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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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. Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

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 Google Scholar

Dr. Xin Wang

Dr. Dai-Yin Zhu