Patents by Inventor Riichirou Nagareda

Riichirou Nagareda 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).

  • Channel state information compressing apparatus and method, channel state information expanding apparatus and method, computer programs, receiver, and transmitter
    Patent number: 8638845
    Abstract: A channel state information compressing apparatus includes a time-to-frequency region converter that converts a region for channel state information which indicates a state of each communication channel from a time region to a frequency region; and an adaptive selector that selects each frequency component to be included in compressed data based on electric power of the frequency component from among frequency region data obtained by the time-to-frequency region converter. The channel state information compressing apparatus outputs the compressed data consisting of each selected frequency component, and information for identifying each frequency component which forms the compressed data.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: January 28, 2014
    Assignee: KDDI Corporation
    Inventors: Yasuyuki Hatakawa, Tadayuki Fukuhara, Riichirou Nagareda
  • CHANNEL STATE INFORMATION COMPRESSING APPARATUS AND METHOD, CHANNEL STATE INFORMATION EXPANDING APPARATUS AND METHOD, COMPUTER PROGRAMS, RECEIVER, AND TRANSMITTER
    Publication number: 20110135021
    Abstract: A channel state information compressing apparatus includes a time-to-frequency region converter that converts a region for channel state information which indicates a state of each communication channel from a time region to a frequency region; and an adaptive selector that selects each frequency component to be included in compressed data based on electric power of the frequency component from among frequency region data obtained by the time-to-frequency region converter. The channel state information compressing apparatus outputs the compressed data consisting of each selected frequency component, and information for identifying each frequency component which forms the compressed data.
    Type: Application
    Filed: November 17, 2010
    Publication date: June 9, 2011
    Inventors: Yasuyuki HATAKAWA, Tadayuki Fukuhara, Riichirou Nagareda