volume | PIER Journals

Abstract

With appropriate geometry configurations, bistatic Synthetic Aperture Radar (SAR) can break through the limitations of monostatic SAR on forward-looking imaging. Thanks to such a capability, bistatic forward-looking SAR (BFSAR) has extensive potential applications. For the focusing problem of BFSAR, wavenumber-domain algorithm is accepted as the ideal solution. However, in practical application, the processing is limited because of its inability to combine the range-dependent motion compensation (MoCo). To cope with such a problem, an extended wavenumber-domain algorithm for BFSAR is derived in this paper. By modifying the reference function and mapping relationship in frequency interpolation, the extended wavenumber-domain algorithm of BFSAR integrates a two-step motion compensation. Simulation results verify the effectiveness of the proposed method.

1. Wu, J., J. Yang, Y. Huang, H. Yang, and H. Wang, "Bistatic forward-looking SAR: Theory and challenges," 2009 IEEE Radar Conference, 1-4, IEEE, 2009. Google Scholar

2. Pu, P., J. Yang, Y. Huang, H. Yang, and W. Li, "A residual range cell migration correction algorithm for SAR based on low-frequency fitting," 2015 IEEE Radar Conference, 1300-1304, IEEE, 2015.
doi:10.1109/RADAR.2015.7131196 Google Scholar

3. Qiu, X., D. Hu, and C. Ding, "Some reflections on bistatic SAR of forward-looking configuration," IEEE Geoscience and Remote Sensing Letters, Vol. 5, No. 4, 735-739, 2008.
doi:10.1109/LGRS.2008.2004506 Google Scholar

4. Wu, J., J. Yang, Y. Huang, and H. Yang, "Focusing bistatic forward-looking SAR using chirp scaling algorithm," 2011 IEEE Radar Conference (RADAR), 1036-1039, IEEE, 2011.
doi:10.1109/RADAR.2011.5960693 Google Scholar

5. Li, Z., J. Wu, W. Li, Y. Huang, and J. Yang, "One-stationary bistatic side-looking sar imaging algorithm based on extended keystone transforms and nonlinear chirp scaling," IEEE Geoscience and Remote Sensing Letters, Vol. 10, No. 2, 211-215, 2013.
doi:10.1109/LGRS.2012.2198611 Google Scholar

6. Wu, J., Z. Li, Y. Huang, J. Yang, H. Yang, and Q. H. Liu, "Focusing bistatic forward-looking SAR with stationary transmitter based on keystone transform and nonlinear chirp scaling," IEEE Geoscience and Remote Sensing Letters, Vol. 11, No. 1, 148-152, Jan. 2014.
doi:10.1109/LGRS.2013.2250904 Google Scholar

7. Shin, H.-S. and J.-T. Lim, "Omega-k algorithm for airborne forward-looking bistatic spotlight SAR imaging," IEEE Geoscience and Remote Sensing Letters, Vol. 6, No. 2, 312-316, 2009.
doi:10.1109/LGRS.2008.2011924 Google Scholar

8. Reigber, A., E. Alivizatos, A. Potsis, and A. Moreira, "Extended wavenumber-domain synthetic aperture radar focusing with integrated motion compensation," IEE Proceedings --- Radar, Sonar and Navigation, Vol. 153, No. 3, 301-310, Jun. 2006.
doi:10.1049/ip-rsn:20045087 Google Scholar

9. Loffeld, O., H. Nies, V. Peters, and S. Knedlik, "Models and useful relations for bistatic SAR processing," GIEEE Transactions on eoscience and Remote Sensing, Vol. 42, No. 10, 2031-2038, Oct. 2004.
doi:10.1109/TGRS.2004.835295 Google Scholar

10. Neo, Y. L., F.Wong, and I. G. Cumming, "A two-dimensional spectrum for bistatic SAR processing using series reversion," IEEE Geoscience and Remote Sensing Letters, Vol. 4, No. 1, 93-96, 2007.
doi:10.1109/LGRS.2006.885862 Google Scholar

11. Liu, H., T. Wang, Q. Wu, and Z. Bao, "Bistatic SAR data focusing using an Omega-k algorithm based on method of series reversion," IEEE Transactions on Geoscience and Remote Sensing, Vol. 47, No. 8, 2899-2912, 2009.
doi:10.1109/TGRS.2009.2017522 Google Scholar

12. Yang, J., Y. Huang, H. Yang, J. Wu, W. Li, Z. Li, and X. Yang, "A first experiment of airborne bistatic forward-looking SAR --- Preliminary results," Proc. IGARSS, 4202-4204, Melbourne, VIC, Jul. 2013. Google Scholar

Dr. Yuebo Zha

Dr. Wei Pu