Patents by Inventor Shimpei To

Shimpei To 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: 11283659
    Abstract: An apparatus generating a packet of signals, a number of preamble signals of a preamble portion for each of a number of radio transmission units, and a number of data signals of a data portion, wherein a phase rotation in frequency domain is equal to a time shift in time domain is applied to each symbol of the number of preamble signals separately, the same phase rotation is applied to each symbol separately, the amount of the phase rotation is different for each preamble signal and each data signal, the amount of the phase rotation of one of the number of data signals and one of the number of preamble signals is both zero, and the amount of the phase rotation is equal between one of the preamble signals and one of the data signals for the same radio transmission unit.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: March 22, 2022
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shimpei To, Yasuhiro Hamaguchi, Hideo Nanba, Seiichi Sampei, Hiroshi Harada, Masafumi Moriyama
  • Patent number: 11013029
    Abstract: A communication means which allocates a terminal identifier to a destination communication apparatus and carries out communication with the destination communication apparatus by use of a plurality of functions including an identifier generation section 152 for generating different terminal identifiers corresponding to a function used and an identifier allocation section 114 having an identifier selecting section 104 for allocation to the destination communication apparatus. Using a plurality of different terminal identifiers (terminal function identifiers), a function to be used between the destination can be specified. Moreover, it is possible to optimize the size of a memory for storing information required for adaptive modulation control.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: May 18, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hideo Namba, Shimpei To, Yasuhiro Hamaguchi
  • Publication number: 20210044466
    Abstract: An apparatus generating a packet of signals, a number of preamble signals of a preamble portion for each of a number of radio transmission units, and a number of data signals of a data portion, wherein a phase rotation in frequency domain is equal to a time shift in time domain is applied to each symbol of the number of preamble signals separately, the same phase rotation is applied to each symbol separately, the amount of the phase rotation is different for each preamble signal and each data signal, the amount of the phase rotation of one of the number of data signals and one of the number of preamble signals is both zero, and the amount of the phase rotation is equal between one of the preamble signals and one of the data signals for the same radio transmission unit.
    Type: Application
    Filed: October 28, 2020
    Publication date: February 11, 2021
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shimpei TO, Yasuhiro HAMAGUCHI, Hideo NANBA, Seiichi SAMPEI, Hiroshi HARADA, Masafumi MORIYAMA
  • Patent number: 10833903
    Abstract: An apparatus generating a packet of signals, a number of preamble signals of a preamble portion for each of a number of radio transmission units, and a number of data signals of a data portion, wherein a phase rotation in frequency domain is equal to a time shift in time domain is applied to each symbol of the number of preamble signals separately, the same phase rotation is applied to each symbol separately, the amount of the phase rotation is different for each preamble signal and each data signal, the amount of the phase rotation of one of the number of data signals and one of the number of preamble signals is both zero, and the amount of the phase rotation is equal between one of the preamble signals and one of the data signals for the same radio transmission unit.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: November 10, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shimpei To, Yasuhiro Hamaguchi, Hideo Nanba, Seiichi Sampei, Hiroshi Harada, Masafumi Moriyama
  • Publication number: 20200221491
    Abstract: A communication means which allocates a terminal identifier to a destination communication apparatus and carries out communication with the destination communication apparatus by use of a plurality of functions including an identifier generation section 152 for generating different terminal identifiers corresponding to a function used and an identifier allocation section 114 having an identifier selecting section 104 for allocation to the destination communication apparatus. Using a plurality of different terminal identifiers (terminal function identifiers), a function to be used between the destination can be specified. Moreover, it is possible to optimize the size of a memory for storing information required for adaptive modulation control.
