Patents by Inventor David A. Hosang

David A. Hosang 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).

  • Geolocation of cellular phone using supervisory audio tone transmitted from single base station
    Patent number: 6754502
    Abstract: In order to geolocate a wireless communication device (cellular phone) initiating a 911 call, a base station transceiver transmits a supervisory audio tone (SAT), which is automatically looped back by the calling cellular phone. Returned SAT signals are correlated with those transmitted to determine the range of the cellular phone. In addition, incoming signals from the cellular phone, such as the returned SAT signals, are received by a phased array antenna and subjected to angle of arrival processing to determine the direction of the cellular phone relative to the base station. Given this angle of arrival and range information the cellular phone is geolocated.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: June 22, 2004
    Assignee: Harris Corporation
    Inventors: Robert C. Hildebrand, Julian Bartow Willingham, Robert W. Boyd, David A. Hosang
  • Geolocation of cellular phone using supervisory audio tone transmitted from single base station
    Publication number: 20010029185
    Abstract: In order to geolocate a wireless communication device (cellular phone) initiating a 911 call, a base station transceiver transmits a supervisory audio tone (SAT), which is automatically looped back by the calling cellular phone. Returned SAT signals are correlated with those transmitted to determine the range of the cellular phone. In addition, incoming signals from the cellular phone, such as the returned SAT signals, are received by a phased array antenna and subjected to angle of arrival processing to determine the direction of the cellular phone relative to the base station. Given this angle of arrival and range information the cellular phone is geolocated.
    Type: Application
    Filed: June 18, 2001
    Publication date: October 11, 2001
    Applicant: Harris Corporation
    Inventors: Robert C. Hildebrand, Julian Bartow Willingham, Robert W. Boyd, David A. Hosang
  • Geolocation of cellular phone using supervisory audio tone transmitted from single base station
    Patent number: 6292665
    Abstract: In order to geolocate a wireless communication device (cellular phone) initiating a 911 call, a base station transceiver transmits a supervisory audio tone (SAT), which is automatically looped back by the calling cellular phone. Returned SAT signals are correlated with those transmitted to determine the range of the cellular phone. In addition, incoming signals from the cellular phone, such as the returned SAT signals, are received by a phased array antenna and subjected to angle of arrival processing to determine the direction of the cellular phone relative to the base station. Given this angle of arrival and range information the cellular phone is geolocated.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: September 18, 2001
    Assignee: Harris Corporation
    Inventors: Robert C. Hildebrand, Julian Bartow Willingham, Robert W. Boyd, David A. Hosang