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Generalized Frequency-Domain SAR Processing.
- Source :
-
IEEE Transactions on Geoscience & Remote Sensing . Nov2009, Vol. 47 Issue 11, p3761-3773. 13p. 4 Charts, 15 Graphs. - Publication Year :
- 2009
-
Abstract
- The range-Doppler algorithm and the chirp-scaling algorithm (CSA) process synthetic aperture radar (SAR) data with approximations to ideal SAR processing. These approximations are invalid for data from systems with wide beamwidths, large bandwidths, and/or low center frequencies. While simple efficient, these frequency-domain methods are thus limited by SAR parameters. This paper explores these limits and proposes a generalized chirp-scaling approach for extending the utility of frequency-domain processing. We demonstrate how different order approximations of the SAR signal in the 2-D frequency domain affect image focusing for varying SAR parameters. From these results, a guideline is set forth, which suggests the required order of approximation terms for proper focusing. A proposed generalized frequency-domain processing approach is derived. This method is an efficient arbitrary-order CSA that processes data using the appropriate number of approximation terms. The new method is demonstrated using simulated data. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01962892
- Volume :
- 47
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Geoscience & Remote Sensing
- Publication Type :
- Academic Journal
- Accession number :
- 45448045
- Full Text :
- https://doi.org/10.1109/TGRS.2009.2025372