Patents by Inventor Calvin D. Le

Calvin D. Le 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).

  • Interferometric synthetic aperture radar imaging of subsurface structures
    Patent number: 11002848
    Abstract: A subsurface interferometric synthetic aperture radar (InSAR) imaging technique for the detection and localization of underground targets in the presence of a rough ground surface comprises a two-step procedure. First, surface clutter suppression is performed with a polarimetric difference operation that does not alter the propagation phase of the target scattered signal; then a subsurface interferometric algorithm is applied to infer target depth by correlating the clutter-suppressed images obtained along two observation paths.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: May 11, 2021
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: DaHan Liao, Calvin D. Le, Traian V. Dogaru
  • INTERFEROMETRIC SYNTHETIC APERTURE RADAR IMAGING OF SUBSURFACE STRUCTURES
    Publication number: 20200363525
    Abstract: A subsurface interferometric synthetic aperture radar (InSAR) imaging technique for the detection and localization of underground targets in the presence of a rough ground surface comprises a two-step procedure. First, surface clutter suppression is performed with a polarimetric difference operation that does not alter the propagation phase of the target scattered signal; then a subsurface interferometric algorithm is applied to infer target depth by correlating the clutter-suppressed images obtained along two observation paths.
    Type: Application
    Filed: May 15, 2019
    Publication date: November 19, 2020
    Inventors: DaHan Liao, Calvin D. Le, Traian V. Dogaru