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Title: Joint synthetic aperture radar plus ground moving target indicator from single-channel radar using compressive sensing

Abstract

The various embodiments presented herein relate to utilizing an operational single-channel radar to collect and process synthetic aperture radar (SAR) and ground moving target indicator (GMTI) imagery from a same set of radar returns. In an embodiment, data is collected by randomly staggering a slow-time pulse repetition interval (PRI) over a SAR aperture such that a number of transmitted pulses in the SAR aperture is preserved with respect to standard SAR, but many of the pulses are spaced very closely enabling movers (e.g., targets) to be resolved, wherein a relative velocity of the movers places them outside of the SAR ground patch. The various embodiments of image reconstruction can be based on compressed sensing inversion from undersampled data, which can be solved efficiently using such techniques as Bregman iteration. The various embodiments enable high-quality SAR reconstruction, and high-quality GMTI reconstruction from the same set of radar returns.

Inventors:
; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1399911
Patent Number(s):
9,791,563
Application Number:
14/591,519
Assignee:
National Technology & Engineering Solutions of Sandia, LLC SNL-A
DOE Contract Number:
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Jan 07
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Thompson, Douglas, Hallquist, Aaron, and Anderson, Hyrum. Joint synthetic aperture radar plus ground moving target indicator from single-channel radar using compressive sensing. United States: N. p., 2017. Web.
Thompson, Douglas, Hallquist, Aaron, & Anderson, Hyrum. Joint synthetic aperture radar plus ground moving target indicator from single-channel radar using compressive sensing. United States.
Thompson, Douglas, Hallquist, Aaron, and Anderson, Hyrum. Tue . "Joint synthetic aperture radar plus ground moving target indicator from single-channel radar using compressive sensing". United States. doi:. https://www.osti.gov/servlets/purl/1399911.
@article{osti_1399911,
title = {Joint synthetic aperture radar plus ground moving target indicator from single-channel radar using compressive sensing},
author = {Thompson, Douglas and Hallquist, Aaron and Anderson, Hyrum},
abstractNote = {The various embodiments presented herein relate to utilizing an operational single-channel radar to collect and process synthetic aperture radar (SAR) and ground moving target indicator (GMTI) imagery from a same set of radar returns. In an embodiment, data is collected by randomly staggering a slow-time pulse repetition interval (PRI) over a SAR aperture such that a number of transmitted pulses in the SAR aperture is preserved with respect to standard SAR, but many of the pulses are spaced very closely enabling movers (e.g., targets) to be resolved, wherein a relative velocity of the movers places them outside of the SAR ground patch. The various embodiments of image reconstruction can be based on compressed sensing inversion from undersampled data, which can be solved efficiently using such techniques as Bregman iteration. The various embodiments enable high-quality SAR reconstruction, and high-quality GMTI reconstruction from the same set of radar returns.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 17 00:00:00 EDT 2017},
month = {Tue Oct 17 00:00:00 EDT 2017}
}

Patent:

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  • A method and apparatus for improving the performance of Synthetic Aperture Radar (SAR) systems by reducing the effect of "edge losses" associated with nonuniform receiver antenna gain. By moving the receiver antenna pattern in synchrony with the apparent motion of the transmitted pulse along the ground, the maximum available receiver antenna gain can be used at all times. Also, the receiver antenna gain for range-ambiguous return signals may be reduced, in some cases, by a large factor. The beam motion can be implemented by real-time adjustment of phase shifters in an electronically-steered phased-array antenna or by electronic switching of feedmore » horns in a reflector antenna system.« less
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  • Abstract not provided.