Patents by Inventor Yutaka Murakami

Yutaka Murakami 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).

  • Publication number: 20230023516
    Abstract: Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N?1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a?baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots.
    Type: Application
    Filed: August 29, 2022
    Publication date: January 26, 2023
    Inventors: Yutaka MURAKAMI, Tomohiro KIMURA, Mikihiro OUCHI
  • Publication number: 20230023385
    Abstract: A communication system includes an outdoor gateway and an indoor gateway. The outdoor gateway includes: a communication IF that connects to an outdoor network; and a communication IF that communicates wirelessly. The indoor gateway includes: a communication IF that connects to an indoor network; and a communication IF that connects, via wireless communication, to the communication IF included in the outdoor gateway.
    Type: Application
    Filed: September 26, 2022
    Publication date: January 26, 2023
    Inventors: Yutaka MURAKAMI, Nobuhiko HASHIDA
  • Patent number: 11563522
    Abstract: A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: January 24, 2023
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Shutai Okamura, Kiyotaka Kobayashi, Masayuki Orihashi, Kazuaki Takahashi
  • Patent number: 11563471
    Abstract: Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: January 24, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 11563489
    Abstract: A communication system includes: a plurality of cameras that generate image data by capturing images; a server that stores the image data generated by each of the plurality of cameras; and a plurality of transmission devices in one-to-one correspondence with the plurality of cameras. Each of the plurality of transmission devices transmits light, including, as a visible light communication signal, information related to communication for accessing a storage location at which the image data generated by a corresponding one of the plurality of cameras is stored in the server.
    Type: Grant
    Filed: November 10, 2021
    Date of Patent: January 24, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Nobuhiko Hashida
  • Patent number: 11563474
    Abstract: A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation.
    Type: Grant
    Filed: July 19, 2021
    Date of Patent: January 24, 2023
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 11563476
    Abstract: A transmission apparatus includes M signal processors that respectively generate modulated signals directed to M reception apparatuses, M being an integer equal to or greater than 2, and an antenna section. Each signal processor modulates a first bit sequence made up of two bits to generate a first modulated signal and a second modulated signal, and modulates a second bit sequence made up of other two bits to generate a third modulated signal and a fourth modulated signal, in a case of transmitting multiple streams to a corresponding one of the M reception apparatuses. The antenna section includes a first antenna that transmits the first modulated signal and the third modulated signal and a second antenna that transmits the second modulated signal and the fourth modulated signal. At least either the signals transmitted from the first antenna or the signals transmitted from the second antenna are phase-changed signals.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: January 24, 2023
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Publication number: 20230006696
    Abstract: A decoding apparatus includes input circuitry configured to receive coded data; and decoding circuitry configured to decode the coded data to obtain decoded data. The coded data are generated by using an encoding process at an encoding apparatus. The encoding process includes: (i) repeatedly collecting first data blocks included in the decoded data to generate at least one second data block; (ii) dividing at least one third data block included in the decoded data into fourth data blocks; (iii) allocating fifth data blocks included in the decoded data to respective sixth data blocks without collecting the first data blocks or dividing the at least one third data block; and (iv) performing an error correcting encoding on the at least one second data block, the fourth data blocks, and the sixth data blocks in accordance with a coding rate selected from a plurality of coding rates to generate parity data.
    Type: Application
    Filed: August 1, 2022
    Publication date: January 5, 2023
    Inventor: Yutaka MURAKAMI
  • Patent number: 11546057
    Abstract: A mobile terminal is a communication device that communicates using visible light, and includes: a plurality of light emitters, each of which is disposed along the front surface of the mobile terminal and transmits a visible light signal; and a plurality of light receivers, each of which is disposed along the front surface and receives a visible light signal. The plurality of light emitters are disposed on the left side of all of the plurality of light receivers, and the plurality of first light receivers are disposed on the right side of all of the plurality of light emitters.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: January 3, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Nobuhiko Hashida
  • Publication number: 20220417832
    Abstract: This communication device comprises: a control unit that sets information relating to multiband and/or multichannel communication in an extended field of a beacon signal; and a communication unit that transmits the beacon signal.
    Type: Application
    Filed: July 21, 2020
    Publication date: December 29, 2022
    Inventor: Yutaka MURAKAMI
  • Patent number: 11539408
    Abstract: A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.
