Patents by Inventor Akinori Taira

Akinori Taira 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).

  • Patent number: 11184137
    Abstract: A lower base station according to the present invention includes: a CSI acquisition unit that acquires channel information indicating a channel state between the lower base station and one or more mobile terminals; a lower scheduler unit that transmits the channel information to a higher base station, and determines the number of signal streams and a modulation and coding scheme for a destination terminal that is a mobile terminal selected from among the one or more mobile terminals, based on the destination terminal and a data transmission rate for the destination terminal, sent for notification by the higher base station; and an MU-MIMO signal processing unit that performs Multi User-Multiple Input Multiple Output precoding for the mobile terminal.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: November 23, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroshi Nishimoto, Akinori Taira, Shigeru Uchida
  • Publication number: 20210314791
    Abstract: A transmission device according to the present invention includes a reference-signal information management unit as an identifier to identify an interfering terminal that is a possible terminal to perform communication interfering with communication with a target terminal that is a destination terminal of a data signal, and a transmitter to set a group ID for reference signal generation to a group formed by the interfering terminal and the target terminal.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 7, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Fumihiro Hasegawa, Akinori Taira
  • Patent number: 11076305
    Abstract: A transmission device according to the present invention includes a reference-signal information management unit as an identifier to identify an interfering terminal that is a possible terminal to perform communication interfering with communication with a target terminal that is a destination terminal of a data signal, and a transmitter to set a group ID for reference signal generation to a group formed by the interfering terminal and the target terminal.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: July 27, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumihiro Hasegawa, Akinori Taira
  • Patent number: 11050595
    Abstract: The present invention relates to a method implemented by computer means of a communicating entity, for inserting a reference signal for phase tracking, said communicating entity using a discrete Fourier transformation spread orthogonal frequency division multiplexing modulator, characterized in that the method comprises: obtaining a succession of signal samples by inserting said reference signal for phase tracking within a succession of data samples, according to at least one insertion pattern chosen among pre-defined patterns with respect to predetermined criteria of communication conditions, and feeding said modulator with a succession of signal blocks obtained from said succession of signal samples, so as to apply the discrete Fourier transformation after the insertion of the reference signal for phase tracking.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 29, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Cristina Ciochina-Duchesne, Fumihiro Hasegawa, Akihiro Okazaki, Akinori Taira
  • Publication number: 20210135805
    Abstract: A base station includes: a control unit that allocates one or more layers per terminal for transmission to one or more terminals, and configures positions in a frequency domain and a time domain of reference signals of each of the layers on the basis of at least one of information indicating a position of each of the terminals and information indicating condition of each of channel between the transmission device and the one or more terminals; a processing unit that arranges the reference signals of each of the layers in the frequency domain and the time domain on the basis of the positions in the frequency domain and the time domain configured by the control unit; and a precoding unit and a transmitting unit that perform space-division multiplexing on signals of one or more layers arranged by the processing unit, and transmit the multiplexed signals.
    Type: Application
    Filed: January 8, 2021
    Publication date: May 6, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Fumihiro HASEGAWA, Akinori TAIRA, Shigeru UCHIDA, Noriyuki FUKUI, Akihiro OKAZAKI, Hiroki IURA
  • Publication number: 20210126757
    Abstract: A lower base station according to the present invention includes: a CSI acquisition unit that acquires channel information indicating a channel state between the lower base station and one or more mobile terminals; a lower scheduler unit that transmits the channel information to a higher base station, and determines the number of signal streams and a modulation and coding scheme for a destination terminal that is a mobile terminal selected from among the one or more mobile terminals, based on the destination terminal and a data transmission rate for the destination terminal, sent for notification by the higher base station; and an MU-MIMO signal processing unit that performs Multi User-Multiple Input Multiple Output precoding for the mobile terminal.
    Type: Application
    Filed: June 27, 2017
    Publication date: April 29, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroshi NISHIMOTO, Akinori TAIRA, Shigeru UCHIDA
  • Patent number: 10931413
    Abstract: A base station (1) according to the present invention includes: a control unit (10) that allocates one or more layers per terminal for transmission to one or more terminals, and configures positions in a frequency domain and a time domain of reference signals of each of the layers on the basis of at least one of information indicating a position of each of the terminals and information indicating condition of each of channel between the transmission device and the one or more terminals; a processing unit (12-1 to 12-N) that arranges the reference signals of each of the layers in the frequency domain and the time domain on the basis of the positions in the frequency domain and the time domain configured by the control unit (10); and a precoding unit (13) and a transmitting unit (14) that perform space-division multiplexing on signals of one or more layers arranged by the processing unit (12-1 to 12-N), and transmit the multiplexed signals.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: February 23, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Fumihiro Hasegawa, Akinori Taira, Shigeru Uchida, Noriyuki Fukui, Akihiro Okazaki, Hiroki Iura
  • Publication number: 20210014642
    Abstract: A mobile apparatus according to the disclosure includes: a sensor unit to calculate a moving distance and a moving direction; a positioning unit to calculate a first current position by using positioning information for positioning provided in a calibration area that is among areas in which the positioning information is provided, the calibration area being the area in which first reliability representing accuracy of the positioning information is equal to or higher than a first threshold; a current position calculation unit to estimate a second current position by using the moving distance and the moving direction calculated by the sensor unit; and a calibration unit to calibrate a parameter to be used to estimate the second current position in the current position calculation unit, by using the first current position.
