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

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

Works referenced in this record:

Two-Antenna SAR With Waveform Diversity for Ground Moving Target Indication
journal, December 2014
  • Wang, Wen-Qin; Shao, Huaizong
  • IEEE Geoscience and Remote Sensing Letters, Vol. 11, Issue 12, p. 2154-2158
  • DOI: 10.1109/LGRS.2014.2322825

Preliminary design of a SAR-GMTI processing system for RADARSAT-2 MODEX data
conference, January 2003

Comparison of features from SAR and GMTI imagery of ground targets
conference, September 2003