Patents by Inventor Seiichi Izumi

Seiichi Izumi 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: 9967118
    Abstract: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3?) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel (2, 2?) characteristics of the multicarrier transmission are detected (11, 11?) at the side of the transmitter (3). The power of each subcarrier is then distributed by a weighting unit (14, 14?). The subcarriers can be further pre-equalized (1, 1?) by dividing the subcarrier signal respectively by the sum of the squared magnitude of the frequency channel characteristics of all subcarrier signals or a frequency characteristic of the selected antenna element (3, 3?).
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: May 8, 2018
    Assignee: SONY DEUTSCHLAND GmbH
    Inventors: Ralf Böhnke, Seiichi Izumi
  • Patent number: 9954710
    Abstract: A communication device for transmitting orthogonal frequency division multiplexed (OFDM) signals in a wireless communication system. The device includes a plurality of antenna elements that transmit the OFDM signals to a receiver over a plurality of transmission channels in the wireless communication system. The device also generates weight coefficients applied to each of the plurality of subcarrier signals, and controls an amplitude and/or phase of the plurality of subcarrier signals as a function of said weight coefficients.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: April 24, 2018
    Assignee: SONY DEUTSCHLAND GmbH
    Inventor: Seiichi Izumi
  • Publication number: 20170141940
    Abstract: A communication device for transmitting orthogonal frequency division multiplexed (OFDM) signals in a wireless communication system. The device includes a plurality of antenna elements that transmit the OFDM signals to a receiver over a plurality of transmission channels in the wireless communication system. The device also generates weight coefficients applied to each of the plurality of subcarrier signals, and controls an amplitude and/or phase of the plurality of subcarrier signals as a function of said weight coefficients.
    Type: Application
    Filed: January 30, 2017
    Publication date: May 18, 2017
    Applicant: Sony Deutschland GmbH
    Inventor: Seiichi IZUMI
  • Patent number: 9596059
    Abstract: A communication device for transmitting orthogonal frequency division multiplexed (OFDM) signals in a wireless communication system. The device includes a plurality of antenna elements that transmit the OFDM signals to a receiver over a plurality of transmission channels in the wireless communication system. The device also generates weight coefficients applied to each of the plurality of subcarrier signals, and controls an amplitude and/or phase of the plurality of subcarrier signals as a function of said weight coefficients.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: March 14, 2017
    Assignee: SONY DEUTSCHLAND GmbH
    Inventor: Seiichi Izumi
  • Publication number: 20160352549
    Abstract: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3?) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel (2, 2?) characteristics of the multicarrier transmission are detected (11, 11?) at the side of the transmitter (3). The power of each subcarrier is then distributed by a weighting unit (14, 14?). The subcarriers can be further pre-equalized (1, 1?) by dividing the subcarrier signal respectively by the sum of the squared magnitude of the frequency channel characteristics of all subcarrier signals or a frequency characteristic of the selected antenna element (3, 3?).
    Type: Application
    Filed: August 12, 2016
    Publication date: December 1, 2016
    Applicant: Sony Deutschland GmbH
    Inventors: Ralf Böhnke, Seiichi Izumi
  • Patent number: 9455806
    Abstract: A communication device for transmitting orthogonal frequency division multiplexed (OFDM) signals in a wireless communication system. The device includes a plurality of antenna elements that transmit the OFDM signals to a receiver over a plurality of transmission channels in the wireless communication system. The device also generates weight coefficients applied to each of the plurality of subcarrier signals, and controls an amplitude and/or phase of the plurality of subcarrier signals as a function of said weight coefficients.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: September 27, 2016
    Assignee: SONY DEUTSCHLAND GmbH
    Inventor: Seiichi Izumi
  • Patent number: 9450792
    Abstract: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3?) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel (2, 2?) characteristics of the multicarrier transmission are detected (11, 11?) at the side of the transmitter (3). The power of each subcarrier is then distributed by a weighting unit (14, 14?). The subcarriers can be further pre-equalized (1, 1?) by dividing the subcarrier signal respectively by the sum of the squared magnitude of the frequency channel characteristics of all subcarrier signals or a frequency characteristic of the selected antenna element (3, 3?).
