Spotlight-mode synthetic aperture radar without Fourier transforms

Jordan Mann; Robert A. Hummel

doi:10.1117/12.177167

9 June 1994 Spotlight-mode synthetic aperture radar without Fourier transforms

Jordan Mann, Robert A. Hummel

Proceedings Volume 2230, Algorithms for Synthetic Aperture Radar Imagery; (1994) https://doi.org/10.1117/12.177167
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

The spotlight mode SAR (SPSAR) image reconstruction problem may be solved using a backprojection algorithm in the spatial domain while the radar return signals being recorded. The resulting SPSAR algorithm, studied by Desai and Jenkins, permits parallelization of the image reconstruction, and obviates a costly Fourier-domain resampling step. We show that by using a radar signal of a specially designed form with backprojection, the reconstruction becomes extremely simple, eliminating the need for Fourier processing of the return signals, by incorporating a derivative of a Hilbert transform into the emitted signal. We show some simulation results using this new method. We also briefly discuss an algorithm for reconstruction of a function residing on a hemisphere from its radar returns without geometric approximation or distortion.

Citation Download Citation

Jordan Mann and Robert A. Hummel "Spotlight-mode synthetic aperture radar without Fourier transforms", Proc. SPIE 2230, Algorithms for Synthetic Aperture Radar Imagery, (9 June 1994); https://doi.org/10.1117/12.177167

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KEYWORDS

Fourier transforms

Reconstruction algorithms

Radar

Antennas

Convolution

Radon transform

Wavelets

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