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).
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Patent number: 11283659Abstract: 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: GrantFiled: October 28, 2020Date of Patent: March 22, 2022Assignee: Sharp Kabushiki KaishaInventors: Shimpei To, Yasuhiro Hamaguchi, Hideo Nanba, Seiichi Sampei, Hiroshi Harada, Masafumi Moriyama
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Patent number: 11013029Abstract: 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: GrantFiled: March 18, 2020Date of Patent: May 18, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Hideo Namba, Shimpei To, Yasuhiro Hamaguchi
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Publication number: 20210044466Abstract: 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: ApplicationFiled: October 28, 2020Publication date: February 11, 2021Applicant: SHARP KABUSHIKI KAISHAInventors: Shimpei TO, Yasuhiro HAMAGUCHI, Hideo NANBA, Seiichi SAMPEI, Hiroshi HARADA, Masafumi MORIYAMA
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Patent number: 10833903Abstract: 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: GrantFiled: June 22, 2016Date of Patent: November 10, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Shimpei To, Yasuhiro Hamaguchi, Hideo Nanba, Seiichi Sampei, Hiroshi Harada, Masafumi Moriyama
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Publication number: 20200221491Abstract: 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: ApplicationFiled: March 18, 2020Publication date: July 9, 2020Applicant: SHARP KABUSHIKI KAISHAInventors: HIDEO NAMBA, SHIMPEI TO, YASUHIRO HAMAGUCHI
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Patent number: 10602539Abstract: 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: GrantFiled: June 30, 2014Date of Patent: March 24, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Hideo Namba, Shimpei To, Yasuhiro Hamaguchi
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Patent number: 10477548Abstract: 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: GrantFiled: April 4, 2017Date of Patent: November 12, 2019Assignee: SHARP KABUSHIKI KAISHAInventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Minoru Kubota, Hideo Namba, Seiichi Sampei, Shinichi Miyamoto, Shinsuke Ibi
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Patent number: 10374851Abstract: 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: GrantFiled: June 8, 2017Date of Patent: August 6, 2019Assignee: SHARP KABUSHIKI KAISHAInventors: Shimpei To, Minoru Kubota, Yasuhiro Hamaguchi, Hideo Namba, Kazunari Yokomakura
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Patent number: 10122505Abstract: 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: GrantFiled: April 28, 2009Date of Patent: November 6, 2018Assignee: SHARP KABUSHIKI KAISHAInventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Osamu Nakamura
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Publication number: 20170272289Abstract: 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: ApplicationFiled: June 8, 2017Publication date: September 21, 2017Applicant: SHARP KABUSHIKI KAISHAInventors: Shimpei TO, Minoru KUBOTA, Yasuhiro HAMAGUCHI, Hideo NAMBA, Kazunari YOKOMAKURA
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Publication number: 20170245277Abstract: 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: ApplicationFiled: April 4, 2017Publication date: August 24, 2017Applicant: SHARP KABUSHIKI KAISHAInventors: Kazunari YOKOMAKURA, Yasuhiro HAMAGUCHI, Shimpei TO, Minoru KUBOTA, Hideo NAMBA, Seiichi SAMPEI, Shinichi MIYAMOTO, Shinsuke IBI
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Patent number: 9680676Abstract: 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: GrantFiled: June 6, 2014Date of Patent: June 13, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Shimpei To, Minoru Kubota, Yasuhiro Hamaguchi, Hideo Namba, Kazunari Yokomakura
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Patent number: 9629154Abstract: 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: GrantFiled: February 16, 2016Date of Patent: April 18, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Minoru Kubota, Hideo Namba, Seiichi Sampei, Shinichi Miyamoto, Shinsuke Ibi
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Publication number: 20160301553Abstract: 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: ApplicationFiled: June 22, 2016Publication date: October 13, 2016Applicant: SHARP KABUSHIKI KAISHAInventors: Shimpei TO, Yasuhiro HAMAGUCHI, Hideo NANBA, Seiichi SAMPEI, Hiroshi HARADA, Masafumi MORIYAMA
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Publication number: 20160165603Abstract: 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: ApplicationFiled: February 16, 2016Publication date: June 9, 2016Applicant: SHARP KABUSHIKI KAISHAInventors: Kazunari YOKOMAKURA, Yasuhiro HAMAGUCHI, Shimpei TO, Minoru KUBOTA, Hideo NAMBA, Seiichi SAMPEI, Shinichi MIYAMOTO, Shinsuke IBI
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Patent number: 9301298Abstract: 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: GrantFiled: March 6, 2014Date of Patent: March 29, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Shimpei To, Minoru Kubota, Hideo Namba, Seiichi Sampei, Shinichi Miyamoto, Shinsuke Ibi
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Patent number: 9220108Abstract: 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: GrantFiled: June 13, 2014Date of Patent: December 22, 2015Assignee: SHARP KABUSHIKI KAISHAInventors: Shimpei To, Yasuhiro Hamaguchi, Hideo Namba, Minoru Kubota
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Patent number: 9209874Abstract: 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: GrantFiled: October 24, 2011Date of Patent: December 8, 2015Assignee: Sharp Kabushiki KaishaInventors: Takashi Onodera, Hiromichi Tomeba, Shimpei To, Hiroshi Nakano, Alvaro Ruiz Delgado, Minoru Kubota
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Patent number: 9185577Abstract: 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: GrantFiled: May 13, 2011Date of Patent: November 10, 2015Assignee: SHARP KABUSHIKI KAISHAInventors: Hiromichi Tomeba, Minoru Kubota, Takashi Onodera, Shimpei To, Kozue Hirata, Hiroshi Nakano
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Patent number: 9178587Abstract: 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: GrantFiled: January 31, 2011Date of Patent: November 3, 2015Assignee: SHARP KABUSHIKI KAISHAInventors: Hiroshi Nakano, Shimpei To, Takashi Onodera, Kozue Hirata, Hiromichi Tomeba