    Type: Application
    Filed: March 18, 2020
    Publication date: July 9, 2020
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: HIDEO NAMBA, SHIMPEI TO, YASUHIRO HAMAGUCHI
  • Patent number: 10602539
    Abstract: A communication means which allocates a terminal identifier to a destination communication apparatus and carries out communication with the destination communication apparatus by use of a plurality of functions including an identifier generation section 152 for generating different terminal identifiers corresponding to a function used and an identifier allocation section 114 having an identifier selecting section 104 for allocation to the destination communication apparatus. Using a plurality of different terminal identifiers (terminal function identifiers), a function to be used between the destination can be specified. Moreover, it is possible to optimize the size of a memory for storing information required for adaptive modulation control.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: March 24, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hideo Namba, Shimpei To, Yasuhiro Hamaguchi
  • Patent number: 10477548
    Abstract: A communication device comprising at least a receiver and a demodulator. The receiver receives first receiving signals and second receiving signals, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame. The demodulator configured to detect the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being demodulates the first receiving signals.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: November 12, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Minoru Kubota, Hideo Namba, Seiichi Sampei, Shinichi Miyamoto, Shinsuke Ibi
  • Patent number: 10374851
    Abstract: A communication device receives a reception signal including at least a first reception signal and a second reception signal, where the first reception signal is a signal to be transmitted using a first set of subcarriers and the second reception signal is a signal to be transmitted using a second set of subcarriers which overlaps with at least one end of the first set of subcarriers in a time frame. The communication device also demodulates information indicating data included in the first reception signal after reducing the second reception signal transmitted by using one or more overlapping subcarriers of the second set of subcarriers from the reception signal.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: August 6, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shimpei To, Minoru Kubota, Yasuhiro Hamaguchi, Hideo Namba, Kazunari Yokomakura
  • Patent number: 10122505
    Abstract: A wireless communication system includes a first communication device which arranges a frequency signal into which a single carrier signal is converted by time-to-frequency conversion in subcarriers and wirelessly transmits a resultant signal and a second communication device which receives the signal wirelessly transmitted by the first communication device.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: November 6, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Osamu Nakamura
  • Publication number: 20170272289
    Abstract: A communication device receives a reception signal including at least a first reception signal and a second reception signal, where the first reception signal is a signal to be transmitted using a first set of subcarriers and the second reception signal is a signal to be transmitted using a second set of subcarriers which overlaps with at least one end of the first set of subcarriers in a time frame. The communication device also demodulates information indicating data included in the first reception signal after reducing the second reception signal transmitted by using one or more overlapping subcarriers of the second set of subcarriers from the reception signal.
    Type: Application
    Filed: June 8, 2017
    Publication date: September 21, 2017
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shimpei TO, Minoru KUBOTA, Yasuhiro HAMAGUCHI, Hideo NAMBA, Kazunari YOKOMAKURA
  • Publication number: 20170245277
    Abstract: A communication device comprising at least a receiver and a demodulator. The receiver receives first receiving signals and second receiving signals, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame. The demodulator configured to detect the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being demodulates the first receiving signals.
    Type: Application
    Filed: April 4, 2017
    Publication date: August 24, 2017
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazunari YOKOMAKURA, Yasuhiro HAMAGUCHI, Shimpei TO, Minoru KUBOTA, Hideo NAMBA, Seiichi SAMPEI, Shinichi MIYAMOTO, Shinsuke IBI
  • Patent number: 9680676
    Abstract: A communication device receives a reception signal including at least a first reception signal and a second reception signal, where the first reception signal is a signal to be transmitted using a first set of subcarriers and the second reception signal is a signal to be transmitted using a second set of subcarriers which overlaps with at least one end of the first set of subcarriers in a time frame. The communication device also demodulates information indicating data included in the first reception signal after reducing the second reception signal transmitted by using one or more overlapping subcarriers of the second set of subcarriers from the reception signal.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: June 13, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shimpei To, Minoru Kubota, Yasuhiro Hamaguchi, Hideo Namba, Kazunari Yokomakura
  • Patent number: 9629154
    Abstract: A communication device comprising at least a receiver and a demodulator. The receiver receives first receiving signals and second receiving signals, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame. The demodulator configured to detect the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being demodulates the first receiving signals.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: April 18, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Minoru Kubota, Hideo Namba, Seiichi Sampei, Shinichi Miyamoto, Shinsuke Ibi
  • Publication number: 20160301553
    Abstract: An apparatus generating a packet of signals, a number of preamble signals of a preamble portion for each of a number of radio transmission units, and a number of data signals of a data portion, wherein a phase rotation in frequency domain is equal to a time shift in time domain is applied to each symbol of the number of preamble signals separately, the same phase rotation is applied to each symbol separately, the amount of the phase rotation is different for each preamble signal and each data signal, the amount of the phase rotation of one of the number of data signals and one of the number of preamble signals is both zero, and the amount of the phase rotation is equal between one of the preamble signals and one of the data signals for the same radio transmission unit.
