Patents by Inventor Hiroshi Nishimoto

Hiroshi Nishimoto 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: 9755722
    Abstract: In a transmission device, a coder performs SFBC block coding of a signal stream includes a divider equally dividing the stream into sub-streams of time lengths Msub and performs a cyclic shift of one or more sub-streams, a processor outputs the sub-streams and performs, on the sub-streams, time-axis inversion processing, complex conjugate processing and sign inversion processing, or the time-axis inversion processing and the complex conjugate processing, a phase rotation unit generates a repetitive signal of a time length N in which an output signal of the processor is reproduced and arranged, and giving phase rotation to the repetitive signal, and a multiplexer generates, for each transmission antenna, a signal transmitted from the antenna, by multiplexing the repetitive signals given the phase rotation, and the unit gives different phase rotations to repetitive signals multiplexed to an identical transmission signal.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: September 5, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hiroshi Nishimoto
  • Publication number: 20170237500
    Abstract: An optical transmitter that transmits an optical signal includes a dither superimposing circuit configured to generate a dither signal, the dither signal being used to control an operation of the optical transmitter to output the optical signal, and a control circuit configured to control intermittent superimposition of the dither signal onto a target to be controlled.
    Type: Application
    Filed: January 19, 2017
    Publication date: August 17, 2017
    Applicant: Fujitsu Optical Components Limited
    Inventor: Hiroshi NISHIMOTO
  • Publication number: 20170195156
    Abstract: A transmission apparatus that transmits a block signal including a plurality of data symbols, includes a data-symbol generation unit that generates data symbols; a fixed-symbol arrangement unit that arranges a data symbol and a fixed symbol such that the fixed symbol is inserted at a predetermined position in the block signal to generate a block symbol; an interpolation unit that performs interpolation processing on the block symbol; and a CP insertion unit that inserts a Cyclic Prefix into a signal on which the interpolation processing has been performed to generate the block signal.
    Type: Application
    Filed: March 22, 2017
    Publication date: July 6, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro HASEGAWA, Hiroshi NISHIMOTO, Masatsugu HIGASHINAKA, Akihiro OKAZAKI
  • Patent number: 9680681
    Abstract: A transmission apparatus that transmits a block signal including a plurality of data symbols, includes a data-symbol generation unit that generates data symbols; a fixed-symbol arrangement unit that arranges a data symbol and a fixed symbol such that the fixed symbol is inserted at a predetermined position in the block signal to generate a block symbol; an interpolation unit that performs interpolation processing on the block symbol; and a CP insertion unit that inserts a Cyclic Prefix into a signal on which the interpolation processing has been performed to generate the block signal.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: June 13, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumihiro Hasegawa, Hiroshi Nishimoto, Masatsugu Higashinaka, Akihiro Okazaki
  • Publication number: 20170163324
    Abstract: In a transmission device, a coder performs SFBC block coding of a signal stream includes a divider equally dividing the stream into sub-streams of time lengths Msub and performs a cyclic shift of one or more sub-streams, a processor outputs the sub-streams and performs, on the sub-streams, time-axis inversion processing, complex conjugate processing and sign inversion processing, or the time-axis inversion processing and the complex conjugate processing, a phase rotation unit generates a repetitive signal of a time length N in which an output signal of the processor is reproduced and arranged, and giving phase rotation to the repetitive signal, and a multiplexer generates, for each transmission antenna, a signal transmitted from the antenna, by multiplexing the repetitive signals given the phase rotation, and the unit gives different phase rotations to repetitive signals multiplexed to an identical transmission signal.
    Type: Application
    Filed: July 7, 2015
    Publication date: June 8, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventor: Hiroshi NISHIMOTO
  • Publication number: 20170135111
    Abstract: An antenna control device controls a plurality of antennas used for communicating with a mobile station that moves along a predetermined path in a radio communication system that includes a plurality of linear cells, each of which is formed by the antennas and in each of which each of the antennas sets a directionality in a same direction as a path of the mobile station and transmits an identical signal at an identical frequency, and that has two frequencies recurrently allocated in such a manner that adjacent linear cells use different frequencies for transmission. The antenna control device adjusts, in each of the linear cells, power distribution to each of the antennas that form the linear cell so as to be gradually decreased with distance in a direction of antenna directionality of each of the antennas.
