Patents by Inventor Hiroyasu Sano

Hiroyasu Sano 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: 12360226
    Abstract: A wireless ranging system includes a ranging terminal that transmits a wireless signal including a ranging signal and a communication signal indicating an order of ranging with respect to a first ranging target terminal and a second ranging target terminal, and a first ranging target terminal and a second ranging target terminal that, when receiving the wireless signal, respectively transmits a first response signals and a second response signals consecutively a plurality of times to the ranging terminal. For each time the ranging terminal receives each of the plurality of response signals, the ranging terminal measures an elapsed time from transmission of the wireless signal, and calculates a relative distance between the ranging terminal and the ranging target terminals from a propagation time of each of the plurality of response signals calculated using the elapsed time.
    Type: Grant
    Filed: July 5, 2022
    Date of Patent: July 15, 2025
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shusaku Umeda, Akinori Taira, Hiroyasu Sano
  • Patent number: 12302376
    Abstract: A wireless communication device includes a transmission processing unit communicable with each of multiple communication peer devices through switching between beam directions in a time division manner, and a control unit that allows beam information representing how beams are used by the multiple communication peer devices with which the transmission processing unit is communicable to be shared by the multiple communication peer devices.
    Type: Grant
    Filed: May 16, 2022
    Date of Patent: May 13, 2025
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Fumihiro Hasegawa, Shigenori Tani, Nobuyoshi Horie, Hiroyasu Sano, Yoshihisa Kagawa
  • Publication number: 20250138136
    Abstract: A mobile station that is a position estimation device that estimates a position of the mobile station based on a plurality of distance measurement results measured between each of a plurality of fixed stations and the mobile station using wireless communication includes: a positioning calculation unit that calculates a coordinate-axial position of the mobile station for each coordinate axis using a position of the fixed stations and the distance measurement results in order from a coordinate axis having a largest coordinate-axial distance between the plurality of fixed stations; and a position estimation result generation unit that generates a position estimation result indicating a three-dimensional position of the mobile station based on a calculation result of the coordinate-axial position.
    Type: Application
    Filed: January 6, 2025
    Publication date: May 1, 2025
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyasu SANO, Shusaku UMEDA, Akira KURITA
  • Patent number: 12250057
    Abstract: A wireless relay station to be included in a ladder-type wireless relay network along a moving route of a moving object includes a relay control unit that includes station identification information in the wireless relay network assigned sequentially along the moving route to each of the wireless relay stations included in the wireless relay network and deployed along the moving route, configures and updates, using a first routing table that provides an address of a destination wireless relay station, a second routing table including the address, the station identification information, and an information update time, being associated with one another, of the destination wireless relay station, and provides control to share, among the wireless relay stations included in the wireless relay network, the second routing table configured and updated by each wireless relay station; and a relay communication unit that performs wireless relay communication with other wireless relay stations.
    Type: Grant
    Filed: July 5, 2022
    Date of Patent: March 11, 2025
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroshi Nishimoto, Yasunori Kato, Manabu Sakai, Kenichiro Kamohara, Hiroyasu Sano
  • Publication number: 20240280285
    Abstract: A communication terminal constitutes a facility control system together with a central controller controlling facilities capable of performing communication using an ultra wide band signal.
    Type: Application
    Filed: May 1, 2024
    Publication date: August 22, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shusaku UMEDA, Akinori TAIRA, Hiroyasu SANO, Akira KURITA
  • Publication number: 20240272290
    Abstract: A mobile device which is a communication device that wirelessly communicates with a fixed device fixed on a ground includes: a distance calculation unit that calculates a distance between the fixed device and the communication device based on a reception signal from the fixed device; a comparison target information acquisition unit that acquires comparison target information that is information indicating a distance between the fixed device and the communication device or an absolute position of the communication device, the information being based on a scheduled position of the communication device; and an anomaly detection unit that detects an anomaly occurring in the position of the fixed device based on whether the distance calculated by the distance calculation unit matches the comparison target information.
    Type: Application
    Filed: April 25, 2024
    Publication date: August 15, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akira KURITA, Shusaku UMEDA, Akinori TAIRA, Hiroyasu SANO
  • Publication number: 20240182092
    Abstract: A railroad management system includes: a plurality of first wireless terminals provided corresponding to a plurality of tracks, and each installed at an end of a platform of a corresponding track; a second wireless terminal installed at an end of a train, and configured to perform communication with the first wireless terminals using an ultra-wide band wireless signal; a distance estimation unit that estimates a distance between each of the plurality of first wireless terminals and the second wireless terminal using the ultra-wide band wireless signal; and a track sensing unit that senses a track that the train is entering based on an estimation result from the distance estimation unit.
