Patents by Inventor Roopa Rao

Roopa Rao 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).

  • Symbol timing recovery method for low resolution multiple amplitude signals
    Patent number: 6731697
    Abstract: Symbol timing is performed by providing a histogram of samples of a signal for a predetermined number of symbol times. An average, weighted average, or other method is applied to determine an average timing for a max eye opening for each symbol time. The average max eye opening timing is applied to an edge detection of a currently received signal to determine timing of a sample that is most likely to occur closest to the max eye opening for the current symbol. The invention may also be practiced based on a center timing of each symbol.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: May 4, 2004
    Assignee: Cadence Desicgn Systems, Inc.
    Inventors: Joseph Boccuzzi, Kevin Hwang, Roopa Rao