&lt;title&gt;Wide-angle wideband SAR matched filter image formation for enhanced detection performance&lt;/title&gt;

Allen, Mark R.; Hoff, Lawrence E.

doi:10.1117/12.177181

Cited by 28 publications

(10 citation statements)

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“…In this paper, we propose an SAR image formation algorithm which is fit for stripmap and large beamwave angle SAR with multipath ghosts suppression. The algorithm resembles to the target detection method in UWB SAR images [5] and its theoretic foundation is the above aspect dependence. The steps of our algorithm as follows: a) By sub-aperture filtered in doppler frequency domain, echo data willform a series ofimages.…”

Section: Introductionmentioning

confidence: 99%

Research on UWB SAR Image Formation with Suppressing Multipath Ghosts

Wang

Huang

Zhou

et al. 2006

2006 CIE International Conference on Radar

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Conventional SAR image formation algorithms can not remove the interference from multipath spreading events, so SAR images appear as ghosts. In this paper a multipath scattering model fit for stripmap SAR has been founded. By analyzing the model, we have obtained three characters of multipath ghosts, which are aspect dependence, lower resolution and non-ideal focusing. For low frequency band and large beamwidth SAR, the aspect dependence of ghosts is more remarkable. We hereby propose an ultra-wide band (UWB) SAR image formation algorithm with suppressing multipath ghosts. Simulations show that this algorithm may improve the peak value ratio between real and false targets about 1318 dB.

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Section: Introductionmentioning

confidence: 99%

Research on UWB SAR Image Formation with Suppressing Multipath Ghosts

Wang

Huang

Zhou

et al. 2006

2006 CIE International Conference on Radar

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“…The idea is to use a bank of K matched filters, each characterized by a center response azimuth and a response width and shape. 4,5 Each of these matched filter outputs is an image conventionally reconstructed from a subaperture of the full azimuth aperture. The underlying assumption is that it is reasonable to assume isotropic scattering within the angular extent of these subapertures.…”

Section: Composite Image Formationmentioning

confidence: 99%

SAR imaging from partial-aperture data with frequency-band omissions

Çetin

Moses

2005

Algorithms for Synthetic Aperture Radar Imagery XII

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We consider the problem of wide-angle SAR imaging from data with arbitrary frequency-band omissions. We propose an approach that involves composite image formation through combination of subaperture images, as well as point-enhanced, superresolution image reconstruction. This framework provides a number of desirable features including preservation of anisotropic scatterers that do not persist over the full wide-angle aperture; robustness to bandwidth limitations and frequency-band omissions; as well as a characterization of the aspect dependence of scatterers. We present experimental results based on the Air Force Research Laboratory (AFRL) "Backhoe Data Dome," demonstrating the effectiveness of the proposed approach.

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“…6 As a computational saving, the matched lter may be truncated at, say, its 3dB points. 1,3 Let h1 denote the matched lter and h2 the 3dB truncated matched lter. As a further computational saving, h2 can be approximated by a uniform amplitude lter, denoted by h3 (see Fig.6).…”

Section: Glrt Perormancementioning

confidence: 99%

<title>Performance analysis of anisotropic scattering center detection</title>

1997

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We consider the problem of detecting anisotropic scattering of targets from wideband SAR measurements. We r s t develop a scattering model for the response of an ideal dihedral when interrogated by a wideband radar. We f o r m ulate a s t o c hastic detection problem based on this model and Gaussian clutter models. We i n vestigate the performance of three detectors, the conventional imaging detector, a generalized likelihood ratio test (GLRT) detector based on the dihedral anisotropic scattering model, and a sum-of-squares detector motivated as a computationally attractive alternative to the GLRT test. We a l s o i n vestigate the performance degradation of the GLRT detector when using truncated angle response lters, and analyze detector sensitivity to changes in target length. Finally, we present initial results of angular matched lter detection applied to UWB radar measurements collected by the Army Research Laboaratory at Aberdeen Proving Grounds.

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<title>Wide-angle wideband SAR matched filter image formation for enhanced detection performance</title>

Cited by 28 publications

References 0 publications

Research on UWB SAR Image Formation with Suppressing Multipath Ghosts

Research on UWB SAR Image Formation with Suppressing Multipath Ghosts

SAR imaging from partial-aperture data with frequency-band omissions

<title>Performance analysis of anisotropic scattering center detection</title>

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