Patents by Inventor Prabha Janardan

Prabha Janardan 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).

  • System for wireless location estimation using radio transceivers with polarization diversity
    Patent number: 8447330
    Abstract: A system and method for wireless location estimation of a mobile node using radio transceivers with polarization diversity have been disclosed. The system includes a plurality of pre-defined fixed reference nodes distributed over a predetermined area adapted to transmit fixed reference signals. The system further includes mobile node transmission module at the mobile node adapted to transmit mobile reference signals with respect the mobile node and plurality of pre-defined fixed reference nodes. The horizontal polarization module and vertical polarization module polarize the transmitted mobile reference signals and the strength of the signals is measured. The derivation module derives the range of the signals. Subsequently, a profile of the derived range with reference to the measured signal strength is created by the system. The system further employs a trilateration algorithm to determine localization of the node using the created profile, thereby providing the location estimation for the mobile node.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: May 21, 2013
    Assignee: Tata Consultancy Services Ltd.
    Inventors: Tapas Chakravarty, Chethan Puttanna Konanakera, Prabha Janardan, Mariswamy Girish Chandra, Balamuralidhar Purushothaman
  • System for Wireless Location Estimation Using Radio Transceivers with Polarization Diversity
    Publication number: 20130023283
    Abstract: A system and method for wireless location estimation of a mobile node using radio transceivers with polarization diversity have been disclosed. The system includes a plurality of pre-defined fixed reference nodes distributed over a predetermined area adapted to transmit fixed reference signals. The system further includes mobile node transmission module at the mobile node adapted to transmit mobile reference signals with respect the mobile node and plurality of pre-defined fixed reference nodes. The horizontal polarization module and vertical polarization module polarize the transmitted mobile reference signals and the strength of the signals is measured. The derivation module derives the range of the signals. Subsequently, a profile of the derived range with reference to the measured signal strength is created by the system. The system further employs a trilateration algorithm to determine localization of the node using the created profile, thereby providing the location estimation for the mobile node.
    Type: Application
    Filed: April 25, 2012
    Publication date: January 24, 2013
    Inventors: Tapas Chakravarty, Chethan Puttanna Konanakera, Prabha Janardan, Mariswamy Girish Chandra, Balamuralidhar Purushothaman