    Type: Application
    Filed: September 28, 2020
    Publication date: January 14, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akinori TAIRA, Seiji KOZAKI
  • Patent number: 10862603
    Abstract: A base station serving as a transmission apparatus includes a plurality of transmission antennas capable of forming beams directed to a plurality of terminals, which are reception apparatus, and a precoder configured to perform outer precoding on transmission signals transmitted from the plurality of transmission antennas. The plurality of terminals include at least one first reception apparatus, which are transmission destinations of the transmission signals, and second reception apparatus, which are reception apparatus other than the first reception apparatus. The precoder performs outer precoding on the transmission signals transmitted from the plurality of transmission antennas so that received power in the second reception apparatus among the plurality of reception apparatus is equal to or less than a threshold.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: December 8, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroshi Nishimoto, Hiroki Iura, Akinori Taira
  • Patent number: 10803751
    Abstract: A processing device according to the present invention includes an object identification unit that generates, based on data measured by sensors, an object identification information that is information indicative of a state of an object, and a reliability degree determination unit that determines a reliability degree of the object identification information using at least one of individual information of the sensors, environmental information obtained when the sensors have performed the measurement, and time information that is a time at which the sensors have performed measurement.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: October 13, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji Kozaki, Akinori Taira, Kenichi Nakura
  • Publication number: 20200252254
    Abstract: When arranging a reference signal generated by a pseudorandom number on specified time and frequency, an information processing unit (101) determines whether or not to arrange a 1 OFDM symbol or 2 OFDM symbols including a reference signal at a position determined in each slot, and determines whether or not to additionally arrange an OFDM symbol including a reference signal in the same slot. A multiplexing unit (108) performs multiplexing of a reference signal in accordance with the determination by the information processing unit (101).
    Type: Application
    Filed: August 10, 2017
    Publication date: August 6, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro HASEGAWA, Akinori TAIRA
  • Publication number: 20200169442
    Abstract: A transmitting apparatus includes a first signal generating unit that generates, on the basis of data a first signal transmitted by single carrier block transmission; a second signal generating unit that generates, on the basis of an RS, a second signal transmitted by orthogonal frequency division multiplex transmission; a switching operator that selects and outputs the second signal in a first transmission period and selects and outputs the first signal in a second transmission period; an antenna that transmits the signal output from the switching operator; and a control-signal generating unit that controls the second signal generating unit such that, in the first transmission period, the RS is arranged in a frequency band allocated for transmission of the RS from the transmitting apparatus among frequency bands usable in OFDM.
    Type: Application
    Filed: January 30, 2020
    Publication date: May 28, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro Hasegawa, Akinori Taira
  • Patent number: 10623068
    Abstract: A transmission device to be applied to a communication system configured to carry out multi-user MIMO downlink communication, includes a precoder configured to apply transmission precoding processing, a nonlinear processor configured to carry out successive interference cancellation, a beam forming controller configured to form a plurality of beams and to control a beam radiation direction, and a user ordering processor configured to estimate a positional relationship among the plurality of user terminals from radiation direction information on each of the beams, order users in ascending order of a distance from a specific user, and determine a pairing of a transmission target user and an interference permissible user. The precoder determines two users of the transmission target user and the interference permissible user for each user based on the pairing result, and carries out null steering for users other than the two users, to thereby carry out the transmission precoding processing.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: April 14, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akinori Taira, Hiroshi Nishimoto
  • Patent number: 10594527
    Abstract: A transmitting apparatus includes a first signal generating unit that generates, on the basis of data a first signal transmitted by single carrier block transmission; a second signal generating unit that generates, on the basis of an RS, a second signal transmitted by orthogonal frequency division multiplex transmission; a switching operator that selects and outputs the second signal in a first transmission period and selects and outputs the first signal in a second transmission period; an antenna that transmits the signal output from the switching operator; and a control-signal generating unit that controls the second signal generating unit such that, in the first transmission period, the RS is arranged in a frequency band allocated for transmission of the RS from the transmitting apparatus among frequency bands usable in OFDM.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: March 17, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumihiro Hasegawa, Akinori Taira
  • Publication number: 20200052840
    Abstract: The base station allocates, to one terminal, at least one transmission layer and allocates at least one resource block that is a minimum allocation unit of a communication resource in each transmission layer, to transmit a signal to the terminal, and includes processing units each associated with one of the transmission layers, the processing units being equal in number to the transmission layers. Each processing unit includes a reference signal generation unit to generate a reference signal to be used by the terminal in demodulation processing on a received signal, and an information processing unit to determine an arrangement of the resource block in which to transmit the reference signal to the terminal, based on at least one of a state of a channel between the base station and the terminal or information on the resource block to be used in transmission of the reference signal in an adjacent cell.
