W-band sparse synthetic aperture for computational imaging

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Publication Type journal article
School or College College of Engineering
Department Electrical & Computer Engineering
Creator Venkatesh, Suresh
Other Author Viswanathan, N.; Schurig, D.
Title W-band sparse synthetic aperture for computational imaging
Date 2016-04-08
Description We present a sparse synthetic-aperture, active imaging system at W-band (75 - 110 GHz), which uses sub-harmonic mixer modules. The system employs mechanical scanning of the receiver module position, and a fixed transmitter module. A vector network analyzer provides the back end detection. A full-wave forward model allows accurate construction of the image transfer matrix. We solve the inverse problem to reconstruct scenes using the least squares technique. We demonstrate far-field, diffraction limited imaging of 2D and 3D objects and achieve a cross-range resolution of 3 mm and a depth-range resolution of 4 mm, respectively. Furthermore, we develop an information-based metric to evaluate the performance of a given image transfer matrix for noise-limited, computational imaging systems. We use this metric to find the optimal gain of the radiating ele­ ment for a given range, both theoretically and experimentally in our system.
Type Text
Publisher Optical Society of America
Volume 24
Issue 8
First Page 8317
Last Page 8331
Language eng
Bibliographic Citation Venkatesh, S., Viswanathan, N., & Schurig, D. (2016). W-band sparse synthetic aperture for computational imaging. Optical Society of American, 24(8), 8317-31.
Rights Management (c) Optical Society of America Received 27 Oct 2015; revised 14 Mar 2016; accepted 16 Mar 2016; published 8 Apr 2016 18 Apr 2016 | Vol. 24, No. 8 | DOI:10.1364/OE.24.008317 | OPTICS EXPRESS 8317
Format Medium application/pdf
Format Extent 630,675 bytes
Identifier uspace,19433
ARK ark:/87278/s6h16b6m
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Reference URL https://collections.lib.utah.edu/ark:/87278/s6h16b6m