Patents by Inventor Masayoshi OSHIRO
Masayoshi OSHIRO 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: 11899097Abstract: A distance measurement device of an embodiment includes a first device including a first reference signal source and a first transmitter-receiver, a second device including a second reference signal source and a second transmitter-receiver, and a calculation unit configured to calculate a distance between the first device and the second device. One of a first distance measurement signal and a second distance measurement signal is transmitted once or more, and another is transmitted twice or more. The calculation unit calculates the distance based on a total of three or more pieces of first phase information and second phase information acquired through transmission of the distance measurement signals three times or more in total, a first sampling period based on a first reference signal, and a second sampling period based on a second reference signal.Type: GrantFiled: March 12, 2021Date of Patent: February 13, 2024Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Shoji Ootaka, Masaki Nishikawa, Katsuya Nonin, Hiroshi Yoshida, Masayoshi Oshiro
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Patent number: 11860264Abstract: A ranging apparatus of an embodiment is a ranging apparatus adopting communication type ranging by a phase detection scheme. The ranging apparatus including: a transmitting circuit configured to be able to transmit by a plurality of channels used for data communication and configured to transmit a transmission signal obtained by modulating transmission data; and a control circuit configured to control the transmission circuit to cause a plurality of continuous waves having mutually different frequencies to be generated in a same channel as continuous waves used for ranging by the phase detection scheme.Type: GrantFiled: August 28, 2020Date of Patent: January 2, 2024Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Hiroshi Yoshida, Masaki Nishikawa, Shoji Ootaka, Katsuya Nonin, Masayoshi Oshiro
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Patent number: 11785548Abstract: A transmission apparatus according to an embodiment includes a power amplifier, an antenna switch, and a control circuit. The power amplifier amplifies and outputs a transmission signal. The antenna switch switches, among at least two or more antennas, an antenna configured to output the transmission signal from the power amplifier. The control circuit performs output power control of the power amplifier when the control circuit outputs to the antenna switch a switching control signal for switching the antenna.Type: GrantFiled: October 25, 2021Date of Patent: October 10, 2023Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventor: Masayoshi Oshiro
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Patent number: 11573315Abstract: According to an embodiment, a first device includes: a first transceiver configured to transmit two or more first carrier signals using an output of a first reference signal source and to receive two or more second carrier signals; and a calculation unit, and a second device includes: a second transceiver configured to transmit the two or more second carrier signals using an output of a second reference signal source that operates independently of the first reference signal source and to receive the two or more first carrier signals. A frequency group of the two or more first carrier signals and a frequency group of the two or more second carrier signals are identical or substantially identical to each other, and the calculation unit calculates the distance between the first device and the second device based on a phase detection result obtained by receiving the first and second carrier signals.Type: GrantFiled: March 6, 2020Date of Patent: February 7, 2023Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Shoji Ootaka, Takayuki Kato, Masaki Nishikawa, Hiroshi Yoshida, Katsuya Nonin, Yoshiharu Nito, Masayoshi Oshiro
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Patent number: 11560121Abstract: A first device includes: a first reference signal source; a first transmitting/receiving unit which transmits two or more first carrier signals and receives two or more second carrier signals using an output of the first reference signal source; and a calculating unit. A second device includes: a second reference signal source configured to be operated independently from the first reference signal source; and a second transmitting/receiving unit configured to transmit two or more second carrier signals and receive two or more first carrier signals using an output of the second reference signal source. A frequency group of two or more first carrier signals and a frequency group of two or more second carrier signals differ from each other. The calculating unit calculates a distance between the first device and the second device based on a phase detection result obtained by receiving the first and second carrier signals.Type: GrantFiled: March 6, 2020Date of Patent: January 24, 2023Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Shoji Ootaka, Tsuneo Suzuki, Hiroshi Yoshida, Masaki Nishikawa, Katsuya Nonin, Takayuki Kato, Yoshiharu Nito, Masayoshi Oshiro
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Patent number: 11536824Abstract: A distance measuring apparatus according to an embodiment includes, a filter section configured to perform band limitation on a transmission signal and output the transmission signal, and to perform band limitation on a reception signal from an antenna section and output the reception signal, a distance measuring section configured to perform a distance measurement computation based on the transmission signal and the reception signal, and to obtain a delay of a signal passing through the filter section and perform calibration of the distance measurement computation, a signal interruption section configured to interrupt transmission of a signal between the filter section and the antenna section, and a control section configured to control the signal interruption section to interrupt the transmission of the signal during a period of the calibration.Type: GrantFiled: March 6, 2020Date of Patent: December 27, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Takayuki Kato, Shoji Ootaka, Tsuneo Suzuki, Masaki Nishikawa, Katsuya Nonin, Hiroshi Yoshida, Yoshiharu Nito, Masayoshi Oshiro
