Patents by Inventor Lars Kristen Selberg Daldorff

Lars Kristen Selberg Daldorff 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).

  • Determining a direction of arrival of signals incident to a tripole sensor
    Patent number: 7973715
    Abstract: A system to determine a direction of arrival of each of a plurality of constituent signals of a superimposed wave includes a tripole radio antenna, a sampling unit, a frequency determining unit, an amplitude and phase determining unit, and a direction determining unit. The sampling unit is configured to periodically sample an output of the tripole radio antenna to generate at least two samples. The frequency determining unit is configured to determine frequencies for each dimension of the constituent signals by performing a unitary matrix pencil method on the at least two samples. The amplitude and phase determining unit is configured to determine x, y, z amplitudes and x, y, z phases for each constituent signal using the determined frequencies. The direction determining unit is configured to determine a direction of arrival for each of the constituent signals from the determined frequencies, amplitudes, and phases.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: July 5, 2011
    Assignee: International Business Machines Corporation
    Inventors: Alain Biem, Lars Kristen Selberg Daldorff, Deepak Srinivas Turaga, Olivier Verscheure
  • DETERMINING A DIRECTION OF ARRIVAL OF SIGNALS INCIDENT TO A TRIPOLE SENSOR
    Publication number: 20100265138
    Abstract: A system to determine a direction of arrival of each of a plurality of constituent signals of a superimposed wave includes a tripole radio antenna, a sampling unit, a frequency determining unit, an amplitude and phase determining unit, and a direction determining unit. The sampling unit is configured to periodically sample an output of the tripole radio antenna to generate at least two samples. The frequency determining unit is configured to determine frequencies for each dimension of the constituent signals by performing a unitary matrix pencil method on the at least two samples. The amplitude and phase determining unit is configured to determine x, y, z amplitudes and x, y, z phases for each constituent signal using the determined frequencies. The direction determining unit is configured to determine a direction of arrival for each of the constituent signals from the determined frequencies, amplitudes, and phases.
    Type: Application
    Filed: April 17, 2009
    Publication date: October 21, 2010
    Inventors: ALAIN BIEM, LARS KRISTEN SELBERG DALDORFF, DEEPAK SRINIVAS TURAGA, OLIVIER VERSCHEURE