Patents by Inventor Hiromasa Fujii

Hiromasa Fujii 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: 10679794
    Abstract: A plurality of first and second capacitor parts and second capacitor parts are formed on opposed main surfaces of a foil shaped conductive substrate to sandwich the conductive substrate. The first and second capacitor parts are respectively coated with insulative protection layers. Terminal electrodes are respectively formed on main surfaces of the protection layers. The terminal electrodes and conductive parts of the first and second capacitor parts are respectively electrically connected via first via conductors and the terminal electrodes and the conductive substrate 1 are electrically connected to second via conductors.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: June 9, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Yasuo Fujii, Hiromasa Saeki
  • Patent number: 9042900
    Abstract: A CRS base station (21) includes a transmitting section configured to transmit a synchronization establishment signal, a receiving section configured to receive a random access signal corresponding to the synchronization establishment signal, a determining section configured to determine whether or not the random access signal received by the receiving section has been transmitted from an MCS terminal (12) and an interference reduction processing section configured to perform interference reduction processing on the MCS terminal (12) when the determining section determines that the random access signal has been transmitted from the MCS terminal (12).
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: May 26, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiromasa Fujii, Hiroto Yasuda, Hiroki Harada, Shunji Miura, Hidetoshi Kayama
  • Patent number: 9031009
    Abstract: The present invention provide a transmitting/receiving device that includes a sensing period information setting part for, in an interfering system that shares at least a part of a frequency band with an interfered system, setting sensing period information that shows a sensing period for a signal using a shared frequency band; and a transmission prohibition period information notifying part for notifying a terminal in the interfering system of transmission prohibition period information for prohibiting transmission processing in the interfering system until an end of the sensing period, a maximum transmission period for one transmission by the terminal in the interfering system prior to a start point of the sensing period.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: May 12, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiromasa Fujii, Takahiro Asai, Tomoyuki Ohya
  • Patent number: 8948068
    Abstract: A wireless station in a second communication system, with at least a portion of a first frequency band used in a first communication system and a portion of a second frequency band used in the second communication system being shared or neighboring, the wireless station including a waveform characteristic quantity extracting unit that extracts a waveform characteristic quantity which shows a statistical characteristic of a signal received from the first communication system; a communication parameter determining unit that determines communication parameters to be used for the wireless station in the second communication system depending on a determination result of whether the extracted waveform characteristic quantity is of a predetermined waveform characteristic quantity for reducing an interference; and a transmission and reception unit that transmits and receives a wireless communication signal in the second communication system in accordance with the determined communication parameters.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: February 3, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Hiromasa Fujii, Shunji Miura, Hidetoshi Kayama
  • Patent number: 8903404
    Abstract: A CRS base station (21) includes a transmitting section configured to transmit a synchronization establishment signal, a receiving section configured to receive a random access signal corresponding to the synchronization establishment signal, a determining section configured to determine whether or not the random access signal received by the receiving section has been transmitted from an MCS terminal (12) and an interference reduction processing section configured to perform interference reduction processing on the MCS terminal (12) when the determining section determines that the random access signal has been transmitted from the MCS terminal (12).
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: December 2, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiromasa Fujii, Hiroto Yasuda, Hiroki Harada, Shunji Miura, Hidetoshi Kayama
  • Publication number: 20140221030
    Abstract: A CRS base station (21) includes a transmitting section configured to transmit a synchronization establishment signal, a receiving section configured to receive a random access signal corresponding to the synchronization establishment signal, a determining section configured to determine whether or not the random access signal received by the receiving section has been transmitted from an MCS terminal (12) and an interference reduction processing section configured to perform interference reduction processing on the MCS terminal (12) when the determining section determines that the random access signal has been transmitted from the MCS terminal (12).