    Type: Application
    Filed: October 7, 2015
    Publication date: May 11, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroshi NISHIMOTO, Shusaku UMEDA, Kaoru TSUKAMOTO, Yusuke KINOSHITA, Kazuyoshi TSUJI, Akihiro OKAZAKI
  • Publication number: 20170078436
    Abstract: According to an embodiment of the present invention, a wireless communication device includes a communication interface, a transferer, a storage, a storage controller, and a first controller. The transferer transfers a communication request acquired from a wireless communication terminal via the wireless connection by way of the communication interface or a different communication interface to a communication device which extracts a requested information identifier. The storage stores given information. The storage controller treats information in the storage.
    Type: Application
    Filed: September 13, 2016
    Publication date: March 16, 2017
    Inventors: Takeshi ISHIHARA, Hiroshi NISHIMOTO
  • Publication number: 20170033871
    Abstract: An optical transmitter has an optical modulator with a Mach-Zehnder interferometer, a pilot signal generator configured to generate a pilot signal to be superimposed on a drive signal for driving the optical modulator or on a substrate bias voltage applied to the optical modulator, and a controller configured to detect a ratio between a pilot component and a direct current component contained in a light output from the optical modulator and control at least one of an amplitude of the drive signal and a level of the substrate bias voltage such that the ratio becomes a constant value.
    Type: Application
    Filed: June 3, 2016
    Publication date: February 2, 2017
    Applicant: Fujitsu Optical Components Limited
    Inventor: Hiroshi NISHIMOTO
  • Patent number: 9477466
    Abstract: In general, according to one embodiment, an information processing apparatus includes an issuer and a communicator. The issuer issues an offload instruction corresponding to a first process executed in company with a first identifier capable of uniquely specifying a resource of a first arithmetic operation device. The communicator transmits the offload instruction to a second arithmetic operation device and receives a result of execution of the offload instruction from the second arithmetic operation device. In the second arithmetic operation device, the first identifier contained in the offload instruction is converted into a second identifier capable of uniquely specifying a resource of the second arithmetic operation device, and processing specified by the offload instruction is executed.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: October 25, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Nishimoto, Yuichiro Oyama, Takeshi Ishihara
  • Patent number: 9448458
    Abstract: An optical communication device has a pair of Mach-Zehnder optical modulators; a voltage monitor configured to monitor a voltage component acquired by optical-to-electric conversion of combined light output from the Mach-Zehnder optical modulators; a power monitor configured to monitor a power component acquired by square law detection of the optical-to-electric converted combined light from the Mach-Zehnder optical modulators; a first controller configured to control a substrate bias voltage or a driving amplitude applied to one of two waveguides of each of the Mach-Zehnder optical modulators based upon an output of the power monitor, and a second controller configured to control the substrate bias voltage or the driving amplitude applied to the other of the two waveguides of each of the Mach-Zehnder optical modulator based upon an output of the voltage monitor.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: September 20, 2016
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventors: Hiroshi Nishimoto, Akihiro Toya
  • Patent number: 9450679
    Abstract: An optical receiver includes: an optical receiving device configured to generate an analog received signal that represents a received modulated optical signal; an A/D converter configured to generate a digital received signal from the analog received signal; an E/O circuit configured to generate an optical digital signal from the digital received signal; an O/E circuit configured to generate an electric digital signal from the optical digital signal; and a digital signal processor configured to recover a data signal from the electric digital signal.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: September 20, 2016
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventor: Hiroshi Nishimoto
  • Patent number: 9400547
    Abstract: According to some embodiments, there is provided a communication device including: a processing unit and a notifying unit. The processing unit receives an acquisition request of first information from a requester and determines based on a predetermined condition whether or not the first information needs to be acquired from an acquisition destination of the first information. The notifying unit notifies a first response to the requester when the processing unit determines that the first information needs to be acquired, the first response containing an instruction of transitioning to a low power consumption status.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: July 26, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuichiro Oyama, Takeshi Ishihara, Hiroshi Nishimoto
  • Publication number: 20160147129
    Abstract: An optical communication device has a pair of Mach-Zehnder optical modulators; a voltage monitor configured to monitor a voltage component acquired by optical-to-electric conversion of combined light output from the Mach-Zehnder optical modulators; a power monitor configured to monitor a power component acquired by square law detection of the optical-to-electric converted combined light from the Mach-Zehnder optical modulators; a first controller configured to control a substrate bias voltage or a driving amplitude applied to one of two waveguides of each of the Mach-Zehnder optical modulators based upon an output of the power monitor, and a second controller configured to control the substrate bias voltage or the driving amplitude applied to the other of the two waveguides of each of the Mach-Zehnder optical modulator based upon an output of the voltage monitor.
