Patents by Inventor Katsuhiko Tanahashi

Katsuhiko Tanahashi 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).

  • TDMA satellite communication system for transmitting serial subsignal data
    Patent number: 5550831
    Abstract: A TDMA satellite communication system transmits serial subsignal data in addition to main signal data and a unique word through each frame of a multiframe transmission line. A transmitting station includes a serial subsignal data generating unit for generating the serial subsignal data by inverting or noninverting, for each frame, the unique word in accordance with original (subsignal) data synchronous with the unique word, and a multiplexing unit for multiplexing the serial subsignal data and the main signal data to transmit to the receiving station. A receiving station includes a demultiplexing unit for separating the main signal data and the preamble, and a unique word detecting unit for detecting the serial subsignal data by comparing the preamble demultiplexed by the demultiplexing unit with a comparison unique word.
    Type: Grant
    Filed: March 8, 1994
    Date of Patent: August 27, 1996
    Assignee: Fujitsu Limited
    Inventor: Katsuhiko Tanahashi