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Patent number: 11333735Abstract: A wireless communication device includes a transmission section configured to output a calibration signal transmitted from a calibration antenna, a reception section configured to have input of a received signal from an antenna and obtain a baseband signal from the received signal, a correction phase calculation circuit configured to calculate a correction phase for correcting the baseband signal according to a deviation between a reception phase calculated based on the baseband signal obtained when the antenna receives the calibration signal and an ideal phase associated with the antenna, and a storage section configured to store the ideal phase and the correction phase.Type: GrantFiled: September 5, 2019Date of Patent: May 17, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventor: Masayoshi Oshiro
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Publication number: 20220091253Abstract: A distance measurement device of an embodiment includes a first device including a first reference signal source and a first transmitter-receiver, a second device including a second reference signal source and a second transmitter-receiver, and a calculation unit configured to calculate a distance between the first device and the second device. One of a first distance measurement signal and a second distance measurement signal is transmitted once or more, and another is transmitted twice or more. The calculation unit calculates the distance based on a total of three or more pieces of first phase information and second phase information acquired through transmission of the distance measurement signals three times or more in total, a first sampling period based on a first reference signal, and a second sampling period based on a second reference signal.Type: ApplicationFiled: March 12, 2021Publication date: March 24, 2022Inventors: Shoji Ootaka, Masaki Nishikawa, Katsuya Nonin, Hiroshi Yoshida, Masayoshi Oshiro
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Publication number: 20220046545Abstract: A transmission apparatus according to an embodiment includes a power amplifier, an antenna switch, and a control circuit. The power amplifier amplifies and outputs a transmission signal. The antenna switch switches, among at least two or more antennas, an antenna configured to output the transmission signal from the power amplifier. The control circuit performs output power control of the power amplifier when the control circuit outputs to the antenna switch a switching control signal for switching the antenna.Type: ApplicationFiled: October 25, 2021Publication date: February 10, 2022Inventor: Masayoshi Oshiro
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Patent number: 11199622Abstract: A distance measurement apparatus of an embodiment includes a first device provided in a vehicle and a second device provided in a key-fob, and calculates a distance between the vehicle and the key-fob based on carrier phase detection. In at least one of the first device and the second device, transmission powers at which a plurality of first distance measurement signals are respectively transmitted when the key-fob is inside the vehicle are set to be lower than transmission powers at which a plurality of first distance measurement signals are respectively transmitted when the key-fob is outside the vehicle.Type: GrantFiled: August 26, 2020Date of Patent: December 14, 2021Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Hiroshi Yoshida, Shoji Ootaka, Katsuya Nonin, Masaki Nishikawa, Masayoshi Oshiro
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Patent number: 11191022Abstract: A transmission apparatus according to an embodiment includes a power amplifier, an antenna switch, and a control circuit. The power amplifier amplifies and outputs a transmission signal. The antenna switch switches, among at least two or more antennas, an antenna configured to output the transmission signal from the power amplifier. The control circuit performs output power control of the power amplifier when the control circuit outputs to the antenna switch a switching control signal for switching the antenna.Type: GrantFiled: February 26, 2020Date of Patent: November 30, 2021Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventor: Masayoshi Oshiro
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Publication number: 20210286065Abstract: A ranging apparatus of an embodiment is a ranging apparatus adopting communication type ranging by a phase detection scheme. The ranging apparatus including: a transmitting circuit configured to be able to transmit by a plurality of channels used for data communication and configured to transmit a transmission signal obtained by modulating transmission data; and a control circuit configured to control the transmission circuit to cause a plurality of continuous waves having mutually different frequencies to be generated in a same channel as continuous waves used for ranging by the phase detection scheme.Type: ApplicationFiled: August 28, 2020Publication date: September 16, 2021Inventors: Hiroshi Yoshida, Masaki Nishikawa, Shoji Ootaka, Katsuya Nonin, Masayoshi Oshiro
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Publication number: 20210270956Abstract: A distance measurement apparatus of an embodiment includes a first device provided in a vehicle and a second device provided in a key-fob, and calculates a distance between the vehicle and the key-fob based on carrier phase detection. In at least one of the first device and the second device, transmission powers at which a plurality of first distance measurement signals are respectively transmitted when the key-fob is inside the vehicle are set to be lower than transmission powers at which a plurality of first distance measurement signals are respectively transmitted when the key-fob is outside the vehicle.Type: ApplicationFiled: August 26, 2020Publication date: September 2, 2021Inventors: Hiroshi Yoshida, Shoji Ootaka, Katsuya Nonin, Masaki Nishikawa, Masayoshi Oshiro
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Publication number: 20210088642Abstract: A distance measuring apparatus according to an embodiment includes, a filter section configured to perform band limitation on a transmission signal and output the transmission signal, and to perform band limitation on a reception signal from an antenna section and output the reception signal, a distance measuring section configured to perform a distance measurement computation based on the transmission signal and the reception signal, and to obtain a delay of a signal passing through the filter section and perform calibration of the distance measurement computation, a signal interruption section configured to interrupt transmission of a signal between the filter section and the antenna section, and a control section configured to control the signal interruption section to interrupt the transmission of the signal during a period of the calibration.Type: ApplicationFiled: March 6, 2020Publication date: March 25, 2021Inventors: Takayuki Kato, Shoji Ootaka, Tsuneo Suzuki, Masaki Nishikawa, Katsuya Nonin, Hiroshi Yoshida, Yoshiharu Nito, Masayoshi Oshiro
