Patents by Inventor Charles V. Jakowatz, Jr.

Charles V. Jakowatz, Jr. 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).

  • Phase correction system for automatic focusing of synthetic aperture radar
    Patent number: 4924229
    Abstract: A phase gradient autofocus system for use in synthetic aperture imaging accurately compensates for arbitrary phase errors in each imaged frame by locating highlighted areas and determining the phase disturbance or image spread associated with each of these highlight areas. An estimate of the image spread for each highlighted area in a line in the case of one dimensional processing or in a sector, in the case of two-dimensional processing, is determined. The phase error is determined using phase gradient processing. The phase error is then removed from the uncorrected image and the process is iteratively performed to substantially eliminate phase errors which can degrade the image.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: May 8, 1990
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Paul H. Eichel, Dennis C. Ghiglia, Charles V. Jakowatz, Jr.