Patents by Inventor Harold J. Levin

Harold J. Levin 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).

  • Discrete fourier transform (DFT) leakage removal
    Patent number: 6882947
    Abstract: A technique for measuring spectral components, such as noise and distortion, of a non-coherently sampled test signal containing at least one tone of known frequency includes modeling the spectral components of the at least one tone, including the effects of leakage, based upon frequency of the at least one tone and a plurality of known sampling parameters. A DFT is taken of the sampled test signal, and the DFT is adjusted based on the modeled spectral components. The adjusted DFT is substantially leakage-free and directly reveals spectral components of the test signal, including low-power components that would ordinarily be lost in the leakage errors.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: April 19, 2005
    Assignee: Teradyne, Inc.
    Inventor: Harold J. Levin
  • DFT leakage removal for non-coherently sampled signals
    Publication number: 20040122608
    Abstract: A technique for measuring spectral components, such as noise and distortion, of a non-coherently sampled test signal containing at least one tone of known frequency includes modeling the spectral components of the at least one tone, including the effects of leakage, based upon frequency of the at least one tone and a plurality of known sampling parameters. A DFT is taken of the sampled test signal, and the DFT is adjusted based on the modeled spectral components. The adjusted DFT is substantially leakage-free and directly reveals spectral components of the test signal, including low-power components that would ordinarily be lost in the leakage errors.
    Type: Application
    Filed: December 31, 2001
    Publication date: June 24, 2004
    Inventor: Harold J. Levin