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Publication number: 20210088646Abstract: According to an embodiment, a first device includes: a first transceiver configured to transmit two or more first carrier signals using an output of a first reference signal source and to receive two or more second carrier signals; and a calculation unit, and a second device includes: a second transceiver configured to transmit the two or more second carrier signals using an output of a second reference signal source that operates independently of the first reference signal source and to receive the two or more first carrier signals. A frequency group of the two or more first carrier signals and a frequency group of the two or more second carrier signals are identical or substantially identical to each other, and the calculation unit calculates the distance between the first device and the second device based on a phase detection result obtained by receiving the first and second carrier signals.Type: ApplicationFiled: March 6, 2020Publication date: March 25, 2021Inventors: Shoji Ootaka, Takayuki Kato, Masaki Nishikawa, Hiroshi Yoshida, Katsuya Nonin, Yoshiharu Nito, Masayoshi Oshiro
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Publication number: 20210078537Abstract: A first device includes: a first reference signal source; a first transmitting/receiving unit which transmits two or more first carrier signals and receives two or more second carrier signals using an output of the first reference signal source; and a calculating unit. A second device includes: a second reference signal source configured to be operated independently from the first reference signal source; and a second transmitting/receiving unit configured to transmit two or more second carrier signals and receive two or more first carrier signals using an output of the second reference signal source. A frequency group of two or more first carrier signals and a frequency group of two or more second carrier signals differ from each other. The calculating unit calculates a distance between the first device and the second device based on a phase detection result obtained by receiving the first and second carrier signals.Type: ApplicationFiled: March 6, 2020Publication date: March 18, 2021Inventors: Shoji Ootaka, Tsuneo Suzuki, Hiroshi Yoshida, Masaki Nishikawa, Katsuya Nonin, Takayuki Kato, Yoshiharu Nito, Masayoshi Oshiro
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Publication number: 20210068057Abstract: A transmission apparatus according to an embodiment includes a power amplifier, an antenna switch, and a control circuit. The power amplifier amplifies and outputs a transmission signal. The antenna switch switches, among at least two or more antennas, an antenna configured to output the transmission signal from the power amplifier. The control circuit performs output power control of the power amplifier when the control circuit outputs to the antenna switch a switching control signal for switching the antenna.Type: ApplicationFiled: February 26, 2020Publication date: March 4, 2021Inventor: Masayoshi Oshiro
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Publication number: 20200081089Abstract: A wireless communication device includes a transmission section configured to output a calibration signal transmitted from a calibration antenna, a reception section configured to have input of a received signal from an antenna and obtain a baseband signal from the received signal, a correction phase calculation circuit configured to calculate a correction phase for correcting the baseband signal according to a deviation between a reception phase calculated based on the baseband signal obtained when the antenna receives the calibration signal and an ideal phase associated with the antenna, and a storage section configured to store the ideal phase and the correction phase.Type: ApplicationFiled: September 5, 2019Publication date: March 12, 2020Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventor: Masayoshi OSHIRO
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Patent number: 10432392Abstract: A frame synchronization method of an embodiment is disclosed. The method includes comparing a preamble arranged at a predetermined position in a received signal with a predetermined signal pattern to calculate a maximum preamble correlation value, using the maximum preamble correlation value to estimate a C/N ratio of the received signal, setting a correlation threshold for frame synchronization detection according to the estimated C/N ratio, and comparing an access address arranged at a predetermined position in the received signal with a predetermined signal pattern to calculate a preamble correlation value, and detecting timing at which the preamble correlation value first exceeds the set correlation threshold as a frame synchronization point.Type: GrantFiled: September 5, 2018Date of Patent: October 1, 2019Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Masayoshi Oshiro, Takashi Seki
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Publication number: 20190296889Abstract: A frame synchronization method of an embodiment is disclosed. The method includes comparing a preamble arranged at a predetermined position in a received signal with a predetermined signal pattern to calculate a maximum preamble correlation value, using the maximum preamble correlation value to estimate a C/N ratio of the received signal, setting a correlation threshold for frame synchronization detection according to the estimated C/N ratio, and comparing an access address arranged at a predetermined position in the received signal with a predetermined signal pattern to calculate a preamble correlation value, and detecting timing at which the preamble correlation value first exceeds the set correlation threshold as a frame synchronization point.Type: ApplicationFiled: September 5, 2018Publication date: September 26, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Masayoshi OSHIRO, Takashi SEKI