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: September 20, 2016
    Assignee: SONY DEUTSCHLAND GmbH
    Inventors: Ralf Böhnke, Seiichi Izumi
  • Publication number: 20150110164
    Abstract: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3?) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel (2, 2?) characteristics of the multicarrier transmission are detected (11, 11?) at the side of the transmitter (3). The power of each subcarrier is then distributed by a weighting unit (14, 14?). The subcarriers can be further pre-equalized (1, 1?) by dividing the subcarrier signal respectively by the sum of the squared magnitude of the frequency channel characteristics of all subcarrier signals or a frequency characteristic of the selected antenna element (3, 3?).
    Type: Application
    Filed: December 30, 2014
    Publication date: April 23, 2015
    Applicant: Sony Deutschland GmbH
    Inventors: Ralf BÖHNKE, Seiichi IZUMI
  • Patent number: 9008224
    Abstract: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3?) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel (2, 2?) characteristics of the multicarrier transmission are detected (11, 11?) at the side of the transmitter (3). The power of each subcarrier is then distributed by a weighting unit (14, 14?). The subcarriers can be further pre-equalized (1, 1?) by dividing the subcarrier signal respectively by the sum of the squared magnitude of the frequency channel characteristics of all subcarrier signals or a frequency characteristic of the selected antenna element (3, 3?).
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: April 14, 2015
    Assignee: Sony Deutschland GmbH
    Inventors: Ralf Böhnke, Seiichi Izumi
  • Patent number: 8948302
    Abstract: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3?) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel (2, 2?) characteristics of the multicarrier transmission are detected (11, 11?) at the side of the transmitter (3). The power of each subcarrier is then distributed by a weighting unit (14, 14?). The subcarriers can be further pre-equalized (1, 1?) by dividing the subcarrier signal respectively by the sum of the squared magnitude of the frequency channel characteristics of all subcarrier signals or a frequency characteristic of the selected antenna element (3, 3?).
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: February 3, 2015
    Assignee: Sony Deutschland GmbH
    Inventors: Ralf Böhnke, Seiichi Izumi
  • Patent number: 8817578
    Abstract: There is provided a sonic wave output device comprising, a receiving unit to receive wireless signals transmitted from a certain signal source, a determination unit to determine a parameter value depending on a location of the signal source using the wireless signals received by the receiving unit and a sonic wave output unit to output sonic waves with directionality toward a direction of the signal source based on the parameter value.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: August 26, 2014
    Assignee: Sony Corporation
    Inventors: Seiichi Izumi, Hiroyuki Fukada
  • Patent number: 8743675
    Abstract: A communication device for transmitting orthogonal frequency division multiplexed (OFDM) signals in a wireless communication system. The device includes a plurality of antenna elements that transmit the OFDM signals to a receiver over a plurality of transmission channels in the wireless communication system. The device also generates weight coefficients applied to each of the plurality of subcarrier signals, and controls an amplitude and/or phase of the plurality of subcarrier signals as a function of said weight coefficients.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: June 3, 2014
    Assignee: Sony Deutschland GmbH
    Inventor: Seiichi Izumi
  • Publication number: 20140037022
    Abstract: A communication device for transmitting orthogonal frequency division multiplexed (OFDM) signals in a wireless communication system. The device includes a plurality of antenna elements that transmit the OFDM signals to a receiver over a plurality of transmission channels in the wireless communication system. The device also generates weight coefficients applied to each of the plurality of subcarrier signals, and controls an amplitude and/or phase of the plurality of subcarrier signals as a function of said weight coefficients.
    Type: Application
    Filed: October 10, 2013
    Publication date: February 6, 2014
    Applicant: Sony Deutschland GmbH
    Inventor: Seiichi IZUMI
  • Publication number: 20140037021
    Abstract: A communication device for transmitting orthogonal frequency division multiplexed (OFDM) signals in a wireless communication system. The device includes a plurality of antenna elements that transmit the OFDM signals to a receiver over a plurality of transmission channels in the wireless communication system. The device also generates weight coefficients applied to each of the plurality of subcarrier signals, and controls an amplitude and/or phase of the plurality of subcarrier signals as a function of said weight coefficients.
