Patents by Inventor Shinsuke Ibi

Shinsuke Ibi 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: 10660126
    Abstract: Provided is a communication device, even in a case that many communication devices are connected in a radio communication network constituted of a plurality of different radio communication technologies, that suppresses data transmission of one communication technology from delaying due to data transmission situation of another communication device and enables coexistence of different radio communication technologies.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: May 19, 2020
    Assignees: SHARP KABUSHIKI KAISHA, OSAKA UNIVERSITY
    Inventors: Takashi Yoshimoto, Jungo Goto, Osamu Nakamura, Yasuhiro Hamaguchi, Seiichi Sampei, Shinsuke Ibi
  • Publication number: 20200052823
    Abstract: A terminal apparatus for performing radio communication with another terminal apparatus via a base station apparatus, the terminal apparatus including: a transmitter configured to transmit, to the base station apparatus, a signal of data addressed to the other terminal apparatus; a receiver configured to receive a signal from the base station apparatus to the other terminal apparatus; and a controller configured to determine whether the base station apparatus has successfully received the signal of the data transmitted from the transmitter to the other terminal apparatus, by using the signal from the base station apparatus to the other terminal apparatus received by the receiver.
    Type: Application
    Filed: March 28, 2018
    Publication date: February 13, 2020
    Inventors: JUNGO GOTO, OSAMU NAKAMURA, SEIICHI SAMPEI, SHINSUKE IBI
  • 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
  • Publication number: 20190045540
    Abstract: Provided is a communication device, even in a case that many communication devices are connected in a radio communication network constituted of a plurality of different radio communication technologies, that suppresses data transmission of one communication technology from delaying due to data transmission situation of another communication device and enables coexistence of different radio communication technologies.
    Type: Application
    Filed: January 31, 2017
    Publication date: February 7, 2019
    Inventors: TAKASHI YOSHIMOTO, JUNGO GOTO, OSAMU NAKAMURA, YASUHIRO HAMAGUCHI, SEIICHI SAMPEI, SHINSUKE IBI
  • Publication number: 20180343688
    Abstract: In a wireless communication system that includes a first access point and a guard terminal, the guard terminal transmits a signal for a reservation of a transmission medium after receiving a reservation medium signal transmitted from the first access point and the guard terminal transmits a signal for a reservation of the transmission medium after receiving a reservation medium signal transmitted from a second access point that is different from the first access point.
    Type: Application
    Filed: February 23, 2016
    Publication date: November 29, 2018
    Inventors: Osamu NAKAMURA, Jungo GOTO, Yasuhiro HAMAGUCHI, Shinichi MIYAMOTO, Seiichi SAMPEI, Shinsuke IBI
  • 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: 9680602
    Abstract: A bit coding device that creates a coded bit sequence by performing error correction coding on an input bit sequence that is input, includes a coding unit that creates a first bit sequence by performing the error correction coding on the input bit sequence, an extraction unit that extracts a second bit sequence from the first bit sequence, and an information compression unit that creates a third bit sequence by performing lossy compression on the second bit sequence, in which coded bits include at least a portion of the third bit sequence.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: June 13, 2017
    Assignees: SHARP KABUSHIKI KAISHA, OSAKA UNIVERSITY
    Inventors: Jungo Goto, Hiroki Takahashi, Osamu Nakamura, Kazunari Yokomakura, Yasuhiro Hamaguchi, Shinsuke Ibi, Seiichi Sampei, Shinichi Miyamoto
  • 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: 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
  • Publication number: 20160021663
    Abstract: According to one aspect of the present invention, there is provided a wireless communication device that transmits a first wireless signal representing a bit sequence to a reception device, in which the first wireless signal is transmitted concurrently with a second wireless signal representing the bit sequence described above, and in which between the first wireless signal and the second wireless signal, components with a prescribed ratio are mapped to a different frequency or to a different time between the first wireless signal and the second wireless signal and remaining components are mapped to the same frequency and to the same time between the first wireless signal and the second wireless signal.
    Type: Application
    Filed: March 4, 2014
    Publication date: January 21, 2016
    Applicants: OSAKA UNIVERSITY, SHARP KABUSHIKI KAISHA
    Inventors: Hiroki TAKAHASHI, Jungo GOTO, Osamu NAKAMURA, Kazunari YOKOMAKURA, Yasuhiro HAMAGUCHI, Seiichi SAMPEI, Shinichi MIYAMOTO, Shinsuke IBI
  • Publication number: 20160013952
    Abstract: A reception unit for receiving a signal representing a bit sequence, a channel estimation unit for estimating channel variation that the received signal undergoes and calculating a channel estimation value representing the channel variation, and a demodulation unit for demodulating the signal by using the channel estimation value and restoring each bit included in the bit sequence represented by the received signal are included, and the demodulation unit performs demodulation of the received signal by using a value indicating magnitude of error included in the channel estimation value.
