Patents by Inventor Masaru Moriwake

Masaru Moriwake 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).

  • Path trace viterbi decoder
    Patent number: 4777636
    Abstract: A path trace Viterbi decoder comprising an ACS circuit for generating a path selecting signal, a path memory for storing the path selecting signal, a node calculator for calculating the node number of a most likely path on the basis of the data read out from the path memory, and a trace memory for storing the most likely path data, etc. The node number data of the most likely path calculated by the node calculator is stored in the trace memory and the decoding operation is carried out by using the data read from the trace memory.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: October 11, 1988
    Assignee: Fujitsu Limited
    Inventors: Atsushi Yamashita, Tadayoshi Katoh, Masaru Moriwake, Tadashi Nakamura