    Type: Application
    Filed: October 10, 2013
    Publication date: February 6, 2014
    Applicant: Sony Deutschland GmbH
    Inventor: Seiichi IZUMI
  • Publication number: 20140029688
    Abstract: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3?) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel (2, 2?) characteristics of the multicarrier transmission are detected (11, 11?) at the side of the transmitter (3). The power of each subcarrier is then distributed by a weighting unit (14, 14?). The subcarriers can be further pre-equalized (1, 1?) by dividing the subcarrier signal respectively by the sum of the squared magnitude of the frequency channel characteristics of all subcarrier signals or a frequency characteristic of the selected antenna element (3, 3?).
    Type: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: Sony Deutschland GmbH
    Inventors: Ralf BÖHNKE, Seiichi IZUMI
  • Patent number: 8456362
    Abstract: There is provided a receiving apparatus including a plurality of receiving antennas, each of which receives a radio signal in which sub-carriers of different frequencies are multiplexed, a phase calculation unit that calculates a phase difference of each radio signal received by the plurality of receiving antennas from that of a reference signal for each of the sub-carriers contained in the radio signals, and a path difference calculation unit that calculates a path difference, which is a difference of distances from a transmitting antenna from which the radio signals are transmitted to any two receiving antennas of the plurality of receiving antennas, based on the phase difference calculated by the phase calculation unit.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: June 4, 2013
    Assignee: Sony Corporation
    Inventors: Seiichi Izumi, Hiroaki Takano, Masanori Sato, Hiroyuki Fukada
  • Patent number: 8457250
    Abstract: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3?) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel (2, 2?) characteristics of the multicarrier transmission are detected (11, 11?) at the side of the transmitter (3). The power of each subcarrier is then distributed by a weighting unit (14, 14?). The subcarriers can be further pre-equalized (1, 1?) by dividing the subcarrier signal respectively by the sum of the squared magnitude of the frequency channel characteristics of all subcarrier signals or a frequency characteristic of the selected antenna element (3, 3?).
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: June 4, 2013
    Assignee: Sony Deutschland GmbH
    Inventors: Ralf Bohnke, Seiichi Izumi
  • Patent number: 8358681
    Abstract: There is provided a communication apparatus, including a transmission unit that transmits information by a plurality of systems and a reception unit that receives information by a plurality of systems, wherein the transmission unit includes a calibration information generation unit that generates calibration information transmitted for each the system and a calibration information generation notification generation unit that generates a calibration information generation notification indicating that the calibration information has been generated by the calibration information generation unit for each system, and the reception unit includes a calibration information detection unit that starts measurement of time based on reception of the calibration information generation notification and detecting calibration information turned back by the transmission unit for each system after a fixed time passes after starting measurement of time.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: January 22, 2013
    Assignee: Sony Corporation
    Inventors: Seiichi Izumi, Hiroaki Takahashi, Hiroaki Takano, Tomoya Yamaura
  • Patent number: 8320851
    Abstract: A wireless commutation device includes: an antenna unit including antennas transmitting and receiving wireless signals; an analog processing unit including transmitting analog circuits and receiving analog circuits processing analog transmitting and received signals; a digital processing unit processing digital transmitting and received signals; an inter-antenna propagation loss determination unit determining propagation losses between the antennas; a loopback transfer function gain acquisition unit acquiring, through loopback of a calibration signal between the antennas, gains of loopback transfer functions between antenna branches; a loopback transfer function gain correction unit correcting the gains by using the propagation losses; a correction coefficient determination unit determining the respective gain ratios among the receiving analog circuits and the transmitting analog circuits by using the corrected gains, and determining correction coefficients by using the gain ratios; and a gain calibration pro
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: November 27, 2012
    Assignee: Sony Corporation
    Inventors: Hiroaki Takano, Seiichi Izumi, Shinichi Kuroda, Tomoya Yamaura
  • Patent number: RE45269
    Abstract: In an OFDM transmission a transmission diversity technique is used without orthogonal signaling. The phases of the subcarriers received at the different antennas are compared by different techniques and then the phases of the signals for different antennas are adjusted for a subsequent transmission over the OFDM interface. The phase (and optionally amplitude) adjustment is calculated in only one (transmitting) side and no orthogonal signaling required. The number of antennas can be increased as much as necessary to get a sharper beam. The negative effects of fading and interference can be reduced so that at same time a down link transmission power can be reduced.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: December 2, 2014
    Assignee: Sony Deutschland GmbH
    Inventor: Seiichi Izumi