    Type: Application
    Filed: February 13, 2024
    Publication date: June 6, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shusaku Umeda, Akinori Taira, Toshio Mise, Hiroyasu Sano, Akira Kurita
  • Publication number: 20240098684
    Abstract: A master device that is a fixed device belongs to any of a plurality of areas, and includes: a notification information generation unit that generates notification information including position information of a plurality of fixed devices installed in the area to which the fixed device belongs; and a communication unit that transmits a notification signal including the notification information to a mobile device at a timing different from a timing of transmission of the notification signal from another area, the mobile device being configured to estimate a position based on the notification information.
    Type: Application
    Filed: November 27, 2023
    Publication date: March 21, 2024
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shusaku UMEDA, Akinori TAIRA, Hiroyasu SANO, Mari OCHIAI
  • Publication number: 20220345201
    Abstract: A wireless relay station to be included in a ladder-type wireless relay network along a moving route of a moving object includes a relay control unit that includes station identification information in the wireless relay network assigned sequentially along the moving route to each of the wireless relay stations included in the wireless relay network and deployed along the moving route, configures and updates, using a first routing table that provides an address of a destination wireless relay station, a second routing table including the address, the station identification information, and an information update time, being associated with one another, of the destination wireless relay station, and provides control to share, among the wireless relay stations included in the wireless relay network, the second routing table configured and updated by each wireless relay station; and a relay communication unit that performs wireless relay communication with other wireless relay stations.
    Type: Application
    Filed: July 5, 2022
    Publication date: October 27, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroshi NISHIMOTO, Yasunori KATO, Manabu SAKAI, Kenichiro KAMOHARA, Hiroyasu SANO
  • Publication number: 20220342064
    Abstract: A wireless ranging system includes a ranging terminal that transmits a wireless signal including a ranging signal and a communication signal indicating an order of ranging with respect to a first ranging target terminal and a second ranging target terminal, and a first ranging target terminal and a second ranging target terminal that, when receiving the wireless signal, respectively transmits a first response signals and a second response signals consecutively a plurality of times to the ranging terminal. For each time the ranging terminal receives each of the plurality of response signals, the ranging terminal measures an elapsed time from transmission of the wireless signal, and calculates a relative distance between the ranging terminal and the ranging target terminals from a propagation time of each of the plurality of response signals calculated using the elapsed time.
    Type: Application
    Filed: July 5, 2022
    Publication date: October 27, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shusaku UMEDA, Akinori TAIRA, Hiroyasu SANO
  • Publication number: 20220279534
    Abstract: A wireless communication device includes a transmission processing unit communicable with each of multiple communication peer devices through switching between beam directions in a time division manner, and a control unit that allows beam information representing how beams are used by the multiple communication peer devices with which the transmission processing unit is communicable to be shared by the multiple communication peer devices.
    Type: Application
    Filed: May 16, 2022
    Publication date: September 1, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Fumihiro HASEGAWA, Shigenori TANI, Nobuyoshi HORIE, Hiroyasu SANO, Yoshihisa KAGAWA
  • Patent number: 11336317
    Abstract: A radio communication system according to the present invention is a radio communication system including a transmission device and a reception device, the transmission device includes a first null insertion unit that inserts a first signal that is a signal having an electric power lower than an amplitude of the data symbols, in a time direction of data symbols, and the reception device includes a null extraction unit that extracts a first symbol that is a signal in a period corresponding to the first signal, from a received signal, a signal interpolation unit that interpolates the first symbol to reproduce interference components in periods corresponding to the data symbols, and a subtraction unit that subtracts the interference components from the received signal.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: May 17, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Tomitsuka, Masatsugu Higashinaka, Hiroyasu Sano
  • Patent number: 11329859
    Abstract: A transmitter includes: a phase rotation sequence generation unit that generates, on the basis of transmit bits being input, a phase rotation sequence in which a frequency response has a bandwidth; an up-sampling unit that changes a sample rate of the phase rotation sequence and further replicates the phase rotation sequence; and a frequency shift unit that shifts, by a specified amount of shift on a frequency axis, a frequency component of the phase rotation sequence acquired from the up-sampling unit.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: May 10, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masatsugu Higashinaka, Hiroyasu Sano
  • Patent number: 11032782
    Abstract: In a wireless communication system, SINR data are obtained from power measurements data, as follows: gathering first power measurements data of total power received during communications; gathering second power measurements data of in-transmission interference power; computing third power measurements data of useful power, from the first and second power measurements data; gathering fourth power measurements data of out-transmission interference power; merging the second and fourth power measurements data so as to form a set of fifth interference power data; computing a first characteristic function from the third power measurements data, and computing a second characteristic function from the fifth power measurements data; building a third characteristic function relating to the SINR data related to the transmission channel, by performing a term-by-term product of the first and second characteristic functions; computing a probability mass function from the third characteristic function.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: June 8, 2021
    Assignees: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC R&D CENTRE EUROPE B.V
    Inventors: Nicolas Gresset, Hiroyasu Sano, Kazumasa Suzuki
  • Publication number: 20210135698
    Abstract: A radio communication system according to the present invention is a radio communication system including a transmission device and a reception device, the transmission device includes a first null insertion unit that inserts a first signal that is a signal having an electric power lower than an amplitude of the data symbols, in a time direction of data symbols, and the reception device includes a null extraction unit that extracts a first symbol that is a signal in a period corresponding to the first signal, from a received signal, a signal interpolation unit that interpolates the first symbol to reproduce interference components in periods corresponding to the data symbols, and a subtraction unit that subtracts the interference components from the received signal.
