Patents by Inventor Paula F. Such

Paula F. Such 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: 6477679
    Abstract: In a decoding system having a first constituent decoder and a second constituent decoder, a sequence of inputs that includes a system input, a first parity input, and a second parity input, is decoded. The first constituent decoder receives a feedback input and the first parity input, and based on these inputs, the first constituent decoder produces a first constituent decoder output. The output of the first constituent decoder is modified to obtain a first combined feedback and system input, thereby including a statistical dependency. The second constituent decoder receives this combined input and the second parity input and based on these inputs, produces a second constituent decoder output. The second constituent decoder output is processed to produce decoded bits. Embodiments further include modifying the output of the second constituent decoder and providing the modified output as the feedback to the first constituent decoder.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: November 5, 2002
    Assignee: Motorola, Inc.
    Inventors: Paula F. Such, Dana J. Taipale
  • Patent number: 6477681
    Abstract: The present invention includes methods relating generally to communication systems. In decoding a sequence of symbols output by an encoder having a first constituent encoder and a second constituent encoder, where the output of these encoders correspond to unterminated trellises, a forward calculation is performed along each trellis to compute a forward state metric value for a first node of each trellis. Prior to performing a backward calculation along each trellis, a backward state metric value of a second node of each trellis is initialized to the forward state metric values of the corresponding first nodes of each trellis. Using these forward and backward state metric values, the sequence of symbols is decoded. Other embodiments include decoding terminated trellises in a similar manner, or dividing each trellis into smaller windows and processing the series of windows.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: November 5, 2002
    Assignee: Motorola, Inc.
    Inventors: Dana J. Taipale, Paula F. Such