Patents by Inventor Akihiro Okazaki

Akihiro Okazaki 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: 11290312
    Abstract: A transmission apparatus that transmits a block signal including a plurality of data symbols, includes: a data-symbol generation unit that generates a data symbol; a symbol arrangement unit that arranges the data symbol and a same-quadrant symbol such that one same-quadrant symbol that becomes a signal point in a same quadrant in a complex plane is inserted per block at a predetermined position in each block signal to generate a block symbol; a CP insertion unit that inserts a Cyclic Prefix into the block symbol; and an interpolation unit that performs interpolation processing on the block symbol on which CP insertion has been performed.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: March 29, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumihiro Hasegawa, Hiroshi Nishimoto, Akihiro Okazaki, Masatsugu Higashinaka
  • Patent number: 11175058
    Abstract: Provided herein is an air cleaner (200) that includes: a communication interface (260) that receives information concerning operation contents from a server (100); and a processor (210) that, upon partial or complete termination of communication with the server (100), initializes the information concerning operation contents, or initializes a setting concerning acquisition of the information concerning operation contents.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: November 16, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Akihiro Okazaki
  • Publication number: 20210325062
    Abstract: An air purifier (100) includes a detection unit (130) and a control unit (110). The detection unit (130) periodically detects environment information. The environment information indicates information relating to an environment around the air purifier (100). The control unit (110) determines whether or not the environment information satisfies a specific condition a plurality of times during the specific time period (Ts) corresponding to an event within a prescribed period (Ta). In a case where the control unit (110) determines that the environment information satisfies the specific condition a plurality of times, the control unit switches a mode from a learning mode to an implementation mode. In the implementation mode, in a case where the environment information meets a trigger during the specific time period, the control unit (110) performs event operational control.
    Type: Application
    Filed: September 3, 2019
    Publication date: October 21, 2021
    Inventors: AKIHIRO OKAZAKI, DAISUKE MORIUCHI
  • Publication number: 20210235661
    Abstract: An air purifier (100) includes a control unit (110). The control unit (110) is configured to acquire occupancy information indicating whether or not a person is in a room. The control unit (110) is configured to switch operational control based on a type of pet specified by a user and the occupancy information. When a person is not in the room, the control unit (110) preferably performs operational control to increase an airflow compared to that when a person is in the room.
    Type: Application
    Filed: September 3, 2019
    Publication date: August 5, 2021
    Inventors: AKIHIRO OKAZAKI, YOSHIAKI FUKUDA
  • 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: 20210083731
    Abstract: A base station device that forms a plurality of beams TB necessary for covering the entire service area and transmits a communication signal in a time-division manner with each of the plurality of beams TB, and a terminal device that receives the beams TB emitted from the base station device are included. Communication from the base station device to the terminal device is performed with a beam-forming technique. The terminal device compares the received power value of the communication signal in each of the plurality of beams TB received from the base station device with the terminal allowable power value of the terminal device, and, on the basis of the comparison result, transmits a specific signal for selecting a beam TB from the plurality of beams TB to the base station device.
    Type: Application
    Filed: November 30, 2020
    Publication date: March 18, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hideyuki NAKAMIZO, Kenichi TAJIMA, Akihiro OKAZAKI, Shigeru UCHIDA, Noriyuki FUKUI
  • 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
  • Patent number: 10887142
    Abstract: The present invention is a transmitter compatible with a multicarrier block transmission scheme. The transmitter includes: a fixed sequence generation unit that generates a fixed sequence; a data sequence generation unit that converts data symbols into a time domain signal to generate a data signal; a multiplexing unit that divides the fixed sequence into two divisions, places one of the two divisions at the head and another one of the two divisions at the tail of a block, and places a data sequence that is an output signal from the data sequence generation unit between the two divisions to generate a block signal; and an interpolation unit that performs interpolation processing on the block signal.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: January 5, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Fumihiro Hasegawa, Akihiro Okazaki
  • Publication number: 20200235970
    Abstract: The present invention is a transmitter compatible with a multicarrier block transmission scheme. The transmitter includes: a fixed sequence generation unit that generates a fixed sequence; a data sequence generation unit that converts data symbols into a time domain signal to generate a data signal; a multiplexing unit that divides the fixed sequence into two divisions, places one of the two divisions at the head and another one of the two divisions at the tail of a block, and places a data sequence that is an output signal from the data sequence generation unit between the two divisions to generate a block signal; and an interpolation unit that performs interpolation processing on the block signal.
    Type: Application
    Filed: March 9, 2017
    Publication date: July 23, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro HASEGAWA, Akihiro OKAZAKI
  • Publication number: 20200228378
    Abstract: A transmission apparatus that transmits a block signal including a plurality of data symbols, includes: a data-symbol generation unit that generates a data symbol; a symbol arrangement unit that arranges the data symbol and a same-quadrant symbol such that one same-quadrant symbol that becomes a signal point in a same quadrant in a complex plane is inserted per block at a predetermined position in each block signal to generate a block symbol; a CP insertion unit that inserts a Cyclic Prefix into the block symbol; and an interpolation unit that performs interpolation processing on the block symbol on which CP insertion has been performed.