    Type: Application
    Filed: February 27, 2018
    Publication date: May 6, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Koji TOMITSUKA, Masatsugu HIGASHINAKA, Hiroyasu SANO
  • Patent number: 10938467
    Abstract: A transmitting station includes a transmitting antenna whose orientation direction is changeable, and a controller that controls the orientation direction of the transmitting antenna according to an orientation direction of the transmitting antenna determined together with receiving stations to receive data transmitted from the transmitting antenna based on estimate values of received signal quality at receiving stations that are candidates for receiving stations to receive data transmitted from the transmitting antenna. The transmitting station can maintain received signal quality at a plurality of receiving stations at a desired value or more in a data transmission system.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: March 2, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shigenori Tani, Hiroyasu Sano, Katsuyuki Motoyoshi, Akinori Fujimura, Futaba Ejima, Kyoichiro Izumi
  • Publication number: 20200403841
    Abstract: A transmitter includes: a phase rotation sequence generation unit that generates, on the basis of transmit bits being input, a phase rotation sequence in which a frequency response has a bandwidth; an up-sampling unit that changes a sample rate of the phase rotation sequence and further replicates the phase rotation sequence; and a frequency shift unit that shifts, by a specified amount of shift on a frequency axis, a frequency component of the phase rotation sequence acquired from the up-sampling unit.
    Type: Application
    Filed: February 27, 2018
    Publication date: December 24, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masatsugu HIGASHINAKA, Hiroyasu SANO
  • Publication number: 20200382168
    Abstract: A wireless communication system includes: base stations that are a plurality of transmission devices that transmits signals including different known sequences using a same frequency; and a mobile station that is a reception device that performs channel estimation using a reception signal received from at least one of the plurality of transmission devices, an average time parameter, and at least one of a plurality of the known sequences corresponding to the plurality of transmission devices, and removes an interference signal included in the reception signal using a result of the channel estimation, the average time parameter being a parameter related to channel estimation accuracy and determined based on a moving speed of a moving one of the reception device that receives the reception signal and the transmission devices that transmits the reception signal.
    Type: Application
    Filed: August 14, 2020
    Publication date: December 3, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Satoshi SASAKI, Akinori NAKAJIMA, Shinji MASUDA, Hiroyasu SANO
  • Patent number: 10812134
    Abstract: A wireless communication apparatus includes a channel-usage selection unit to select one frequency channel for each time slot from a plurality of predetermined candidate frequency channels, and a wireless communication unit to perform wireless communication by using the frequency channel selected by the channel-usage selection unit. The channel-usage selection unit selects a frequency channel that is different from a frequency channel to be used in a same time slot by an adjacent cell located at a cell interval, equal to or smaller than the predetermined first number of cells, from a cell used for the wireless communication, and allows the frequency channel selected to overlap with the frequency channel to be used in the same time slot by a remote cell located at a cell interval, greater than the first number of cells and equal to or smaller than the number of the candidate frequency channels, from a cell used for the wireless communication.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: October 20, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazumasa Suzuki, Kazuaki Ishioka, Hiroyasu Sano
  • Patent number: 10686514
    Abstract: A wireless receiving device includes a signal measurement unit; a weighting factor generation unit that generates weighting factors each for suppression of the received signals, based on measurement results of the received signals; interference suppression units that each perform, in a parallel manner, interference suppression processing on the received signals, using, one of the weighting factors; arrival detection units that are connected in one-to-one to the interference suppression units, the arrival detection units each detecting arrival of a desired signal; an arrival determination unit that determines whether the desired signal has arrived; and a demodulation processing unit that demodulates the received signals when the arrival determination unit determines that the desired signal has arrived.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: June 16, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shusaku Umeda, Kazumasa Suzuki, Hiroyasu Sano