    Type: Grant
    Filed: February 25, 2022
    Date of Patent: December 27, 2022
    Assignee: SUN PATENT TRUST
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 11539378
    Abstract: Disclosed are an encoder, a transmission device, and an encoding method with which the transmission amount is reduced and a deterioration in transmission efficiency is suppressed while improving reception quality when QC-LDPC or a like block encoding is used. A puncture pattern setting unit (620) searches for a puncture pattern for each integral multiple of the number of columns or for each divisor of the number of columns of a sub block matrix that forms a check matrix (H) of a QC-LDPC code, and a puncture unit (data reduction unit) (630) switches the puncture pattern for each integral multiple of the number of columns or for each divisor of the number of columns of the sub block matrix that forms the check matrix of the QC-LDPC code.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: December 27, 2022
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Yutaka Murakami, Shutai Okamura
  • Publication number: 20220407570
    Abstract: All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.
    Type: Application
    Filed: July 26, 2022
    Publication date: December 22, 2022
    Inventors: Yutaka MURAKAMI, Tomohiro KIMURA, Mikihiro OUCHI
  • Publication number: 20220393725
    Abstract: By a transmission method according to one aspect of the present disclosure, in a broadcasting system that generates a first broadcasting signal and a second broadcasting signal by performing multi-antenna encoding on program data, and wirelessly transmits a first broadcasting signal and a second broadcasting signal, a first transmit station transmits the first broadcasting signal, a second transmit station transmits the second broadcasting signal, the first transmit station and the second transmit station transmit the first broadcasting signal and the second broadcasting signal to an overlapping area at an identical time using an overlapping frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, and arrangement of the first transmit station differs from arrangement of the second transmit station.
    Type: Application
    Filed: July 28, 2022
    Publication date: December 8, 2022
    Inventors: Tomohiro KIMURA, Yutaka MURAKAMI, Mikihiro OUCHI
  • Patent number: 11522615
    Abstract: A transmission method includes: in a first period, causing a light source to emit light having a first luminance; and in a second period, causing the light source to transmit an optical signal by causing the light source to alternately emit light having a second luminance and light having a third luminance lower than the second luminance.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: December 6, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Nobuhiko Hashida, Ryutaro Monden
  • Patent number: 11522584
    Abstract: A transmission method includes encoding processing that generates an encoded block, modulation processing that generates symbols from the encoded block, phase change processing that changes the phase of the symbols, and transmission processing that arranges the symbols in data carriers and transmits the symbols. The transmission processing configures a frame by arranging symbol groups in order in the frequency direction and transmits the frame. The symbol groups each include a symbol generated from a first encoded block and a symbol generated from a second encoded block. The phase change processing includes changing the phase of symbols the same symbol group using the same phase change value.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: December 6, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi, Hiroyuki Motozuka
  • Publication number: 20220385354
    Abstract: This communication device relays a relay signal to be transmitted to and from a first communication device and a second communication device, and is connected to a first apparatus. The communication device transmits the relay signal using a first transmission slot, and also transmits, using a second transmission slot, a signal having been transmitted from the first apparatus, said signal being transmitted within the transmission period of the first transmission slot in a frequency domain different from that of the first transmission slot.
    Type: Application
    Filed: August 3, 2022
    Publication date: December 1, 2022
    Inventor: Yutaka MURAKAMI
  • Patent number: 11515922
    Abstract: An indicator in a master AP from among a plurality of APs obtains communication quality of communication with an AP which is a communication partner. In the case where the obtained communication quality is less than a threshold, the indicator causes the plurality of APs including the master AP to perform cooperative operation to transmit data. In the case where the obtained communication quality is not less than the threshold, the indicator causes the plurality of APs including the master AP to stop the cooperative operation.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: November 29, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
  • Patent number: 11515965
    Abstract: A reception device includes: a receiver that receives a multiplexed signal; a first demapper that demaps the multiplexed signal, with a second modulated symbol stream of a second data series being included in the multiplexed signal as an undefined signal component, to generate a first bit likelihood stream of a first data series; a second demapper that demaps the multiplexed signal, with a first modulated symbol stream of the first data series being included in the multiplexed signal as an undefined signal component, to generate a second bit likelihood stream of the second data series; a first decoder that performs error control decoding on the first bit likelihood stream to derive the first data series; and a second decoder that performs error control decoding on the second bit likelihood stream to derive the second data series.
    Type: Grant
    Filed: April 26, 2022
    Date of Patent: November 29, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Tomohiro Kimura, Yutaka Murakami, Mikihiro Ouchi
  • Publication number: 20220377792
    Abstract: This communication device has: a reception unit that receives a beacon signal through a first channel; a control unit that generates a sensing signal on the basis of information included in an extended area of the beacon signal; and a transmission unit that transmits the sensing signal through a second channel.
    Type: Application
    Filed: August 31, 2020
    Publication date: November 24, 2022
    Inventor: Yutaka MURAKAMI