POS  Vol.4 No.1 , February 2013
A New Factorized Backprojection Algorithm for Stripmap Synthetic Aperture Radar
ABSTRACT
Factorized backprojection is a processing algorithm for reconstructing images from data collected by synthetic aperture radar (SAR) systems. Factorized backprojection requires less computation than conventional time-domain backprojection with minimal loss in accuracy for straight-line motion. However, its implementation is not as straightforward as direct backprojection. This paper provides a new, easily parallelizable formulation of factorized backprojection designed for stripmap SAR data that includes a method of implementing an azimuth window as part of the factorized backprojection algorithm. We compare the performance of windowed factorized backprojection to direct backprojection for simulated and actual SAR data.

Cite this paper
Moon, K. and Long, D. (2013) A New Factorized Backprojection Algorithm for Stripmap Synthetic Aperture Radar. Positioning, 4, 42-56. doi: 10.4236/pos.2013.41006.
References
[1]   C. Elachi, “Spaceborne Radar Remote Sensing: Applications and Techniques,” IEEE Press, New York, 1988, pp. 72–77.

[2]   L. Ulander, H. Hellsen and G. Stenstrom, “Synthetic Aperture Radar Processing Using Fast Factorized Back-Projection,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 39, No. 3, 2003, pp. 760-776. doi:10.1109/TAES.2003.1238734

[3]   I. Cumming and F. Wong, “Digital Processing of Synthetic Aperture Radar Data,” Artech House, Norwood, 2005.

[4]   M. Rofheart and J. McCorkle, “An Order N2 log N Backprojection Algorithm for Focusing Wide Angle Wide Bandwidth Arbitrary-Motion Synthetic Aperture Radar,” SPIE Radar Sensor Technology Conference Proceedings, Orlando, 8 April 1996, pp. 25-36.

[5]   A. Hunter, M. Hayes and P. Gough, “A Comparison of Fast Factorised Back-Projection and Wavenumber Algorithms,” Fifth World Congress on Ultrasonics, Paris, 7-10 September 2003, pp. 527-530.

[6]   S. Oh and J. McClellan, “Multiresolution Imaging with Quadtree Backprojection,” 35th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, 4-7 January 2001, pp. 105-109.

[7]   S. Basu and Y. Bresler, “ Filtered Backprojection Reconstruction Algorithm for Tomography,” IEEE Transactions on Image Processing, Vol. 9, No. 10, 2000, pp. 1760-1773. doi:10.1109/83.869187

[8]   H. Callow and R. Hansen, “Fast Factorized Back Projection for Synthetic Aperture Imaging and Wide-Beam Motion Compensation,” Proceedings of the Institute of Acoustics, Vol. 28, 2006, pp. 191-200.

[9]   J. Xiong, J. Chen, Y. Huang, J. Yang, Y. Fan and Y. Pi, “Analysis and Improvement of a Fast Backprojection Algorithm for Stripmap Bistatic SAR Imaging,” 7th European Conference on Synthetic Aperture Radar (EUSAR), June 2008, pp. 1-4.

[10]   S. Xiao, D. C. Munson, S. Basu and Y. Bresler, “An N2logN Back-Projection Algorithm for SAR Image Formation,” Proceedings of the 34th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, 29 October-1 November 2000, pp. 3-7.

[11]   M. Rodriguez-Cassola, P. Prats, G. Krieger and A. Moreira, “Efficient Time-Domain Image Formation with Precise Topography Accommodation for General Bistatic Sar Configurations,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 47, No. 4, 2011, pp. 2949-2966. doi:10.1109/TAES.2011.6034676

[12]   A. Ribalta, “Time-Domain Reconstruction Algorithms for FMCW-SAR,” IEEE Geoscience and Remote Sensing Letters, Vol. 8, No. 3, 2011, pp. 396-400. doi:10.1109/LGRS.2010.2078486

[13]   K. M. Moon, “Windowed Factorized Backprojection for Pulsed and LFM-CW SAR,” Master’s Thesis, Brigham Young University, Provo, 2012.

[14]   M. Brandfass and L. Lobianco, “Modified Fast Factorized Backprojection as Applied to X-Band Data for Curved Flight Paths,” 7th European Conference on Synthetic Aperture Radar (EUSAR), June 2008.

[15]   L. Ulander and P. Frolind, “Evaluation of Angular Interpolation Kernels in Fast Back-Projection SAR Processing,” IEE Proceedings on Radar, Sonar, and Navigation, Vol. 153, No. 3, 2006, pp. 243-249.

 
 
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