Patents by Inventor Tomofumi Yabu

Tomofumi Yabu 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 system for estimating the location of a mobile terminal
    Patent number: 9316721
    Abstract: A method and system are provided for estimating the location of a mobile radio-communication terminal, the mobile terminal having a plurality of antennas, and being in communication range of at least one transmitter having a plurality of antennas, the method comprising; measuring the time of arrival of a signal transmitted from the M antennas of the at least one transmitter at each of the N antennas of the mobile terminal to determine M×N range measurements corresponding to the M×N transmission paths of said signal between the M antennas of the transmitter and the N antennas of the mobile terminal; and estimating the location of the mobile terminal based on the M×N range measurements. The location of the mobile terminal may be estimated by applying a least squares method.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: April 19, 2016
    Assignee: Orange
    Inventors: Wladimir Bocquet, Shinya Tsutsumi, Tomofumi Yabu
  • METHOD AND SYSTEM FOR ESTIMATING THE LOCATION OF A MOBILE TERMINAL
    Publication number: 20110177828
    Abstract: A method and system are provided for estimating the location of a mobile radio-communication terminal, the mobile terminal having a plurality of antennas, and being in communication range of at least one transmitter having a plurality of antennas, the method comprising; measuring the time of arrival of a signal transmitted from the M antennas of the at least one transmitter at each of the N antennas of the mobile terminal to determine M×N range measurements corresponding to the M×N transmission paths of said signal between the M antennas of the transmitter and the N antennas of the mobile terminal; and estimating the location of the mobile terminal based on the M×N range measurements. The location of the mobile terminal may be estimated by applying a least squares method.
    Type: Application
    Filed: September 24, 2009
    Publication date: July 21, 2011
    Applicant: France Telecom
    Inventors: Wladimir Bocquet, Shinya Tsutsumi, Tomofumi Yabu