Patents by Inventor Dennis Ray Schaefer

Dennis Ray Schaefer 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).

  • Method and apparatus for pseudo-random noise offset reuse in a multi-sector CDMA system
    Patent number: 6909707
    Abstract: A method and apparatus for reuse of pseudo-random noise (PN) offsets within a cell of a wireless communication system such as a multi-sector CDMA system. Adaptive antenna arrays are employed to form the multiple sector areas within the CDMA cell. A forward link data channel is established between a mobile unit and a base station via sectors that share or reuse comment PN offsets, thereby providing desirable transmit diversity.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: June 21, 2005
    Assignee: Motorola, Inc.
    Inventors: Ron Rotstein, Yuda Yehuda Luz, Robert T. Love, Dennis Ray Schaefer, Jiangnan (Jason) Chen, Colin Frank