    Type: Application
    Filed: April 11, 2014
    Publication date: August 7, 2014
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiromasa Fujii, Hiroto Yasuda, Hiroki Harada, Shunji Miura, Hidetoshi Kayama
  • Patent number: 8706045
    Abstract: A signal detection apparatus includes: a unit configured to select a particular detection target signal from among plural candidates of detection target signals; a unit configured to calculate a cyclic autocorrelation value at a center coordinate point specified by at least a cyclic parameter and a shift parameter of the particular detection target signal; a unit configured to calculate a cyclic autocorrelation value of each of (L?1) coordinate points belonging to a common area that is used commonly for different detection target signals; a unit configured to calculate a test statistic of the particular detection target signal; and a unit configured to determine presence or absence of the particular detection target signal according to a comparison result between the test statistic and a threshold, wherein the test statistic is calculated by using the cyclic autocorrelation value in each of the (L?1) coordinate points belonging to the common area.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: April 22, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroki Harada, Hiromasa Fujii, Shunji Miura
  • Patent number: 8700078
    Abstract: The invention has a step where a transmitting station in a second radio communication system determines whether transmission of a second radio communication system signal using a shared frequency band is possible or not based on load information of a first radio communication system broadcast from a base station in the first radio communication system, a step where the transmitting station in the second radio communication system calculates predicted interference power caused in a receiving station in the first radio communication system by the second radio communication system signal transmitted using the shared frequency band, and a step where the base station in the first radio communication system increases an allowable interference level of a first radio communication system signal transmitted using the shared frequency band based on the predicted interference power broadcast from the transmitting station in the second radio communication system.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: April 15, 2014
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroki Harada, Hiromasa Fujii, Takahiro Asai, Tomoyuki Ohya
  • Patent number: 8675065
    Abstract: A video monitoring system, comprises a camera, and a monitor apparatus, to which video data from the camera is transmitted, wherein the camera comprises a video obtaining unit for obtaining a signal from an image pickup device, a camera image recognizer unit for executing video processing upon an input video obtained from the video obtaining unit, an encoding unit for executing an encoding process upon basis of a result of the processing within the camera image recognizer unit, thereby producing the video data, and wherein the monitor apparatus comprises a decoding unit for decoding the video data, and an image recognizer unit for selecting a decoding means of the decoding unit, upon basis of the result of processing of the camera image recognizer unit.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: March 18, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Masaya Itoh, Masanori Miyoshi, Masato Kazui, Hiromasa Fujii
  • Patent number: 8619885
    Abstract: The second radio communication system selects one or more of the sub-carriers S21 to be used in accordance with a condition of the sub-carriers S11. The second radio communication system transmits a radio signal by using the sub-carriers S21 selected. In the selection of sub-carrier, the sub-carrier S21 located between the plurality of sub-carriers S11 radiated in the frequency band BW2.
    Type: Grant
    Filed: May 25, 2009
    Date of Patent: December 31, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiromasa Fujii, Hitoshi Yoshino
  • Patent number: 8571573
    Abstract: A radio communication apparatus includes: a receiving unit configured to receive a cognitive signal including system information of each of a plurality of systems; a metric unit configured to prepare metric information indicating relationship degree between the radio communication apparatus and a communication system to which the radio communication apparatus does not belong; a condition determination unit configured to determine whether a restriction should be imposed on transmission by the radio communication apparatus based on the system information and the metric information; and a transmission unit configured to transmit a signal using predetermined radio resources when transmission by the radio communication apparatus is not prohibited.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: October 29, 2013
    Assignee: NTT Docomo, Inc.
    Inventors: Hiromasa Fujii, Hitoshi Yoshino
  • Patent number: 8542758
    Abstract: Disclosed is a signal generation device that employs a transmission method using inverse Fourier transform. The signal generation device includes: a modulation unit which modulates transmission data to obtain modulation data; a serial-parallel conversion unit which converts the modulation data input in series to parallel data of a predetermined size smaller than the size of inverse Fourier transform; a duplication unit which selects and duplicates all or a portion of the parallel data to obtain duplication data; a first time-axis shift unit which shifts the duplication data along the time axis to obtain time-axis shift data; and an inverse Fourier transform unit which carries out inverse Fourier transform on the parallel data obtained by the serial-parallel conversion unit and the time-axis shift data obtained by the first time-axis shift unit.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: September 24, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroki Harada, Hiromasa Fujii, Shunji Miura, Tomoyuki Ohya
  • Patent number: 8521174
    Abstract: When a frequency band is shared between a large cell system having a large cell base station and a small cell system having a small cell base station, the large cell base station dynamically controls dedicated resources for the large cell base station and shared resources for both the large cell base station and the small cell base station based on predetermined information, broadcasts allocation information of dedicated resources for the large cell base station and shared resources for both the large cell base station and the small cell base station, to the small cell base station belonging to the own cell, and the small cell base station belongs to at least one large cell base station and determines resource assignment in the own cell based on the resource allocation information broadcast from the large cell base station.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: August 27, 2013
    Assignee: NTT DOCOMO, Inc.