    Type: Application
    Filed: February 19, 2014
    Publication date: January 14, 2016
    Applicants: OSAKA UNIVERSITY, SHARP KABUSHIKI KAISHA
    Inventors: Osamu NAKAMURA, Hiroki TAKAHASHI, Jungo GOTO, Kazunari YOKOMAKURA, Yasuhiro HAMAGUCHI, Shinsuke IBI, Seiichi SAMPEI, Shinichi MIYAMOTO
  • Patent number: 9191080
    Abstract: A reception device comprises a reception unit for receiving signals transmitted by assigning respectively a plurality of different frequency signal groups, which are generated based on a same bit sequence, to a plurality of layers, an MIMO separation unit for executing MIMO separation of the signals, received by the reception unit, into the frequency signal groups corresponding respectively to the plural layers, and a merging unit for merging individual items of information based on the frequency signal groups obtained by the MIMO separation, the items of information corresponding respectively to the plural layers.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: November 17, 2015
    Assignees: SHARP KABUSHIKI KAISHA, OSAKA UNIVERSITY
    Inventors: Kazunari Yokomakura, Osamu Nakamura, Jungo Goto, Yasuhiro Hamaguchi, Hiroki Takahashi, Seiichi Sampei, Shinsuke Ibi, Shinichi Miyamoto
  • Publication number: 20150244496
    Abstract: A bit coding device that creates a coded bit sequence by performing error correction coding on an input bit sequence that is input, includes a coding unit that creates a first bit sequence by performing the error correction coding on the input bit sequence, an extraction unit that extracts a second bit sequence from the first bit sequence, and an information compression unit that creates a third bit sequence by performing lossy compression on the second bit sequence, in which coded bits include at least a portion of the third bit sequence.
    Type: Application
    Filed: August 13, 2013
    Publication date: August 27, 2015
    Applicants: OSAKA UNIVERSITY, Sharp Kabushiki Kaisha
    Inventors: Jungo Goto, Hiroki Takahashi, Osamu Nakamura, Kazunari Yokomakura, Yasuhiro Hamaguchi, Shinsuke Ibi, Seiichi Sampei, Shinichi Miyamoto
  • Publication number: 20150208412
    Abstract: A wireless communication system includes a first communication device and a second communication device, in which the first communication device includes a cyclostationarity assignment unit that establishes a correlation between signals on two subcarriers that are a predetermined interval away from each other, the two subcarriers including at least one subcarrier on which a data signal to be transmitted to the second communication device is arranged, and the second communication device includes a frequency interval determination unit that determines the predetermined frequency interval according to information that has to be notified to a different device by the first communication device. Thus, a communication system is provided that is capable of suppressing a decrease in frame efficiency when assigning cyclostationarity.
    Type: Application
    Filed: August 13, 2013
    Publication date: July 23, 2015
    Applicants: OSAKA UNIVERSITY, SHARP KABUSHIKI KAISHA
    Inventors: Osamu Nakamura, Hiroki Takahashi, Jungo Goto, Kazunari Yokomakura, Yasuhiro Hamaguchi, Seiichi Sampei, Shinsuke Ibi, Shinichi Miyamoto
  • Patent number: 8995540
    Abstract: To provide a system that can accommodate a greater number of terminals within a limited band and can obtain a higher transmission rate. While the number of frequency signals (spectrums) output in parallel by performing a spread spectrum from the DFT unit of each terminal is 12, the number of sub-carriers constituting one sub-channel is set at 10 or 11. In this case, the users (users A and G) allocated to the sub-channels at both ends of the band will not perform transmission of one frequency signal at the end (one sub-carrier) of all the frequency signals output from the DFT unit, whereas the users (users B to F) allocated to the other sub-channels will not perform transmission of the frequency signals at the ends (two sub-carriers). This transmission can be realized by deleting (clipping) the associated number of signals from both ends or from one end of the frequency signals output from the DFT unit of each terminal and allocating the frequency signals after clipping, to individual sub-channels.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: March 31, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shimpei To, Minoru Kubota, Yasuhiro Hamaguchi, Osamu Nakamura, Kazunari Yokomakura, Seiichi Sampei, Shinichi Miyamoto, Shinsuke Ibi
  • Patent number: 8887029
    Abstract: A communication device includes a turbo encoding section including a plurality of component encoders, wherein the plurality of component encoders within the turbo encoding section use different constraint lengths.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: November 11, 2014
    Assignees: Sharp Kabushiki Kaisha, Osaka University
    Inventors: Jungo Goto, Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Hiroki Takahashi, Shinsuke Ibi, Seiichi Sampei, Shinichi Miyamoto
  • Patent number: 8787243
    Abstract: A wireless communication system includes: a multiple number of mobile station apparatuses that transmit code bits obtained by applying error-correction coding to information bits; a relay station apparatus that receives code bits from the multiple mobile station apparatuses, applies network coding on the code bits and transmits the network-code bits; and a base station apparatus that receives and decodes the code bits and the network-code bits, wherein the base station apparatus, when decoding the received code bits, performs iteration decoding by regarding the received code bits as a serially concatenated code of network coding and error correction coding. Accordingly, decoding is performed by regarding the network code and the error correction code as a serial concatenated code, it is possible to obtain diversity with a simple configuration.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: July 22, 2014
    Assignees: Sharp Kabushiki Kaisha, Osaka University
    Inventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Hiroki Takahashi, Jungo Goto, Osamu Nakamura, Shinsuke Ibi, Seiichi Sampei, Shinichi Miyamoto
  • Publication number: 20140185594
    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: Application
    Filed: March 6, 2014
    Publication date: July 3, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazunari YOKOMAKURA, Yasuhiro HAMAGUCHI, Shimpei TO, Minoru KUBOTA, Hideo NAMBA, Seiichi SAMPEI, Shinichi MIYAMOTO, Shinsuke IBI
  • Patent number: 8718151
    Abstract: A transmission method according to the present invention has been conceived assuming an environment where two information source nodes independently communicate with one destination node, and thus is applicable to such a simple topology. The transmission method provides an inter-node cooperation relationship which provides a sufficient advantageous effect even in an environment in which there is a difference in the power levels of the received signals that reach the address node via two routes. The transmission method is performed by a node U1 (40) and a node U2 that is located closer to the node D (60) than the node U1 (40) to transmit signals to a node D (60) which iteratively detects a log likelihood ratio between mutually corresponding pairs of bits included in the signals at constellation points.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: May 6, 2014
    Assignee: Osaka University
    Inventors: Shinsuke Ibi, Seiichi Sampei