Patents by Inventor Lawrence Leftin

Lawrence Leftin 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 systems for implementing an iterated extended Kalman filter within a navigation system
    Publication number: 20070213933
    Abstract: A navigation system for a vehicle is described that includes an inertial measurement unit, a positioning unit, and a processing unit. The inertial measurement unit configured to provide a first set of data relating to operation of the vehicle and the positioning unit is configured to provide a second set of data relating to operation of the vehicle. The processing unit is configured to receive the data sets provided by the inertial measurement unit and the positioning unit and the processing unit comprises an error processing device. The error processing device is programmed with time updating error states and measurement updating error states relating to the data sets received by said processing unit and is configured to iterate both the time updating error states and the measurement updating error states based on a first criteria and iterate only the measurement updating error states based on a second criteria.
    Type: Application
    Filed: March 8, 2006
    Publication date: September 13, 2007
    Inventors: Yueping Zeng, Jeffrey Kirkland, John Anderson, Lawrence Leftin, Richard Briske