Patents by Inventor Bill Ames

Bill Ames 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).

  • Accurate range and range rate determination in a satellite communications system
    Patent number: 6137441
    Abstract: The present invention is a system and method for accurately determining the distance (range) between one or more satellites and a user terminal and the rate of change (range rate) of that distance. When accurately determined according to the present invention, these quantities can be used to determine the location of the user terminal with a high degree of accuracy. When one satellite is available, the present invention determines the range and range rate based on the Doppler frequency shift that a signal experiences between the satellite and the user terminal, the round trip delay a signal experiences during transmission from the satellite to the user terminal and back via a satellite to a gateway, the Doppler frequency shift a signal experiences between the satellite and the gateway, and the timestamps of the measurements.
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: October 24, 2000
    Assignee: Qualcomm Incorporated
    Inventors: Jin Dai, Nadav Levanon, Bill Ames, Ed Victor, Jim Determan