    Inventors: Hiromasa Fujii, Hiroto Yasuda, Hiroki Harada, Shunji Miura, Tomoyuki Ohya
  • Patent number: 8503944
    Abstract: A signal detection apparatus 23 for determining whether a detection target signal is included in a received radio signal, includes: a waveform feature amount calculation unit 31 configured to calculate a waveform feature amount Rx? representing a waveform feature; a test statistic calculation unit 32 configured to calculate test statistic Zx? of each detection target signal by using the waveform feature amount; and a signal decision unit 33 configured to determine presence or absence of each detection target signal by comparing the test statistic Zx? of each detection target signal with a threshold ?, wherein, under a condition where a specific detection target signal is removed, the test statistic calculation unit calculates a test statistic for a detection target signal which is not removed, and the signal decision unit determines presence or absence of the detection target signal by comparing the calculated test statistic with the threshold.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: August 6, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroki Harada, Hiromasa Fujii, Shunji Miura, Tomoyuki Ohya
  • Patent number: 8483038
    Abstract: The present invention is to provide a communication channel with a low inter-cell interference while suppressing variation in the amount of inter-cell interference. Provided is a base station arranged in a radio communication system configured to implement a frequency division multiple access method by using a frequency division multiplexing method as a modulation method, and configured of cells each divided into an inner region and an outer region. The base station includes an allocation controller configured to perform subchannelization using a perfectly-orthogonal channel in the outer region of the cell, and to perform subchannelization using a quasi-orthogonal channel in the inner region of the cell.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: July 9, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiromasa Fujii, Hitoshi Yoshino, Junichiro Hagiwara
  • Patent number: 8396498
    Abstract: The invention has a step where a transmitting station in a second radio communication system determines whether transmission of a second radio communication system signal using a shared frequency band is possible or not based on load information of a first radio communication system broadcast from a base station in the first radio communication system, a step where the transmitting station in the second radio communication system calculates predicted interference power caused in a receiving station in the first radio communication system by the second radio communication system signal transmitted using the shared frequency band, and a step where the base station in the first radio communication system increases an allowable interference level of a first radio communication system signal transmitted using the shared frequency band based on the predicted interference power broadcast from the transmitting station in the second radio communication system.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: March 12, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiroki Harada, Hiromasa Fujii, Takahiro Asai, Tomoyuki Ohya
  • Patent number: 8306133
    Abstract: A transmitter which transmits information in transmission frame to a receiver, the transmission frame including multiple transmission symbols and guard intervals obtained by replicating a fixed time period of a transmission symbol, generates a transmission frame by making phases of one transmission symbol out of two transmission symbols and a guard interval thereof continuous with phases of the other transmission symbol and a guard interval thereof, when the two continuous transmission symbols are the same.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: November 6, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hirohito Suda, Hiromasa Fujii
  • Patent number: 8294765
    Abstract: This is a video image monitoring system which can effectively detect a mobile object appearing in a captured video image even if a background image and other camera condition change continuously. The video image monitoring system comprises: a video-image-capturing section 100 for putting out image data based on a video image signal obtained by using a camera 10; a mobile-object-candidate-area-detecting section 101 for extracting a candidate area of a mobile object from the image data; and a mobile-object-detecting section 102 for determining whether the candidate area is the mobile object. The mobile-object-candidate-area-detecting section 101 quantizes a brightness gradient direction of the image data, and calculates a spatio-temporal histogram which represents the frequency of a direction code appearing in a predetermined spatio-temporal space. After that, the mobile-object-candidate-area-detecting section 101 calculates a statistical spatio-temporal space evaluation value of the spatio-temporal histogram.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: October 23, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Masaya Itoh, Masanori Miyoshi, Masato Kazui, Hiromasa Fujii, Shun'ichi Kaneko, Hidenori Takauji
  • Patent number: 8295226
    Abstract: A disclosed radio communication apparatus includes an intermediate band detecting unit detecting an intermediate band which is a band between a first frequency band and a second frequency band which are allocated to a same mobile communication system or different mobile communication systems, a use status detecting unit detecting an uplink/downlink multiplexing method used in each of the first frequency band and the second frequency band, and a determination unit determining, based on the intermediate band and the uplink/downlink multiplexing method, the uplink/downlink multiplexing method usable in the intermediate band and a guard band in which use of frequencies are prevented, the guard band being included in the intermediate band.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: October 23, 2012
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hiromasa Fujii, Hitoshi Yoshino
  • Publication number: 20120213102
    Abstract: A wireless station in a second communication system, with at least a portion of a first frequency band used in a first communication system and a portion of a second frequency band used in the second communication system being shared or neighboring, the wireless station including a waveform characteristic quantity extracting unit that extracts a waveform characteristic quantity which shows a statistical characteristic of a signal received from the first communication system; a communication parameter determining unit that determines communication parameters to be used for the wireless station in the second communication system depending on a determination result of whether the extracted waveform characteristic quantity is of a predetermined waveform characteristic quantity for reducing an interference; and a transmission and reception unit that transmits and receives a wireless communication signal in the second communication system in accordance with the determined communication parameters.
    Type: Application
    Filed: January 13, 2012
    Publication date: August 23, 2012
    Applicant: NTT DOCOMO, INC.
    Inventors: Hiroki Harada, Hiromasa Fujii, Shunji Miura, Hidetoshi Kayama