    Type: Application
    Filed: June 22, 2016
    Publication date: October 13, 2016
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shimpei TO, Yasuhiro HAMAGUCHI, Hideo NANBA, Seiichi SAMPEI, Hiroshi HARADA, Masafumi MORIYAMA
  • Publication number: 20160165603
    Abstract: A communication device comprising at least a receiver and a demodulator. The receiver receives first receiving signals and second receiving signals, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame. The demodulator configured to detect the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being demodulates the first receiving signals.
    Type: Application
    Filed: February 16, 2016
    Publication date: June 9, 2016
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazunari YOKOMAKURA, Yasuhiro HAMAGUCHI, Shimpei TO, Minoru KUBOTA, Hideo NAMBA, Seiichi SAMPEI, Shinichi MIYAMOTO, Shinsuke IBI
  • Patent number: 9301298
    Abstract: A communication device comprising a transmission unit and a reception unit. The transmission unit is configured to transmit, to a first communication device, first information indicating a first set of subcarriers comprising of a plurality of subcarriers, and to a second communication device, second information indicating a second set of subcarriers comprising of a plurality of subcarriers. The reception unit is configured to receive a first Discrete Fourier Transform-spread-OFDM (DFT-S-OFDM) signal from the first communication device using the first information and a second Discrete Fourier Transform-spread-OFDM (DFT-S-OFDM) signal from the second communication device using the second information. Also, in the communication device, a portion of the second set of subcarriers can overlap with at least a portion of the first set of subcarriers in a time frame of a plurality of time frames.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: March 29, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Minoru Kubota, Hideo Namba, Seiichi Sampei, Shinichi Miyamoto, Shinsuke Ibi
  • Patent number: 9220108
    Abstract: A communication terminal performing Fourier transform to convert a first time-domain signal into frequency-domain signals, allocating the frequency-domain signals to one or more first block is composed of two or more contiguous subcarriers as a first allocation unit, performing inverse Fourier transform to convert the allocated frequency-domain signals into a second time-domain signal, and transmitting, to a BS, the second time-domain signal simultaneously with another communication terminal, in case that the other communication apparatus performs communication with the BS using one or more second block composed of two or more contiguous subcarriers as a second allocation unit wherein the second block, wherein the number of subcarriers of the second block is equal to a value of x multiplied by the number of subcarriers of the first block, and x is equal to a value of 2 or a value greater than 2.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: December 22, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shimpei To, Yasuhiro Hamaguchi, Hideo Namba, Minoru Kubota
  • Patent number: 9209874
    Abstract: The present invention switches an interference suppression system between a linear precoding and a nonlinear precoding in accordance with a communication environment. A wireless transmission apparatus is provided with a plurality of transmission antenna units (303), and multiplexes spatially and transmits a plurality of series of data with respect to at least one wireless reception apparatus, and includes a selection unit (307) configured to select any one precoding system from a plurality of types of precoding systems and a precoding unit (315) configured to carry out precoding with respect to the plurality of series of data using the selected precoding system. In addition, the selection unit selects either of a first precoding system carrying out linear processing with respect to the plurality of series of data or a second precoding system carrying out nonlinear processing with respect to the plurality of series of data.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: December 8, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Onodera, Hiromichi Tomeba, Shimpei To, Hiroshi Nakano, Alvaro Ruiz Delgado, Minoru Kubota
  • Patent number: 9185577
    Abstract: To realize transmission performances equivalent to those of an MU-MIMO BLAST ZF-THP system without increasing a signal processing amount in a base station apparatus in a downlink MU-MIMO transmission system. A transmission apparatus is provided with a plurality of transmission antennas, generates a transmission signal addressed to each reception apparatus based on information indicating spatial correlation of channels to and from a plurality of reception apparatuses, space-multiplexes the generated each transmission signal in the same wireless resource, and transmits it to each reception apparatus.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: November 10, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hiromichi Tomeba, Minoru Kubota, Takashi Onodera, Shimpei To, Kozue Hirata, Hiroshi Nakano
  • Patent number: 9178587
    Abstract: The disclosed is a transmission device including a plurality of transmission antennas for transmitting signals in the same channel at the same time point to a plurality of reception devices, characterized by including: a dedicated reference signal generator configured to generate dedicated reference signals for the respective reception devices; a data signal generator configured to generate data signals for the respective reception devices; a spatial multiplexer configured to spatially multiplex at least some of the dedicated reference signals and at least some of the data signals; and a transmitter configured to transmit the spatially multiplexed signals.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: November 3, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Nakano, Shimpei To, Takashi Onodera, Kozue Hirata, Hiromichi Tomeba