Patents by Inventor William J. Nunan

William J. Nunan 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 of efficient spectrum utilization by communications satellites
    Patent number: 7376417
    Abstract: A satellite system includes a plurality of orbit slots having a first orbital and a second orbital slot. A first satellite occupies a first orbital slot and generates a first set of uniform beams. A second satellite located in a second orbital slot generates a second set of uniform beams. A tiling pattern on the face of the Earth has a plurality of cells, with each of the cells having a defined frequency for communication. The first set of beams and the second set of beams are generated according to parameters to avoid interference between them. The parameters may include satellite orbit separations, beam size, multiplicity of band reuse, and ground station received beamwidth.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: May 20, 2008
    Assignee: The DIRECTV Group, Inc.
    Inventors: Thomas M. Walsh, George Hrycenko, William J. Nunan, Adam Stone
  • Method and system of efficient spectrum utilization by communications satellites
    Patent number: 6810249
    Abstract: A satellite system includes a plurality of orbit slots having a first orbital and a second orbital slot. A first satellite occupies a first orbital slot and generates a first set of uniform beams. A second satellite located in a second orbital slot generates a second set of uniform beams. A tiling pattern on the face of the Earth has a plurality of cells, with each of the cells having a defined frequency for communication. The first set of beams and the second set of beams are generated according to parameters to avoid interference between them. The parameters may include satellite orbit separations, beam size, multiplicity of band reuse, and ground station received beamwidth.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: October 26, 2004
    Assignee: The DirecTV Group, Inc.
    Inventors: Thomas M. Walsh, George Hrycenko, William J. Nunan, Adam Stone
  • Method and system of efficient spectrum utilization by communications satellites
    Publication number: 20040147222
    Abstract: A satellite system includes a plurality of orbit slots having a first orbital and a second orbital slot. A first satellite occupies a first orbital slot and generates a first set of uniform beams. A second satellite located in a second orbital slot generates a second set of uniform beams. A tiling pattern on the face of the Earth has a plurality of cells, with each of the cells having a defined frequency for communication. The first set of beams and the second set of beams are generated according to parameters to avoid interference between them. The parameters may include satellite orbit separations, beam size, multiplicity of band reuse, and ground station received beamwidth.
    Type: Application
    Filed: January 16, 2004
    Publication date: July 29, 2004
    Applicant: Hughes Electronics Corporation
    Inventors: Thomas M. Walsh, George Hrycenko, William J. Nunan, Adam Stone
  • Method and system for determining a position of a transceiver in a communications network
    Patent number: 6313790
    Abstract: A method and system for determining a position of an orbiting transceiver in a communications network includes at least a first and second transceiver at a first and second known location, respectively, on Earth. The first and second transceivers are adapted to transmit and receive communications signals to and from the orbiting transceiver. A processor coupled to one of the first and second transceivers determines a first and second range measurement between each of the first and second transceivers and the orbiting transceiver, respectively, as well as corresponding first and second range rates representative of a time rate of change of the first and second range measurements.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: November 6, 2001
    Assignee: Hughes Electronics Corporation
    Inventors: Donald C. D. Chang, Kar W. Yung, William J. Nunan, David C. Cheng, Bruce E. Shuman
  • Method and system for determining a position of a transceiver in a communications network
    Publication number: 20010009405
    Abstract: A method and system for determining a position of an orbiting transceiver in a communications network includes at least a first and second transceiver at a first and second known location, respectively, on Earth. The first and second transceivers are adapted to transmit and receive communications signals to and from the orbiting transceiver. A processor coupled to one of the first and second transceivers determines a first and second range measurement between each of the first and second transceivers and the orbiting transceiver, respectively, as well as corresponding first and second range rates representative of a time rate of change of the first and second range measurements.
    Type: Application
    Filed: February 9, 2001
    Publication date: July 26, 2001
    Applicant: Hughes Electronics Corporation
    Inventors: Donald C.D. Chang, Kar W. Yung, William J. Nunan, David C. Cheng, Bruce E. Shuman
  • Method and system for determining a position of a communication satellite utilizing two-way ranging
    Patent number: 6229477
    Abstract: A method and system for determining a position of an orbiting transceiver in a communications network includes at least a first and second transceiver at a first and second known location, respectively, on Earth. The first and second transceivers are adapted to transmit and receive communications signals to and from the orbiting transceiver. A processor coupled to one of the first and second transceivers determines a first and second range measurement between each of the first and second transceivers and the orbiting transceiver, respectively, as well as corresponding first and second range rates representative of a time rate of change of the first and second range measurements.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: May 8, 2001
    Assignee: Hughes Electronics Corporation
    Inventors: Donald C. D. Chang, Kar W. Yung, William J. Nunan, David C. Cheng, Bruce E. Shuman