Patents by Inventor Timothy P. Cox

Timothy P. Cox 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).

  • Class of low cross correlation non-palindromic synchronization sequences for code tracking in synchronous multiple access communication systems
    Patent number: 5953327
    Abstract: A method and apparatus are provided which enables all return links from the remote stations in a star configured CDMA system to be maintained in time synchronization. This method employs special synchronization codes in conjunction with a standard CDMA chip time tracking apparatus, such as a Delay Lock Loop. Each of these special synchronization codes possesses an extremely low cross-correlation property with each of the other codes in the set of synchronization codes. The low cross-correlation property exists for time offsets up to plus and minus one CDMA chip period which permits the use of a standard chip timing discriminator apparatus, such as an early-late gate, within the Delay Lock Loop. Given the extremely low cross-correlation of these special synchronization codes, a significant improvement is achieved in time tracking performance and/or return link signal efficiency over prior art.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: September 14, 1999
    Assignee: Stanford Telecommunications, Inc.
    Inventor: Timothy P. Cox