Patents by Inventor Daisuke Anzai

Daisuke Anzai 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 wireless terminal from a received signal strength
    Patent number: 7579990
    Abstract: A first estimated location of a target terminal to be estimated in its location is obtained based on information derived from radio signals for location estimation and also locations of anchor terminals. Then, on the basis of the first estimated location thus obtained, estimated distances are calculated while expected values are calculated based on information required for location estimation to compare the estimated distances with the expected-values. Depending on the comparison result, one or more anchor terminals are selected as nonuse terminals. On the basis of information required for location estimation derived from radio signals sent by the anchor terminals other than the selected nonuse terminals and also on the locations of the anchor terminals except the nonuse terminals, a second estimated location of the target terminal is obtained.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: August 25, 2009
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Kentarou Yanagihara, Daisuke Anzai
  • Method and system for estimating the location of a wireless terminal from a received signal strength
    Publication number: 20080204321
    Abstract: A first estimated location of a target terminal to be estimated in its location is obtained based on information derived from radio signals for location estimation and also locations of anchor terminals. Then, on the basis of the first estimated location thus obtained, estimated distances are calculated while expected values are calculated based on information required for location estimation to compare the estimated distances with the expected-values. Depending on the comparison result, one or more anchor terminals are selected as nonuse terminals. On the basis of information required for location estimation derived from radio signals sent by the anchor terminals other than the selected nonuse terminals and also on the locations of the anchor terminals except the nonuse terminals, a second estimated location of the target terminal is obtained.
    Type: Application
    Filed: February 21, 2008
    Publication date: August 28, 2008
    Applicant: OKI ELECTRIC INDUSTRY CO., LTD
    Inventors: Kentarou Yanagihara, Daisuke Anzai