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2 September 2004 Region-enhanced imaging for sparse-aperture passive radar
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We present the application of a recently-developed region-enhanced synthetic aperture radar (SAR) image reconstruction technique to the problem of passive radar imaging. One goal in passive radar imaging is to form images of aircraft using signals transmitted by commercial radio and television stations, which then get reflected from the objects of interest. This involves reconstructing an image from sparse samples of its Fourier transform. Due to the sparse nature of the aperture, a conventional image formation approach based on direct Fourier transformation results in quite dramatic artifacts in the image, as compared to the case of active SAR imaging. The region-enhanced image formation method we consider appears to significantly reduce such artifacts, and preserve the features of the imaged object. Furthermore, this approach exhibits robustness to measurement noise. We demonstrate our results using data based on electromagnetic simulations.
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Mujdat Cetin and Aaron D. Lanterman "Region-enhanced imaging for sparse-aperture passive radar", Proc. SPIE 5427, Algorithms for Synthetic Aperture Radar Imagery XI, (2 September 2004);

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