Patents by Inventor Elisha J. Ulmer

Elisha J. Ulmer 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).

  • Efficient trellis state metric normalization
    Patent number: 6189126
    Abstract: A method and apparatus for normalizing a plurality of state-metric registers in a decoder using a trellis. The method includes determining an approximate minimum of respective state-metric values stored in the plurality of state-metric registers, and subtracting the approximate minimum from the values. Determining the approximate minimum preferably includes determining the minimum of a predetermined number of most significant bits in the plurality of state-metric registers.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: February 13, 2001
    Assignee: Qualcomm Incorporated
    Inventors: Elisha J. Ulmer, Jeremy M. Stein