Patents by Inventor Kazuo Kubo

Kazuo Kubo 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).

  • Publication number: 20210067174
    Abstract: A transmitter according to the disclosure includes: an encoding unit that generates a code word by performing coding with a low-density parity-check code using a check matrix, the encoding unit being capable of switching the check matrix for use in generating the code word, between a first check matrix with a first code rate and a second check matrix with a second code rate smaller than the first code rate, the first check matrix containing a plurality of cyclic permutation matrices, the encoding unit generating the second check matrix by masking the cyclic permutation matrix at a predetermined position in the first check matrix and adding a row with a column weight equal to or less than a threshold; and a transmission unit that transmits the code word.
    Type: Application
    Filed: November 16, 2020
    Publication date: March 4, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kazuo Kubo, Hideo Yoshida
  • Publication number: 20210054373
    Abstract: An object of the present invention is to provide novel double-stranded RNA having an RNA interference effect, in which the cellular uptake and the resistance to enzymatic degradation are improved, without reducing the RNA interference effect.
    Type: Application
    Filed: June 29, 2020
    Publication date: February 25, 2021
    Inventors: Takanori Kubo, Hideki Ohba, Kazuo Sakurai, Jusaku Minari, Atsushi Uno
  • Patent number: 10917116
    Abstract: Provided is an error correction device including an encoding circuit configured to encode a plurality of error correction code sequences, in which the encoding circuit includes a plurality of encoding circuits connected in parallel, and is configured to execute encoding processing for the plurality of error correction code sequences through use of all the plurality of encoding circuits by adjusting an output bus width and a frequency of an operation clock with respect to a difference in transmission rate for any payloads input in one or more systems.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: February 9, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideo Yoshida, Kazuo Kubo, Kenji Ishii, Kenya Sugihara, Takashi Sugihara
  • Publication number: 20200382134
    Abstract: Provided is an optical transmission/reception device including an error correction decoding unit (36) for decoding a received sequence encoded with an LDPC code, in which the error correction decoding unit (36) is configured to perform decoding processing using a parity check matrix (70) of a spatially-coupled LDPC code, which includes a plurality of parity check sub-matrices (71) combined with each other, in which the decoding processing is windowed decoding processing that uses a window (80) over one or more parity check sub-matrices (71), and in which a window size of the window (80) and a decoding iteration count due to throughput and requested correction performance are variable and input from a control circuit (12) connected to the error correction decoding device (36).
    Type: Application
    Filed: February 2, 2017
    Publication date: December 3, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenji ISHII, Kazuo KUBO, Kenya SUGIHARA, Hideo YOSHIDA
  • Patent number: 10738304
    Abstract: An object of the present invention is to provide novel double-stranded RNA having an RNA interference effect, in which the cellular uptake and the resistance to enzymatic degradation are improved, without reducing the RNA interference effect.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: August 11, 2020
    Assignee: NAPA JENOMICS CO., LTD.
    Inventors: Takanori Kubo, Hideki Ohba, Kazuo Sakurai, Jusaku Minari, Atsushi Uno
  • Publication number: 20200244286
    Abstract: Provided is an optical transmission/reception device including: an error correction encoding unit configured to encode a sequence to be transmitted with one type of LDPC code; and an error correction decoding unit configured to decode a received sequence encoded with the LDPC code. The error correction decoding unit performs decoding processing for the received sequence based on a check matrix of an LDPC convolutional code. The decoding processing is windowed decoding processing, which is performed by using a window extending over one or more check submatrices. A window size of the window and a decoding iteration count are configured to be variable, and the window size and the decoding iteration count are input from a control circuit connected to the error correction decoding unit.
    Type: Application
    Filed: November 27, 2017
    Publication date: July 30, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Kazuo KUBO
  • Patent number: 10595764
    Abstract: An emotion identification device includes: a first detection unit which detects a central nervous system reaction of a user; a second detection unit which detects an autonomic nervous system reaction of the user; and an identification unit which identifies aggressiveness in anger of the user based on the central nervous system reaction and the autonomic nervous system reaction.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: March 24, 2020
    Assignee: Japan Science and Technology Agency
    Inventors: Kenta Kubo, Nobuyuki Kawai, Kazuo Okanoya
  • Publication number: 20200021311
    Abstract: Provided is an error correction device including an encoding circuit configured to encode a plurality of error correction code sequences, in which the encoding circuit includes a plurality of encoding circuits connected in parallel, and is configured to execute encoding processing for the plurality of error correction code sequences through use of all the plurality of encoding circuits by adjusting an output bus width and a frequency of an operation clock with respect to a difference in transmission rate for any payloads input in one or more systems.
