Patents by Inventor Atsushi Tsuyuki

Atsushi Tsuyuki 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).

  • Signal multiplexing method, signal demultiplexing method, digital signal reference frequency correction method, multiplexing device, demultiplexing device, radio communication system, and digital signal reference frequency correction device
    Patent number: 8804769
    Abstract: A multiplexing/demultiplexing device has a phase difference detection part for detecting a phase difference from a reference frequency of a multiplexed signal and a reference frequency of each of input/output lines, an interpolation part for performing an interpolation on a digital transmitting/receiving signal of each of the input/output lines with a signal delayed by time corresponding to the phase difference for each of the input/output lines based on the phase difference detected by the phase difference detection part to obtain a digital transmitting/receiving signal sampled with the reference frequency of the multiplexed signal for each of the input/output lines, and a signal multiplexing/demultiplexing part for performing a multiplex/demultiplex of the digital transmitting/receiving signals of the input/output lines with use of the reference frequency of the multiplexed signal.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: August 12, 2014
    Assignees: NEC Corporation, NTT Docomo, Inc.
    Inventors: Hiroki Tanaka, Motoya Iwasaki, Toshifumi Sato, Yoshitsugu Shimazu, Atsushi Tsuyuki
  • SIGNAL MULTIPLEXING METHOD, SIGNAL DEMULTIPLEXING METHOD, DIGITAL SIGNAL REFERENCE FREQUENCY CORRECTION METHOD, MULTIPLEXING DEVICE, DEMULTIPLEXING DEVICE, RADIO COMMUNICATION SYSTEM, AND DIGITAL SIGNAL REFERENCE FREQUENCY CORRECTION DEVICE
    Publication number: 20110002247
    Abstract: A multiplexing/demultiplexing device has a phase difference detection part for detecting a phase difference from a reference frequency of a multiplexed signal and a reference frequency of each of input/output lines, an interpolation part for performing an interpolation on a digital transmitting/receiving signal of each of the input/output lines with a signal delayed by time corresponding to the phase difference for each of the input/output lines based on the phase difference detected by the phase difference detection part to obtain a digital transmitting/receiving signal sampled with the reference frequency of the multiplexed signal for each of the input/output lines, and a signal multiplexing/demultiplexing part for performing a multiplex/demultiplex of the digital transmitting/receiving signals of the input/output lines with use of the reference frequency of the multiplexed signal.
    Type: Application
    Filed: March 3, 2009
    Publication date: January 6, 2011
    Inventors: Hiroki Tanaka, Motoya Iwasaki, Toshifumi Sato, Atsushi Tsuyuki