Patents by Inventor Jungo Goto

Jungo Goto 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: 8824600
    Abstract: Even when respective transmitters use different transmission schemes, signals of the respective transmitters are separated. A receiver that is applied to a multiuser MIMO system in which a plurality of transmitters performs transmission to at least one receiver, includes a MIMO separation part 40 that receives signals transmitted in different transmission schemes at the same time and at the same frequency and separates the received signals for each transmitter, a switching part 41 that switches output destinations according to the transmission scheme of the separated signal, and a single-carrier processing part 42 and a multi-carrier processing part 43 provided for each transmission scheme for processing a signal output from the switching part 41 according to its transmission scheme.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: September 2, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Osamu Nakamura, Shuuji Urabe, Yasuhiro Hamaguchi, Kazunari Yokomakura, Jungo Goto, Hiroki Takahashi
  • Publication number: 20140219318
    Abstract: A control station apparatus comprising a transmitter that is configured to transmit, to a terminal apparatus, information indicating an allocation method for allocating frequency signals to a plurality of subcarriers, where the information indicates a communication scheme which is one of Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme and Clustered Discrete Fourier Transform-spread-OFDM (Clustered DFT-S-OFDM) scheme.
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro HAMAGUCHI, Kazunari YOKOMAKURA, Osamu NAKAMURA, Jungo GOTO, Hiroki TAKAHASHI, Toshizo NOGAMI
  • Publication number: 20140205038
    Abstract: In a cellular system, new precoding that enables the performance of precoding to be adequately utilized is introduced, and thereby throughput is increased. There is provided a terminal device that includes a plurality of transmit antennas and that performs precoding on a transmit signal. The terminal device includes a codebook selector 251 configured to select any one of a plurality of codebooks each including a plurality of precoding matrices, in accordance with the number of the transmit antennas and a transmission parameter other than the number of the transmit antennas, and a precoding matrix selector 255 configured to select any one precoding matrix from the selected codebook, in accordance with a PMI (Precoding Matrix Indicator).
    Type: Application
    Filed: July 26, 2012
    Publication date: July 24, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Osamu Nakamura, Jungo Goto, Kazunari Yokomakura, Yasuhiro Hamaguchi
  • 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: 20140187229
    Abstract: A wireless transmission apparatus that transmits transmission data in each of a plurality of system frequency bands using a transmission power controlled so that a total transmission power of each of the plurality of system frequency bands is less than a maximum transmit power, where the maximum transmit power incase of transmitting the transmission data simultaneously using two or more system frequency bands in the plurality of system frequency bands is less than a maximum transmit power in case of transmitting the transmission data using single system frequency band in the plurality of system frequency band.
    Type: Application
    Filed: March 4, 2014
    Publication date: July 3, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro HAMAGUCHI, Kazunari YOKOMAKURA, Osamu NAKAMURA, Jungo GOTO, Hiroki TAKAHASHI
  • Patent number: 8730896
    Abstract: In the system of a variable transmission bandwidth, transmit power control for minimizing an impact on a circuit is performed. There is provided a transmit power control method that is applied to a transmission apparatus that transmits data through the use of a different transmission format at each transmission opportunity, in which transmit power is controlled depending on the transmission format before digital/analogue conversion is performed on transmission data, and, based on the transmit power control, the transmit power is controlled on the transmission data that has been subjected for the digital/analogue conversion. In addition, the transmission format specifies a frequency bandwidth used for transmission of the transmission data.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: May 20, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Jungo Goto, Hiroki Takahashi, Daiichiro Nakashima
  • Patent number: 8731077
    Abstract: To switch among access schemes of different systems efficiently, in a wireless communication system for selecting one access scheme from among a plurality of access schemes to perform wireless communications in between a control station apparatus and a terminal apparatus, the control station apparatus notifies the terminal apparatus of an access scheme using information indirectly designating the access scheme, and the terminal apparatus selects one access scheme from among a plurality of access schemes according to the notified information to perform wireless communications with the control station apparatus.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: May 20, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Jungo Goto, Hiroki Takahashi, Toshizo Nogami
  • Publication number: 20140126507
    Abstract: In a communication system using retransmission control, throughput reduction is suppressed in a state in which an occurrence rate of retransmission is high. A receiving apparatus configured to, in a case where a signal received from a transmitting apparatus includes an error, request the transmitting apparatus to provide a retransmission signal, includes check units 217-1 to 217-U that make a determination as to whether the signal received from the transmitting apparatus includes an error, and a scheduling unit 211 that performs a frequency assignment such that in a case where a result of the determination indicates that the received signal includes an error, at least a part of a frequency band used by the transmitting apparatus to transmit the retransmission signal overlaps at least a part of a frequency band used by the transmitting apparatus or another different transmitting apparatus to transmit a signal other than the retransmission signal.
