Patents by Inventor Kazuhisa Obuchii

Kazuhisa Obuchii 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).

  • Turbo decoding method and turbo decoding apparatus
    Patent number: 7530011
    Abstract: Disclosed are a turbo decoding apparatus and method for decoding a turbo-encoded signal by repeating element decoding. The apparatus includes a plurality of element decoders for applying element decoding, e.g., MAP decoding, in parallel to respective ones of a plurality of divided signals to be decoded, and an interleaver/deinterleaver for interleaving or deinterleaving a plurality of results of element decoding collectively. Each element decoder applies element decoding to a respective one of the divided signals, and the interleaver/deinterleaver alternately interleaves and deinterleaves a plurality of results of element decoding collectively. Turbo decoding is carried out by repeating these operations a prescribed number of times.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: May 5, 2009
    Assignee: Fujitsu Limited
    Inventors: Kazuhisa Obuchii, Tetsuya Yano
  • Turbo decoding method and turbo decoding apparatus
    Publication number: 20040025103
    Abstract: Disclosed are a turbo decoding apparatus and method for decoding a turbo-encoded signal by repeating element decoding. The apparatus includes a plurality of element decoders for applying element decoding, e.g., MAP decoding, in parallel to respective ones of a plurality of divided signals to be decoded, and an interleaver/deinterleaver for interleaving or deinterleaving a plurality of results of element decoding collectively. Each element decoder applies element decoding to a respective one of the divided signals, and the interleaver/deinterleaver alternately interleaves and deinterleaves a plurality of results of element decoding collectively. Turbo decoding is carried out by repeating these operations a prescribed number of times.
    Type: Application
    Filed: May 22, 2003
    Publication date: February 5, 2004
    Inventors: Kazuhisa Obuchii, Tetsuya Yano