    Type: Application
    Filed: March 9, 2017
    Publication date: January 16, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hideo YOSHIDA, Kazuo KUBO, Kenji ISHII, Kenya SUGIHARA, Takashi SUGIHARA
  • Patent number: 10128940
    Abstract: An optical transmission method wavelength-multiplexing and transmitting multiple channels including data. The data are composed of data areas independent between the channels and data areas non-independent between the channels. Data patterns of the data areas non-independent between the channels are variable. The data patterns of the data areas non-independent between the channels are set so that in time periods of the non-independent data areas on an optical transmission section, a time period during which polarization states of the multiple channels are correlated in the optical transmission section has a length such that an error rate is less than or equal to a threshold value, the error rate being determined from a temporal distribution of bit errors obtained from a result of error decision after demodulation in an optical receiver.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: November 13, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Goto, Tsuyoshi Yoshida, Kiyoshi Onohara, Takashi Sugihara, Kazuo Kubo, Tatsuya Kobayashi, Keisuke Matsuda, Masashi Binkai
  • Patent number: 10069585
    Abstract: A transmission device of a signal transmission system multiplexing and transmitting a plurality of 8B10B-coded information sequences, which includes: conversion units the number of which is identical to the number of the information sequences, to perform 8B10B-decoding of each of the information sequences, receive one of the information sequences after the decoding, scramble the received information sequence, and add a synchronous pattern indicating a head of a frame to the scrambled information sequence; and a multiplexing unit to multiplex the information sequence outputted from each of the conversion units.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: September 4, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshiaki Konishi, Kazuo Kubo
  • Publication number: 20180241492
    Abstract: A transmission device of a signal transmission system multiplexing and transmitting a plurality of 8B10B-coded information sequences, which includes: conversion units the number of which is identical to the number of the information sequences, to perform 8B10B-decoding of each of the information sequences, receive one of the information sequences after the decoding, scramble the received information sequence, and add a synchronous pattern indicating a head of a frame to the scrambled information sequence; and a multiplexing unit to multiplex the information sequence outputted from each of the conversion units.
    Type: Application
    Filed: December 14, 2015
    Publication date: August 23, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshiaki KONISHI, Kazuo KUBO
  • Patent number: 10057149
    Abstract: A delay measuring device of a communication system that includes the delay measuring device sequentially transmitting and receiving frames having a known frame length, and a measurement object device serving as an object for measuring a round trip time by the delay measuring device, includes: an RTT measuring unit to measure a round trip time with respect to the measurement object device a number of times using information for delay measurement in the frame; an RTT change detection unit to detect a change of a value of the round trip time based on the values of the round trip time thus measured; and an RTT determination unit to determine a value of the round trip time to be adopted, from among the values of the round trip time, based on the change of a value of the round trip time.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: August 21, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuta Takemoto, Kazuo Kubo, Yoshiaki Konishi
  • Patent number: 9973369
    Abstract: A likelihood generation apparatus for acquiring a likelihood of a 16QAM signal includes a first likelihood generation unit configured to generate a likelihood of each of two bits of a 16QAM signal point of the 16QAM signal from a relationship of each of an I-axis component and a Q-axis component with a likelihood when the 16QAM signal point is mapped on a constellation diagram, and a second likelihood generation unit configured to generate a likelihood of each of remaining two bits other than the two bits of the 16QAM signal point of the 16QAM signal based on a position of the 16QAM signal point in a lookup table, which is configured to input the I-axis component and the Q-axis component of the 16QAM signal point as arguments, and includes regions acquired by dividing the constellation diagram based on a possible value of each of the bits.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: May 15, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshiaki Konishi, Kenya Sugihara, Yoshikuni Miyata, Hideo Yoshida, Kazuo Kubo
  • Patent number: 9813280
    Abstract: A likelihood generation apparatus for acquiring a likelihood of a 16QAM signal includes a first likelihood generation unit configured to generate a likelihood of each of two bits of a 16QAM signal point of the 16QAM signal from a relationship of each of an I-axis component and a Q-axis component with a likelihood when the 16QAM signal point is mapped on a constellation diagram, and a second likelihood generation unit configured to generate a likelihood of each of remaining two bits other than the two bits of the 16QAM signal point of the 16QAM signal based on a position of the 16QAM signal point in a lookup table, which is configured to input the I-axis component and the Q-axis component of the 16QAM signal point as arguments, and includes regions acquired by dividing the constellation diagram based on a possible value of each of the bits.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: November 7, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshiaki Konishi, Kenya Sugihara, Yoshikuni Miyata, Hideo Yoshida, Kazuo Kubo