    Type: Application
    Filed: June 13, 2012
    Publication date: May 8, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroki Takahashi, Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Jungo Goto
  • Patent number: 8719679
    Abstract: To improve performance of a decoder even in a system with the coder configuration determined by inserting a doping bit sequence known between a transmission apparatus and a reception apparatus in an information bit sequence to transmit, the transmission apparatus is a transmission apparatus that transmits radio signals to the reception apparatus, and is provided with a doping section 23 that inserts a doping bit sequence which is known between the transmission apparatus and the reception apparatus in an information bit sequence to transmit to the reception apparatus, coding sections 11a, 11b that perform error-correcting coding on a bit sequence with the doping bit sequence inserted therein, a puncturing section that performs puncturing on a bit sequence subjected to the error-correcting coding, and a wireless transmission section 24 that transmits a bit sequence subjected to the puncturing.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: May 6, 2014
    Assignees: Sharp Kabushiki Kaisha, Osaka University
    Inventors: Osamu Nakamura, Yasuhiro Hamaguchi, Kazunari Yokomakura, Jungo Goto, Hiroki Takahashi, Shinsuke Ibi, Seiichi Sampei, Shinichi Miyamoto
  • Patent number: 8717992
    Abstract: Even when communication is performed independently in each CC (Component Carrier), the occurrence of an error in communication is prevented. Provided is a wireless communication system in which a wireless transmission apparatus and a wireless reception apparatus communicate with each other using a plurality of system frequency bands, wherein the wireless transmission apparatus performs transmission power control on transmission data in each of the system frequency bands, and furthermore, a maximum transmission power which can be transmitted in each of the system frequency bands can be controlled so as to be different from each other. Priorities are set on each of the system frequency bands, and transmission powers of the system frequency bands are determined in descending order of the priorities.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: May 6, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Jungo Goto, Hiroki Takahashi
  • Publication number: 20140119326
    Abstract: A base station which includes a transmission section that is configured to transmit, to a mobile station, first information indicating first control information for controlling a number of transmission antennas of the mobile station for retransmitting transmission data with at least second information indicating a retransmission request and third information indicating second control information for controlling retransmission power for retransmitting the transmission data. The base station also includes a radio section configured to receive, from the mobile station, the transmission data.
    Type: Application
    Filed: January 3, 2014
    Publication date: May 1, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Jungo GOTO, Yasuhiro HAMAGUCHI, Kazunari YOKOMAKURA, Osamu NAKAMURA, Hiroki TAKAHASHI
  • Patent number: 8687735
    Abstract: According to the present invention, a transmitter includes: multiple antennas 15-1, 15-2; a DFT unit 04 configured to transform a time domain signal into a frequency domain signal; a cluster mapping unit 05 configured to divide the frequency domain signal into clusters and to assign the clusters to frequencies on the basis of cluster assignment information; an IDFT unit 06 configured to transform a mapped frequency domain signal into a time domain signal; and cyclic delay setting units 11-1, 11-2 configured to set, for the respective multiple antennas, a cyclic delay amount to the IDFT-transformed time domain signal.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: April 1, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroki Takahashi, Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Jungo Goto
  • Publication number: 20140056213
    Abstract: A frequency resource required for communication between an RS and an eNB is reduced. Provided is a radio relay method for relaying a radio signal exchanged between a mobile station and a base station. The radio relay method includes performing relaying such that a frequency to be used in a case of relaying at least one of transmission signals transmitted from a plurality of mobile stations is overlapped with and allocated to at least a part of a frequency to which another non-relayed transmission signal is allocated. The frequency to be used for transmitting the relayed transmission signal may be disposed discretely on a frequency axis.