    Type: Application
    Filed: March 27, 2020
    Publication date: July 16, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro HASEGAWA, Hiroshi NISHIMOTO, Akihiro OKAZAKI, Masatsugu HIGASHINAKA
  • Publication number: 20200170082
    Abstract: Provided is a cooking device capable of being provided with a radio communication device so that the radio communication device establishes a satisfactory communication, instead of (i) further providing any special configuration in which the radio communication device is provided and (ii) making any change in structure of the cooking device. According to a cooking device (1), a space for providing a radio communication adapter is secured in a frame (3b) of a door (3) or in a circuit storing section (50), made of a nonmetal, which is configured to store a driving circuit of a display operation section (5).
    Type: Application
    Filed: January 29, 2020
    Publication date: May 28, 2020
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazutoshi TAKIMOTO, Tadanori SUGIMURA, Akihiro OKAZAKI
  • Patent number: 10644920
    Abstract: A transmission apparatus that transmits a block signal including a plurality of data symbols, includes: a data-symbol generation unit that generates a data symbol; a symbol arrangement unit that arranges the data symbol and a same-quadrant symbol such that one same-quadrant symbol that becomes a signal point in a same quadrant in a complex plane is inserted per block at a predetermined position in each block signal to generate a block symbol; a CP insertion unit that inserts a Cyclic Prefix into the block symbol; and an interpolation unit that performs interpolation processing on the block symbol on which CP insertion has been performed.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: May 5, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumihiro Hasegawa, Hiroshi Nishimoto, Akihiro Okazaki, Masatsugu Higashinaka
  • Patent number: 10602572
    Abstract: Provided is a cooking device capable of being provided with a radio communication device so that the radio communication device establishes a satisfactory communication, instead of (i) further providing any special configuration in which the radio communication device is provided and (ii) making any change in structure of the cooking device. According to a cooking device (1), a space for providing a radio communication adapter is secured in a frame (3b) of a door (3) or in a circuit storing section (50), made of a nonmetal, which is configured to store a driving circuit of a display operation section (5).
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: March 24, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kazutoshi Takimoto, Tadanori Sugimura, Akihiro Okazaki
  • Publication number: 20200080737
    Abstract: Provided herein is an air cleaner (200) that includes: a communication interface (260) that receives information concerning operation contents from a server (100); and a processor (210) that, upon partial or complete termination of communication with the server (100), initializes the information concerning operation contents, or initializes a setting concerning acquisition of the information concerning operation contents.
    Type: Application
    Filed: December 28, 2017
    Publication date: March 12, 2020
    Inventor: AKIHIRO OKAZAKI
  • 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
  • Patent number: 10381723
    Abstract: A wireless communication apparatus, for example a wireless base station that spatially multiplexes data for transmission, includes plural array antennas and a beam shape controller that controls the array antennas to form beams of different shapes and each transmit signals for communication quality measurement in an area to be covered by the apparatus, and determines an initial value of a beam shape to be used in data transmission to a counterpart device that has received the signal for communication quality measurement, and after the initial value is determined, repeatedly executes processing to control the array antennas to tentatively change a beam shape in use in data transmission to the counterpart device, and redetermine a beam shape to be used in data transmission to the counterpart device, based on communication quality measured when the post-tentative-change beam shape is used and communication quality measured when the pre-tentative-change beam shape is used.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: August 13, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shigeru Uchida, Akihiro Okazaki, Akinori Taira
  • Publication number: 20180159712
    Abstract: A transmission apparatus that transmits a block signal including a plurality of data symbols, includes: a data-symbol generation unit that generates a data symbol; a symbol arrangement unit that arranges the data symbol and a same-quadrant symbol such that one same-quadrant symbol that becomes a signal point in a same quadrant in a complex plane is inserted per block at a predetermined position in each block signal to generate a block symbol; a CP insertion unit that inserts a Cyclic Prefix into the block symbol; and an interpolation unit that performs interpolation processing on the block symbol on which CP insertion has been performed.
    Type: Application
    Filed: February 1, 2018
    Publication date: June 7, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro Hasegawa, Hiroshi Nishimoto, Akihiro Okazaki, Masatsugu Higashinaka
  • Publication number: 20180138590
    Abstract: A wireless communication apparatus, for example a wireless base station that spatially multiplexes data for transmission, includes plural array antennas and a beam shape controller that controls the array antennas to form beams of different shapes and each transmit signals for communication quality measurement in an area to be covered by the apparatus, and determines an initial value of a beam shape to be used in data transmission to a counterpart device that has received the signal for communication quality measurement, and after the initial value is determined, repeatedly executes processing to control the array antennas to tentatively change a beam shape in use in data transmission to the counterpart device, and redetermine a beam shape to be used in data transmission to the counterpart device, based on communication quality measured when the post-tentative-change beam shape is used and communication quality measured when the pre-tentative-change beam shape is used.
    Type: Application
    Filed: August 5, 2015
    Publication date: May 17, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shigeru UCHIDA, Akihiro OKAZAKI, Akinori TAIRA