    Type: Application
    Filed: November 24, 2015
    Publication date: May 26, 2016
    Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventors: Hiroshi Nishimoto, AKIHIRO TOYA
  • Publication number: 20160085683
    Abstract: According to one embodiment, a data receiving device includes: a communication circuit to receive first data and second data over a network; a first storage; a second storage in which data read or data write is performed by a fixed size block; and a processor. The processor sets a first buffer and a second buffer in the first storage. The processor writes tail data of the first data into the allocated area in the second buffer. The tail data has a size of a remainder that a first value is divided by a size of the first buffer, the first value being a value subtracted from a size of the first data by a size of the available area in the first buffer before writing of the first data. The processor writes the second data into an area sequential to the area of the tail data.
    Type: Application
    Filed: September 16, 2015
    Publication date: March 24, 2016
    Inventors: Hiroshi NISHIMOTO, Takeshi ISHIHARA
  • Publication number: 20160088520
    Abstract: According to one embodiment, an information processing device includes a first circuitry and a second circuitry. The first circuitry specifies information potential to be requested by an application and acquires the information over a network before the information is requested by the application. The second circuitry controls operation of the first circuitry based on a parameter value obtained by measuring a surrounding communication environment or an evaluation value depending on the parameter value.
    Type: Application
    Filed: September 17, 2015
    Publication date: March 24, 2016
    Inventors: Yuichiro OYAMA, Takeshi ISHIHARA, Hiroshi NISHIMOTO
  • Publication number: 20160088457
    Abstract: According to one embodiment, an information processing apparatus includes an execution controller. The execution controller acquires a communication request for requesting data communication with another communication apparatus and controls execution of the communication request by comparing an evaluation value with a threshold, the evaluation value being based on a parameter value obtained through measurement of a wireless communication environment. The execution controller changes the threshold so as to decrease or increase according to a lapse of time after acquiring the communication request.
    Type: Application
    Filed: September 16, 2015
    Publication date: March 24, 2016
    Inventors: Yuichiro OYAMA, Takeshi ISHIHARA, Hiroshi NISHIMOTO
  • Publication number: 20160080068
    Abstract: According to one embodiment, a relay device that relays communication between an information request device which requests information and an information providing device which provides requested information. The relay device includes an interface to receive a signal transmitted by the information request device. The relay device includes a first circuitry to perform, using the signal, at least one of connection management of a network, authentication of the information request device, and authentication of a user of the information request device. The relay device includes a second circuitry to control allocation of storage areas included in a storage device, or an available range within which information saved in the storage area is able to be provided, when the first circuitry detects establishment of a connection to the network, disconnection of the connection, an authentication result, or a lapse of a valid connection time period.
    Type: Application
    Filed: September 14, 2015
    Publication date: March 17, 2016
    Inventors: Takeshi ISHIHARA, Hiroshi NISHIMOTO, Kouichi TAKIMOTO
  • Publication number: 20160036615
    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 10, 2014
    Publication date: February 4, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro HASEGAWA, Hiroshi NISHIMOTO, Akihiro OKAZAKI, Masatsugu HIGASHINAKA
  • Patent number: 9244328
    Abstract: An optical modulator includes: a modulator including an optical waveguide provided in a semiconductor substrate having an electro-optical effect and an electrode to apply an electric field depending on a bias voltage and a modulation signal to the optical waveguide; a driver circuit to generate a modulation signal in accordance with an input signal; a superimposer to superimpose a reference signal on the bias voltage, the reference signal having lower frequency than the modulation signal; and a controller to control a bias voltage in a direction orthogonal to a modulation direction of the modulator based on the frequency component of the reference signal extracted from a modulated optical signal generated by the modulator.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: January 26, 2016
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventors: Hiroshi Nishimoto, Hiroshi Kuwahara
  • Publication number: 20160013963
    Abstract: A transmission apparatus that transmits a block signal including a plurality of data symbols, includes a data-symbol generation unit that generates data symbols; a fixed-symbol arrangement unit that arranges a data symbol and a fixed symbol such that the fixed symbol is inserted at a predetermined position in the block signal to generate a block symbol; an interpolation unit that performs interpolation processing on the block symbol; and a CP insertion unit that inserts a Cyclic Prefix into a signal on which the interpolation processing has been performed to generate the block signal.
    Type: Application
    Filed: March 3, 2014
    Publication date: January 14, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro HASEGAWA, Hiroshi NISHIMOTO, Masatsugu HIGASHINAKA, Akihiro OKAZAKI