    Type: Application
    Filed: April 26, 2012
    Publication date: February 27, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Jungo Goto, Hiroki Takahashi, Osamu Nakamura, Kazunari Yokomakura, Yasuhiro Hamaguchi
  • Patent number: 8654730
    Abstract: A wireless communication system which includes a base station and a mobile station and in which the mobile station performs data transmission to the base station by allocating a transmission signal converted into a frequency signal to contiguous frequency bands or non-contiguous frequency bands divided into a predetermined number, wherein, when retransmission occurs in the data transmission the mobile station has performed by allocating the transmission signal converted into the frequency signal into the non-contiguous frequency bands, the base station determines a transmission power headroom of the mobile station in the allocation of the transmission signal to the non-contiguous frequency bands, and, if a result of the determination shows that there is not a transmission power headroom, the base station instructs the mobile station to allocate the transmission signal to the contiguous frequency bands and to perform the retransmission by increasing transmission power.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: February 18, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Jungo Goto, Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Hiroki Takahashi
  • Patent number: 8649357
    Abstract: To reduce power consumption in a mobile station apparatus in uplink, while making the system more efficient, the mobile station apparatus has a plurality of transmission antennas 7, performs wireless communications with a base station apparatus, and is provided with a PDCCH reception part 2 that receives designation information for designating the number of transmission antennas to use from the base station apparatus, a PH calculation part 5 that calculates PH (Power Headroom) indicative of a difference between maximum transmission power and transmission power required to achieve desired reception power in the base station apparatus, and a PUSCH transmission part 6 that transmits a signal including the PH to the base station apparatus using the number of transmission antennas designated by the designation information.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: February 11, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Jungo Goto, Hiroki Takahashi
  • Publication number: 20130343320
    Abstract: A DMRS generator generates reference signals used for demodulation to which orthogonal codes, which are a code for one layer and a code for another layer being orthogonal to each other, are assigned. Concerning each of layers up to the predetermined number of layers, codes are assigned to the reference signals according to the same rules as assignment rules employed in a different terminal device. Accordingly, the throughput can be increased.
    Type: Application
    Filed: March 5, 2012
    Publication date: December 26, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Osamu Nakamura, Hiroki Takahashi, Jungo Goto, Kazunari Yokomakura, Yasuhiro Hamaguchi
  • Publication number: 20130336276
    Abstract: A transmitting device is a transmitting device configured to transmit a signal, and is provisioned with a determination unit configured to determine whether or not to perform a frequency clipping to remove a portion of a spectrum of the signal to transmit on the basis of a control information representing a frequency band used by the transmitting device to transmit data.
    Type: Application
    Filed: February 21, 2012
    Publication date: December 19, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroki Takahashi, Yasuhiro Hamaguchi, Kazunari Yokomakura, Osamu Nakamura, Jungo Goto
  • Publication number: 20130329829
    Abstract: In a transmission method using spectrum shaping, interference to other cells caused by an increase in transmit power of mobile station apparatuses is suppressed. A wireless control apparatus performs control in which at least one wireless terminal apparatus clips part of frequencies in a system band and locates a transmit signal. The wireless control apparatus determines frequencies at which the individual wireless terminal apparatuses locate transmit signals, so that an interference level of the entire system band is suppressed to be lower than or equal to a certain value. Also, the wireless control apparatus determines frequencies at which the individual wireless terminal apparatuses locate transmit signals, so that a total sum of frequency bands allocated to the wireless terminal apparatuses before clipping is smaller than or equal to the system band.
    Type: Application
    Filed: January 30, 2012
    Publication date: December 12, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazunari Yokomakura, Yasuhiro Hamaguchi, Osamu Nakamura, Jungo Goto, Hiroki Takahashi
  • Publication number: 20130329830
    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: Application
    Filed: February 24, 2012
    Publication date: December 12, 2013
    Applicants: OSAKA UNIVERSITY, SHARP KABUSHIKI KAISHA
    Inventors: Kazunari Yokomakura, Osamu Nakamura, Jungo Goto, Yasuhiro Hamaguchi, Hiroki Takahashi, Seiichi Sampei, Shinsuke Ibi, Shinichi Miyamoto
  • Publication number: 20130329682
    Abstract: A convergence property as ability of removing inter-user interference of turbo equalization is improved in case of using a transmission method in which overlapping of a part of spectrum is allowed among a plurality of users.
    Type: Application
    Filed: December 8, 2011
    Publication date: December 12, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Jungo Goto, Hiroki Takahashi, Osamu Nakamura, Kazunari Yokomakura, Yasuhiro Hamaguchi