Patents by Inventor Jim Startup

Jim Startup 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).

  • Subscriber unit for beam acquisition in a satellite communication system and method therefor
    Patent number: 6272314
    Abstract: In a communications system, an earth-based subscriber unit (40, FIG. 1) receives at least one communications beam (50, 60, FIG. 1) transmitted from one or more moving satellite communications nodes (10, 20). The earthbased subscriber unit evaluates which communications beam should be selected based on the power received (FIG. 2, 210), Doppler frequency shift (270), link quality, (290), interference level (300), and satellite and network specific parameters (310). By considering these factors, the earth-based subscriber unit selects the communications beam (50, 60) that will provide the optimum service and reduce the likelihood that an inter-satellite hand over of the call will be required while the call is in progress.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: August 7, 2001
    Assignee: Motorola, Inc.
    Inventors: Thomas Peter Emmons, Jr., Shawn Hogberg, Gerald Joseph Davieau, Jim Startup, Susan Chen