NDLI: Synthetic Aperture Imaging of Multiple Point Targets in Rician Fading Media

Content Provider	Society for Industrial and Applied Mathematics (SIAM)
Author	Fannjiang, Albert C. Yan, Pengchong Solna, Knut
Copyright Year	2009
Abstract	This paper presents a study of stability, resolution, and detection for broad-band synthetic aperture (SA) imaging in Rician fading media. The stability condition $BNK^2/(K+1)\gg M$ is derived, where K is the Rician factor, B is the effective number of coherence bands, N is the effective number of array elements, and M is the number of (widely separated) targets. The imaging method is tested numerically with randomly distributed discrete scatterers, and comparisons with the imaging with the full response matrix (RM) are made. The resolution study reveals several interesting effects: First, given the same measurement resources, SA imaging has better resolution performance, although less stable, than RM imaging; second, for both imaging methods, the cross-range resolution measure (i.e., full width at half maximum) decreases with the aperture (N fixed) and the probe spacing (the total aperture fixed) while the range resolution increases with both parameters. A statistical scheme is introduced to reduce the uncertainty when the stability regime is not realized.
Starting Page	344
Ending Page	366
Page Count	23
File Format	PDF
DOI	10.1137/080728937
e-ISSN	19364954
Journal	SIAM Journal on Imaging Sciences (SJISBI)
Issue Number	2
Volume Number	2
Language	English
Publisher	Society for Industrial and Applied Mathematics
Publisher Date	2009-04-01
Access Restriction	Subscribed
Subject Keyword	synthetic aperture Inverse scattering problems Detection theory response matrix resolution stability Rician fading
Content Type	Text
Resource Type	Article

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