Patents by Inventor Erik H. Kjeldsen

Erik H. Kjeldsen 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 AND METHOD FOR ORTHOGONALLY MULTIPLEXED SIGNAL TRANSMISSION AND RECEPTION ON A NON-CONTIGUOUS SPECTRAL BASIS
    Publication number: 20090316568
    Abstract: A wireless communication system implements Forward Error Correction (“FEC”) and Interpolated Tree Orthogonal Multiplexing (“ITOM”). ITOM is a compact spectral waveform variant that uses a dyadic tree structure. The tree structure facilitates a flexible mapping of the transmit waveform to the available spectrum bandwidth on a non-contiguous and multiresolution basis. The system includes a receiver that implements a maximum likelihood (“ML”) synchronization scheme, which is pulse shape independent and non-data aided.
    Type: Application
    Filed: November 10, 2006
    Publication date: December 24, 2009
    Inventors: Fredric J. Harris, Erik H. Kjeldsen
  • System and method for orthogonally multiplexed signal transmission and reception on a non-contiguous spectral basis
    Patent number: 7627056
    Abstract: A wireless communication system implements Forward Error Correction (“FEC”) and Interpolated Tree Orthogonal Multiplexing (“ITOM”). ITOM is a compact spectral waveform variant that uses a dyadic tree structure. The tree structure facilitates a flexible mapping of the transmit waveform to the available spectrum bandwidth on a non-contiguous and multiresolution basis. The system includes a receiver that implements a maximum likelihood (“ML”) synchronization scheme, which is pulse shape independent and non-data aided.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: December 1, 2009
    Assignee: Scientific Research Corporation
    Inventors: Fredric J. Harris, Erik H. Kjeldsen
  • System and method for orthogonally multiplexed signal transmission and reception
    Patent number: 7206359
    Abstract: A wireless communication network that implements Circular Simplex Turbo Block Coded Modulation (“CSTBCM”) Forward Error Correction (“FEC”), randomization and Wavelet Packet Modulation (“WPM”) is provided. The network includes a transmitter that uses an adaptive tree structure. The tree structure is pruned to avoid known signal impediments by first determining the best uniform level and then tuning in the forward direction and in the reverse direction. The network also includes a receiver that implements a maximum likelihood decision directed (“MLDD”) synchronization scheme. The synchronization scheme is pulse shape independent and non-data aided.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: April 17, 2007
    Assignees: Scientific Research Corporation
    Inventors: Erik H. Kjeldsen, Alan R. Lindsey
  • System and method for orthogonally multiplexed signal transmission and reception
    Publication number: 20030231714
    Abstract: A wireless communication network that implements Circular Simplex Turbo Block Coded Modulation (“CSTBCM”) Forward Error Correction (“FEC”), randomization and Wavelet Packet Modulation (“WPM”) is provided. The network includes a transmitter that uses an adaptive tree structure. The tree structure is pruned to avoid known signal impediments by first determining the best uniform level and then tuning in the forward direction and in the reverse direction. The network also includes a receiver that implements a maximum likelihood decision directed (“MLDD”) synchronization scheme. The synchronization scheme is pulse shape independent and non-data aided.
    Type: Application
    Filed: March 27, 2003
    Publication date: December 18, 2003
    Inventors: Erik H. Kjeldsen, Alan R. Lindsey