Subaperture clutter filter with CFAR signal detection

Ormesher, Richard C.; Naething, Richard M.

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Title: Subaperture clutter filter with CFAR signal detection

Abstract

The various technologies presented herein relate to the determination of whether a received signal comprising radar clutter further comprises a communication signal. The communication signal can comprise of a preamble, a data symbol, communication data, etc. A first portion of the radar clutter is analyzed to determine a radar signature of the first portion of the radar clutter. A second portion of the radar clutter can be extracted based on the radar signature of the first portion. Following extraction, any residual signal can be analyzed to retrieve preamble data, etc. The received signal can be based upon a linear frequency modulation (e.g., a chirp modulation) whereby the chirp frequency can be determined and the frequency of transmission of the communication signal can be based accordingly thereon. The duration and/or bandwidth of the communication signal can be a portion of the duration and/or the bandwidth of the radar clutter.

Inventors:: Ormesher, Richard C.; Naething, Richard M.

Issue Date:: 2016-08-30

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1311865

Patent Number(s):: 9429644

Application Number:: 14/052,901

Assignee:: Sandia Corporation (Albuquerque, NM)

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

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G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
G01S13/348 - {using square or rectangular modulation, e.g. diplex radar for ranging over short distances}
G01S13/90 - using synthetic aperture techniques {, e.g. synthetic aperture radar [SAR] techniques}
G01S13/9027 - {Pattern recognition for feature extraction}
G01S7/006 - {using shared front-end circuitry, e.g. antennas
G01S7/354 - {Extracting wanted echo-signals
G01S7/414 - {Discriminating targets with respect to background clutter}

Show less

DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Resource Relation:: Patent File Date: 2013 Oct 14

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; 42 ENGINEERING

Citation Formats


                    Ormesher, Richard C., and Naething, Richard M. Subaperture clutter filter with CFAR signal detection.  United States: N. p., 2016. 
        Web.

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                    Ormesher, Richard C., & Naething, Richard M. Subaperture clutter filter with CFAR signal detection.  United States.

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                    Ormesher, Richard C., and Naething, Richard M. Tue .  
        "Subaperture clutter filter with CFAR signal detection".  United States.  https://www.osti.gov/servlets/purl/1311865.

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@article{osti_1311865,

  title        = {Subaperture clutter filter with CFAR signal detection},

  author       = {Ormesher, Richard C. and Naething, Richard M.},

  abstractNote = {The various technologies presented herein relate to the determination of whether a received signal comprising radar clutter further comprises a communication signal. The communication signal can comprise of a preamble, a data symbol, communication data, etc. A first portion of the radar clutter is analyzed to determine a radar signature of the first portion of the radar clutter. A second portion of the radar clutter can be extracted based on the radar signature of the first portion. Following extraction, any residual signal can be analyzed to retrieve preamble data, etc. The received signal can be based upon a linear frequency modulation (e.g., a chirp modulation) whereby the chirp frequency can be determined and the frequency of transmission of the communication signal can be based accordingly thereon. The duration and/or bandwidth of the communication signal can be a portion of the duration and/or the bandwidth of the radar clutter.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2016},

  month        = {8}

}

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Works referenced in this record:

Radar transponder apparatus and signal processing technique
patent, January 1996

Axline, Robert M.; Sloan, George R.; Spalding, Richard E.
US Patent Document 5,486,830
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5486830

Transponder data processing methods and systems
patent, June 2003

Axline, Robert M.
US Patent Document 6,577,266
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6577266

Removing interfering clutter associated with radar pulses that an airborne radar receives from a radar transponder
patent, December 2008

Ormesher, Richard C.; Axline, Robert M.
US Patent Document 7,460,059
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7460059

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

Morris, James R.
US Patent Document 7,812,758
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7812758

Clutter Reduction for Synthetic Aperture Radar Imagery Based On Adaptive Wavelet Packet Transform - Abstract
journal, January 2000

Deng, H.; Ling, H.
Journal of Electromagnetic Waves and Applications, Vol. 14, Issue 6
https://doi.org/10.1163/156939300X01625

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Similar Records

Title: Subaperture clutter filter with CFAR signal detection

Abstract

Citation Formats

Radar transponder apparatus and signal processing technique patent, January 1996

Transponder data processing methods and systems patent, June 2003

Removing interfering clutter associated with radar pulses that an airborne radar receives from a radar transponder patent, December 2008

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

Clutter Reduction for Synthetic Aperture Radar Imagery Based On Adaptive Wavelet Packet Transform - Abstract journal, January 2000

Radar transponder apparatus and signal processing technique
patent, January 1996

Transponder data processing methods and systems
patent, June 2003

Removing interfering clutter associated with radar pulses that an airborne radar receives from a radar transponder
patent, December 2008

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

Clutter Reduction for Synthetic Aperture Radar Imagery Based On Adaptive Wavelet Packet Transform - Abstract
journal, January 2000