Patents by Inventor David Gianella

David Gianella 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).

  • Trellis coded QAM using rate compatible, punctured, convolutional codes
    Patent number: 6052821
    Abstract: A digital transmission system provides selective protection by combining a convolutional coding, a punctured coding and a digital quadrature amplitude modulation. The rate of the convolutional coding in N/2N and the modulation uses a 2.sup.2N -point constellation, with N>1.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: April 18, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Antoine Chouly, Americo Brajal, David Gianella
  • Digital transmission system and method comprising a punctured product code combined with a quadrature amplitude modulation
    Patent number: 5944850
    Abstract: A digital transmission system which provides transmission error protection for transmitted data. The input data is encoded using a punctured systematic convolutional trellis code. Row and column components of a matrix formed by the encoded input data are then used to generate a product code in blocks, with trellis closure by addition of redundant data. The data thus encoded is then allocated to quadrature amplitude modulation symbols. At the receiver end the transmitted modulation symbols are decoded by iterative decoding, the reliability of hard decisions being computed so as to provide generation of soft decision output symbols.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: August 31, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Antoine Chouly, Americo Brajal, David Gianella