Patents by Inventor Dan M. Griffen

Dan M. Griffen 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).

  • Methods and apparatus implementing short and long code channel overlay for fast acquistion of long PN codes in spread spectrum communications systems
    Patent number: 7701996
    Abstract: The present invention concerns methods and apparatus for use in a spread spectrum communications system. In particular, in a method of the present invention information useful for acquiring a target signal is selected; the information is incorporated in an acquisition signal; the acquisition signal is transmitted; the target signal is spread with a spreading code; and the target signal is transmitted. At a receiving node, the acquisition information useful for acquiring the target signal is recovered from the acquisition signal and used to acquire the target signal. Apparatus in accordance with the present invention implement methods of the present invention. The methods and apparatus of the present invention can be used in node- and network-discovery situations.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: April 20, 2010
    Assignee: L-3 Communications Corporation
    Inventors: Thomas R. Giallorenzi, Johnny M. Harris, Dan M. Griffen, Richard B. Ertel, Eric K. Hall