Co-notch and independent windowing to mitigate interference in SAR-based imagery

Title: Co-notch and independent windowing to mitigate interference in SAR-based imagery

Abstract

Various technologies for mitigating distortion in coherent image products generated from SAR data are described herein. Synthetic aperture radar (SAR) datasets generated based upon SAR returns from first and second passes of a SAR platform over a scene are received. The SAR datasets can be co-notched at matching sample indices to improve coherence of SAR images generated from the datasets. Windowed SAR data is generated by applying independent windows to subsets of each of the datasets to reduce sidelobe levels of their image impulse responses. Coherent image products are generated based upon the windowed SAR data, wherein an image quality of the coherent image products is improved as compared to coherent image products generated based upon the SAR datasets.

Inventors:: Musgrove, Cameron; Riley, Robert E.; West, James C.

Issue Date:: 2020-03-17

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1637834

Patent Number(s):: 10591582

Application Number:: 15/354,033

Assignee:: National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM); West, James C., Stillwater, OK (United States)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING

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G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
G01S13/9023 - {combined with interferometric techniques}
G01S7/023 - {interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques
G01S13/90 - using synthetic aperture techniques {, e.g. synthetic aperture radar [SAR] techniques}

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DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Resource Relation:: Patent File Date: 11/17/2016

Country of Publication:: United States

Language:: English

Citation Formats


                    Musgrove, Cameron, Riley, Robert E., and West, James C. Co-notch and independent windowing to mitigate interference in SAR-based imagery.  United States: N. p., 2020. 
        Web.

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                    Musgrove, Cameron, Riley, Robert E., & West, James C. Co-notch and independent windowing to mitigate interference in SAR-based imagery.  United States.

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                    Musgrove, Cameron, Riley, Robert E., and West, James C. Tue .  
        "Co-notch and independent windowing to mitigate interference in SAR-based imagery".  United States.  https://www.osti.gov/servlets/purl/1637834.

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@article{osti_1637834,

  title        = {Co-notch and independent windowing to mitigate interference in SAR-based imagery},

  author       = {Musgrove, Cameron and Riley, Robert E. and West, James C.},

  abstractNote = {Various technologies for mitigating distortion in coherent image products generated from SAR data are described herein. Synthetic aperture radar (SAR) datasets generated based upon SAR returns from first and second passes of a SAR platform over a scene are received. The SAR datasets can be co-notched at matching sample indices to improve coherence of SAR images generated from the datasets. Windowed SAR data is generated by applying independent windows to subsets of each of the datasets to reduce sidelobe levels of their image impulse responses. Coherent image products are generated based upon the windowed SAR data, wherein an image quality of the coherent image products is improved as compared to coherent image products generated based upon the SAR datasets.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2020},

  month        = {3}

}

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Title: Co-notch and independent windowing to mitigate interference in SAR-based imagery

Abstract

Citation Formats

Method and system for recovery of missing spectral information in wideband signal patent, September 2014

Phase difference auto focusing for synthetic aperture radar imaging patent, March 1991

SAR radar system patent, October 1999

Process for the detection and suppression of interfering signals in S.A.R. data and device for performing this process patent, February 2000

Radar echo processing with partitioned de-ramp patent, March 2013

Phase correction system for automatic focusing of synthetic aperture radar patent, May 1990

High duty cycle radar with near/far pulse compression interference mitigation patent, September 2012

Synthetic aperture radar simulation patent, October 1997

Method and apparatus for performing local to global multiframe alignment to construct mosaic images patent, June 2000

Fourier-transform-based adaptive radio interference mitigation patent, December 2000

Synthetic aperture radar (SAR) imaging system patent, October 2010

Registering coherent change detection products associated with large image sets and long capture intervals patent, April 2014

Flight path-driven mitigation of wavefront curvature effects in SAR images patent, June 2009

RFI suppression in SAR patent, June 2009

Correction of spatially variant phase error for synthetic aperture radar patent, August 2015

Method and system for recovery of missing spectral information in wideband signal
patent, September 2014

Phase difference auto focusing for synthetic aperture radar imaging
patent, March 1991

SAR radar system
patent, October 1999

Process for the detection and suppression of interfering signals in S.A.R. data and device for performing this process
patent, February 2000

Radar echo processing with partitioned de-ramp
patent, March 2013

Phase correction system for automatic focusing of synthetic aperture radar
patent, May 1990

High duty cycle radar with near/far pulse compression interference mitigation
patent, September 2012

Synthetic aperture radar simulation
patent, October 1997

Method and apparatus for performing local to global multiframe alignment to construct mosaic images
patent, June 2000

Fourier-transform-based adaptive radio interference mitigation
patent, December 2000

Synthetic aperture radar (SAR) imaging system
patent, October 2010

Registering coherent change detection products associated with large image sets and long capture intervals
patent, April 2014

Flight path-driven mitigation of wavefront curvature effects in SAR images
patent, June 2009

RFI suppression in SAR
patent, June 2009

Correction of spatially variant phase error for synthetic aperture radar
patent, August 2015