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.

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

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

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

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

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

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

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

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

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

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

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.

Dr. Yuebo Zha

Dr. Wei Pu