Patents by Inventor Alan R. Lindsey

Alan R. Lindsey 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
    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
  • Apparatus and method of CTCM encoding and decoding for a digital communication system
    Publication number: 20020196862
    Abstract: A method of building systematically a multi-dimensional (n, D, L) circular trellis coded modulation (CTCM) encoder with properties of optimal energy efficiency, strong tail biting and maximum minimum distance (dmin) of trellis paths is disclosed.
    Type: Application
    Filed: April 16, 2001
    Publication date: December 26, 2002
    Inventors: Jeffrey C. Dill, Sergio R. Lopez-Permouth, Alan R. Lindsey, Yung-Cheng Lo., Frank A. Alder, Xiangyu Song