Patents by Inventor Kenneth Kahle Roberts

Kenneth Kahle Roberts 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).

  • Patent number: 7093188
    Abstract: Units of forward error correction (FEC) encoded bits each represent a one-bit data value and include correctness bits that together reflect a probability that the one-bit data value represented by the unit is correct. The units of FEC encoded bits are decoded by using the correctness bits to perform soft-decision convolution decoding on the units of FEC bits. Subsequences of units that are prone to erroneous soft-decision convolution decoding are detected by determining, whether the distribution of quality bits indicate the units are below a threshold level of correctness, and by comparing characteristics of that distribution to a given set of characteristics predetermined to be prone to result in incorrect decoding. Among the symbols produced for block decoding, symbols that correspond to units that were in detected subsequences are flagged or tagged for erasure during subsequent soft-decision block decoding.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: August 15, 2006
    Assignee: Alion Science and Technology Corp.
    Inventors: Michael Anthony Maiuzzo, Kenneth Kahle Roberts
  • Publication number: 20030192001
    Abstract: A method and apparatus for decoding forward error correction (FEC) encoded data. A stream of units of FEC encoded bits are received, where the units are derived from a transmitted signal, where each unit represents a one-bit data value, and where each unit includes correctness bits that together reflect a level of probability that the one-bit data value represented by the unit differs from corresponding bits in the signal before it was transmitted. The stream of units of FEC encoded bits are decoded by using the quality level of bits to perform soft-decision convolution decoding on the stream of units of FEC bits, where the soft-decision convolution decoding produces, for block decoding, a stream of symbols made up of bits.
    Type: Application
    Filed: April 5, 2002
    Publication date: October 9, 2003
    Applicant: IIT Research Institute
    Inventors: Michael Anthony Maiuzzo, Kenneth Kahle Roberts