    Type: Application
    Filed: April 27, 2017
    Publication date: February 13, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro HASEGAWA, Akinori TAIRA, Hiroki IURA, Shigeru UCHIDA, Mitsuru MOCHIZUKI, Tadahiro SHIMODA
  • Publication number: 20200043339
    Abstract: A processing device according to the present invention includes an object identification unit that generates, based on data measured by sensors, an object identification information that is information indicative of a state of an object, and a reliability degree determination unit that determines a reliability degree of the object identification information using at least one of individual information of the sensors, environmental information obtained when the sensors have performed the measurement, and time information that is a time at which the sensors have performed measurement.
    Type: Application
    Filed: April 26, 2017
    Publication date: February 6, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Seiji KOZAKI, Akinori TAIRA, Kenichi NAKURA
  • Publication number: 20200007369
    Abstract: The present invention relates to a method implemented by computer means of a communicating entity, for inserting a reference signal for phase tracking, said communicating entity using a discrete Fourier transformation spread orthogonal frequency division multiplexing modulator, characterized in that the method comprises: obtaining a succession of signal samples by inserting said reference signal for phase tracking within a succession of data samples, according to at least one insertion pattern chosen among pre-defined patterns with respect to predetermined criteria of communication conditions, and feeding said modulator with a succession of signal blocks obtained from said succession of signal samples, so as to apply the discrete Fourier transformation after the insertion of the reference signal for phase tracking.
    Type: Application
    Filed: December 27, 2017
    Publication date: January 2, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Cristina CIOCHINA-DUCHESNE, Fumihiro HASEGAWA, Akihiro OKAZAKI, Akinori TAIRA
  • Publication number: 20190393999
    Abstract: A base station includes: a control unit that allocates one or more layers per terminal for transmission to one or more terminals, and configures positions in a frequency domain and a time domain of reference signals of each of the layers on the basis of at least one of information indicating a position of each of the terminals and information indicating condition of each of channel between the transmission device and the one or more terminals; a processing unit that arranges the reference signals of each of the layers in the frequency domain and the time domain on the basis of the positions in the frequency domain and the time domain configured by the control unit; and a precoding unit and a transmitting unit that perform space-division multiplexing on signals of one or more layers arranged by the processing unit, and transmit the multiplexed signals.
    Type: Application
    Filed: December 7, 2016
    Publication date: December 26, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Fumihiro HASEGAWA, Akinori TAIRA, Shigeru UCHIDA, Noriyuki FUKUI, Akihiro OKAZAKI, Hiroki IURA
  • Publication number: 20190380049
    Abstract: A transmission device according to the present invention includes a reference-signal information management unit as an identifier to identify an interfering terminal that is a possible terminal to perform communication interfering with communication with a target terminal that is a destination terminal of a data signal, and a transmitter to set a group ID for reference signal generation to a group formed by the interfering terminal and the target terminal.
    Type: Application
    Filed: January 10, 2018
    Publication date: December 12, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Fumihiro Hasegawa, Akinori Taira
  • Publication number: 20190372631
    Abstract: A transmission device to be applied to a communication system configured to carry out multi-user MIMO downlink communication, includes a precoder configured to apply transmission precoding processing, a nonlinear processor configured to carry out successive interference cancellation, a beam forming controller configured to form a plurality of beams and to control a beam radiation direction, and a user ordering processor configured to estimate a positional relationship among the plurality of user terminals from radiation direction information on each of the beams, order users in ascending order of a distance from a specific user, and determine a pairing of a transmission target user and an interference permissible user. The precoder determines two users of the transmission target user and the interference permissible user for each user based on the pairing result, and carries out null steering for users other than the two users, to thereby carry out the transmission precoding processing.
    Type: Application
    Filed: June 20, 2016
    Publication date: December 5, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akinori TAIRA, Hiroshi NISHIMOTO