Patents by Inventor Aaron T. Hallquist

Aaron T. Hallquist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Object detection with a multistatic array using singular value decomposition
    Patent number: 8766845
    Abstract: A method and system for detecting the presence of subsurface objects within a medium is provided. In some embodiments, the detection system operates in a multistatic mode to collect radar return signals generated by an array of transceiver antenna pairs that is positioned across a surface and that travels down the surface. The detection system converts the return signals from a time domain to a frequency domain, resulting in frequency return signals. The detection system then performs a singular value decomposition for each frequency to identify singular values for each frequency. The detection system then detects the presence of a subsurface object based on a comparison of the identified singular values to expected singular values when no subsurface object is present.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: July 1, 2014
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Aaron T. Hallquist, David H. Chambers
  • OBJECT DETECTION WITH A MULTISTATIC ARRAY USING SINGULAR VALUE DECOMPOSITION
    Publication number: 20130120181
    Abstract: A method and system for detecting the presence of subsurface objects within a medium is provided. In some embodiments, the detection system operates in a multistatic mode to collect radar return signals generated by an array of transceiver antenna pairs that is positioned across a surface and that travels down the surface. The detection system converts the return signals from a time domain to a frequency domain, resulting in frequency return signals. The detection system then performs a singular value decomposition for each frequency to identify singular values for each frequency. The detection system then detects the presence of a subsurface object based on a comparison of the identified singular values to expected singular values when no subsurface object is present.
    Type: Application
    Filed: December 7, 2011
    Publication date: May 16, 2013
    Applicant: Lawrence Livermore National Security, LLC
    Inventors: Aaron T. Hallquist, David H. Chambers