Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30172
Apply Super-SVA to SAR Imaging with Both Aperture Gaps and Bandwidth Gaps

Authors: Wenshuai Zhai, Yunhua Zhang

Abstract:

Synthetic aperture radar (SAR) imaging usually requires echo data collected continuously pulse by pulse with certain bandwidth. However in real situation, data collection or part of signal spectrum can be interrupted due to various reasons, i.e. there will be gaps in spatial spectrum. In this case we need to find ways to fill out the resulted gaps and get image with defined resolution. In this paper we introduce our work on how to apply iterative spatially variant apodization (Super-SVA) technique to extrapolate the spatial spectrum in both azimuthal and range directions so as to fill out the gaps and get correct radar image.

Keywords: SAR imaging, Sparse aperture, Stepped frequencychirp signal, high resolution, Super-SVA

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1073112

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1592

References:


[1] Nadav L, Mozeson E, "Nullifying ACF grating lobes in stepped-frequency train of LFM pulses," IEEE Trans. On Aerospace and Electronic Systems, vol.39, No.2, 2003, pp. 694 - 703.
[2] Zhang Q, Yeo T. S., Du G, "ISAR Imaging in Strong Ground Clutter by Using a New Stepped - Frequency Signal Format," IEEE Trans. Geosci. Remote Sensing, vol.41, No.5, 2003, pp.948 - 9521.
[3] Giovanni Alberti, Luigi Citarella, et al. "Current status of the development of an Italian airborne SAR system (MINISAR)," Proceedings of SPIE, 2004, Vol. 5236, pp. 53-59.
[4] I.Gladkova and D.Chebanov, "Suppression of grating lobes in stepped-frequency train," Proceedings of IEEE International Radar Conference, Arlington, Va, USA, May 2005, pp.371-376,
[5] Armin W. Doerry, "SAR Processing with Stepped Chirps and Phased Array Antennas ," SANDIA Report, SAND2006-5855, 2006.
[6] J. Salzman, D. Akamine, and R. Lefevre, "Interupted synthetic aperture radar(SAR)," Proc. IEEE National Radar Conference,2001, pp. 117-122
[7] Gerhard Krieger, Alberto Moreria, "Multistatic SAR satellite formations: potentials and challenges," IEEE Geoscience and Remote Sensing Symposium, Vol.4, July 2005, pp.2680-2684
[8] Stankwitz, H.C., Kosek, M.R., "Sparse aperture fill for SAR using Super-SVA," Proceedings of the 1996 IEEE National Radar Conference, 13-16 May 1996, pp.70 - 75.
[9] Long Zhuang, Xingzhao Liu, Zhixin Zhou, "Enhanced Resolution for sparse Aperture Radar Imaging Using Super-SVA," Proceedings of Asia-Pacific Microwave Conference 2007, pp.95-98
[10] Stankwitz, H.C., Kosek, M.R., "Super-Resolution for SAR/ISAR RCS Measurement Using Spatially Variant Apodization," Proceedings of Antenna Measurement Techniques Association (AMTA) 17th Annual Meeting and Symposium, Williamsburg, VA, 13-1 7 Nov 1995, pp. 251- 256.
[11] Xiaojian Xu and Ram M. Narayanan, "Enhanced Resolution in SAR/ISAR Imaging Using Iterative Sidelobe Apodization," IEEE Transactions on image processing, vol.14, No. 4, Apr 2005, pp. 537 - 547.
[12] Stankwitz H C, Dallaire R J, Fienup J R, "Nonlinear apodization for sidelobe control in SAR imagery," IEEE Trans. on Aerospace and Electronic Systems, vol.31, No.1, 1995, pp. 267 - 279.