  • Patent number: 9780897
    Abstract: An optical transmission apparatus that accommodates client signals in a line signal, includes: an OPUn mapper unit that receives and maps the client signals; and a mapping control unit that determines the number of pieces of client data to be mapped to a payload portion and determines the timing to insert client data and information on the number of pieces of client data into the payload portion to control mapping performed in the OPUn mapper unit.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: October 3, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshiaki Konishi, Kazuo Kubo
  • Publication number: 20170237639
    Abstract: A delay measuring device of a communication system that includes the delay measuring device sequentially transmitting and receiving frames having a known frame length, and a measurement object device serving as an object for measuring a round trip time by the delay measuring device, includes: an RTT measuring unit to measure a round trip time with respect to the measurement object device a number of times using information for delay measurement in the frame; an RTT change detection unit to detect a change of a value of the round trip time based on the values of the round trip time thus measured; and an RTT determination unit to determine a value of the round trip time to be adopted, from among the values of the round trip time, based on the change of a value of the round trip time.
    Type: Application
    Filed: September 15, 2015
    Publication date: August 17, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuta TAKEMOTO, Kazuo KUBO, Yoshiaki KONISHI
  • Patent number: 9621291
    Abstract: Provided is an optical communication cross-connection device for exchanging an OTN signal through optical communications, including: a plurality of OTN signal processing units (OTNsp units) for asynchronously conducting OTN signal processing; and a space switch connected between the plurality of OTNsp units, for conducting bidirectional signal exchange for the OTN signal, in which a first and a second OTNsp units that conduct signal transmission among the plurality of OTNsp units subject the OTN signal to skew processing on one side and deskew processing corresponding to the skew processing on another side between the first and second OTNsp units or between a communicating end-side one of the first and second OTNsp units and a communicating end-side OTNsp unit of an optical communication cross-connection device of a communication counterpart destination for the optical communication cross-connection device, and share a clock for the signal transmission therebetween.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: April 11, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Soichiro Kametani, Kazuo Kubo, Kazuumi Koguchi, Yoshiaki Konishi
  • Publication number: 20170041067
    Abstract: An optical transmission method wavelength-multiplexes and transmits multiple channels. Data transmitted on the wavelength-multiplexed channels are composed of data areas independent between the channels and data areas non-independent between the channels. Data patterns of the data areas non-independent between the channels are variable. This reduces the time period during which polarization states of the multiple channels are correlated, thereby reducing non-linear optical effects occurring between the channels and reducing deterioration in signal quality at a receiving end.
    Type: Application
    Filed: April 16, 2015
    Publication date: February 9, 2017
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroki GOTO, Tsuyoshi YOSHIDA, Kiyoshi ONOHARA, Takashi SUGIHARA, Kazuo KUBO, Tatsuya KOBAYASHI, Keisuke MATSUDA, Masashi BINKAI
  • Patent number: 9564974
    Abstract: An optical transmission device for transmitting and receiving a multilevel-modulated optical signal includes a plurality of transmission frame processors for generating transmission frame signals accommodating a plurality of client signals that are each subjected to error correction processing and scrambling/descrambling processing, and a digital modulator/demodulator for mapping the transmission frame signals that are input to and output from the plurality of transmission frame processors to a multilevel signal. The digital modulator/demodulator performs digital modulation/demodulation, in which the plurality of transmission frame processors each have a function of shifting a phase of a pattern between a plurality of transmission frames to be mapped to a multilevel signal and to be digitally modulated/demodulated.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: February 7, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshiaki Konishi, Kazuo Kubo
  • Publication number: 20170012726
    Abstract: An optical transmission apparatus that accommodates client signals in a line signal, includes: an OPUn mapper unit that receives and maps the client signals; and a mapping control unit that determines the number of pieces of client data to be mapped to a payload portion and determines the timing to insert client data and information on the number of pieces of client data into the payload portion to control mapping performed in the OPUn mapper unit.
    Type: Application
    Filed: January 13, 2015
    Publication date: January 12, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshiaki KONISHI, Kazuo KUBO