeld, et al. "A bistatic point target reference spectrum for general bistatic SAR processing," IEEE Geoscience and Remote Sensing letter, Vol. 5, No. 3, 517-521, 2008.
doi:10.1109/LGRS.2008.923542

10. Natroshvili , K. and O. Loffeld, "Focusing of general bistatic SAR configuration data with 2-D inverse scaled FFT," IEEE Transactions on Geoscience and Remote Sensing, Vol. 44, No. 10, 2718-2727, Oct. 2006.
doi:10.1109/TGRS.2006.872725

11. Li, F., S. Li, and Y. Zhao, "Focusing azimuth-invariant bistatic SAR data with chirp scaling," IEEE Geoscience and Remote Sensing letters, Vol. 5, No. 3, 484-486, Jul. 2008.
doi:10.1109/LGRS.2008.921743

12. Neo , Y. L., F. H. Wong, and I. G. Cumming, "Focusing bistatic SAR data using the nonlinear chirp scaling algorithm," IEEE Transactions on Geoscience and Remote Sensing, Vol. 46, No. 9, 2493-2505, 2008.
doi:10.1109/TGRS.2008.917599

13. Neo , Y. L., F. H. Wong, and I. G. Cumming, "A comparison of point target spectra derived for bistatic SAR processing," IEEE Transactions on Geoscience and Remote Sensing, Vol. 46, No. 9, 2481-2492, 2008.
doi:10.1109/TGRS.2008.919018

14. Wang, R., O. Loffeld, et al. "Extending Loffeld's bistatic formula for the general bistatic SAR configuration," IET Radar, Sonar & Naviga., Vol. 4, No. 1, 74-84, 2010.
doi:10.1049/iet-rsn.2009.0099

Dr. Xin Wang

Dr. Dai-Yin Zhu