Patents by Inventor Masayuki Nakazawa
Masayuki Nakazawa 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: 11201703Abstract: Provided is a technology capable of securing communication quality without providing an additional function such as phase correction. A base station device and a communication terminal device when operating as a transmitting device rotate inverse fast Fourier transform (IFFT) output, and copy a last portion of the rotated IFFT output to a head of the rotated IFFT output as a cyclic prefix (CP) to thereby generate a transmission signal so that there is no phase rotation at a head of a demodulation reception window set in a receiving device.Type: GrantFiled: December 21, 2017Date of Patent: December 14, 2021Assignee: Mitsubishi Electric CorporationInventors: Kuniyuki Suzuki, Masayuki Nakazawa
-
Publication number: 20210367685Abstract: A signal is transmitted and received between a base station device and a communication terminal device that are included in a communication system, through a multi-element antenna including a plurality of antenna elements. At least one of the base station device and the communication terminal device includes a PHY processing unit that is a calibration unit that performs calibration of phases and amplitudes of beams formed by the antenna elements when the signal is transmitted and received. The PHY processing unit obtains a correction value for the phases and the amplitudes of the beams in the respective antenna elements so that the phases and the amplitudes of the beams are identical among the antenna elements, and performs the calibration based on the obtained correction value.Type: ApplicationFiled: August 6, 2021Publication date: November 25, 2021Applicant: Mitsubishi Electric CorporationInventors: Hideki MORISHIGE, Masayuki NAKAZAWA, Mitsuru MOCHIZUKI, Yoshitaka HARA, Kuniyuki SUZUKI
-
Patent number: 11128389Abstract: A signal is transmitted and received between a base station device and a communication terminal device that are included in a communication system, through a multi-element antenna including a plurality of antenna elements. At least one of the base station device and the communication terminal device includes a PHY processing unit that is a calibration unit that performs calibration of phases and amplitudes of beams formed by the antenna elements when the signal is transmitted and received. The PHY processing unit obtains a correction value for the phases and the amplitudes of the beams in the respective antenna elements so that the phases and the amplitudes of the beams are identical among the antenna elements, and performs the calibration based on the obtained correction value.Type: GrantFiled: January 24, 2020Date of Patent: September 21, 2021Assignee: Mitsubishi Electric CorporationInventors: Hideki Morishige, Masayuki Nakazawa, Mitsuru Mochizuki, Yoshitaka Hara, Kuniyuki Suzuki
-
Publication number: 20210258943Abstract: A base station device is configured to set, for each communication terminal device, a radio format for signals transmitted to and received from the communication terminal device. The radio format is set for each communication terminal device in accordance with, for example, a type of use including a moving speed of the communication terminal device. The base station device may be configured to change the radio format for the communication terminal device based on the information about a change in the environment of a radio communication between the communication terminal device and the base station device and a change including the communication terminal device's location. The signals transmitted and received between the base station device and the communication terminal device include radio formats in which at least one of a length of a symbol of the signal and a length of a cyclic prefix in an OFDM scheme differs.Type: ApplicationFiled: April 7, 2021Publication date: August 19, 2021Applicant: Mitsubishi Electric CorporationInventors: Masayuki NAKAZAWA, Kuniyuki SUZUKI, Mitsuru MOCHIZUKI, Koji ONO, Takayuki NONAMI, Naohito TOMOE, Fumiki HASEGAWA
-
Patent number: 11092697Abstract: A radiation detection device (300) is used in a nuclear medicine diagnosis apparatus, and includes a plurality of scintillators (44), a semiconductor light-receiving device (SiPM), a position detection circuit (214), and a timing detection circuit (216). Each of the scintillators converts a gamma ray emitted from a subject (15) into fluorescence. The semiconductor light-receiving device is provided corresponding to each of the scintillators and converts the fluorescence converted by a corresponding one of the scintillators into an electrical signal. The position detection circuit specifies a gamma ray detection position in the scintillators based on the electrical signal from the semiconductor light-receiving device. The timing detection circuit is connected to an anode of the semiconductor light-receiving device, and specifies time information corresponding to a time of occurrence of an event in which the gamma ray is detected.Type: GrantFiled: July 3, 2017Date of Patent: August 17, 2021Assignee: Shimadzu CorporationInventors: Masayuki Nakazawa, Tetsuo Furumiya
-
Publication number: 20210176815Abstract: A narrow-bandwidth terminal device performs radio communication at a bandwidth narrower than a system bandwidth. The narrow-bandwidth terminal device in an idle state camps on a cell, and performs discontinuous reception of a signal transmitted from the cell. The terminal device also determines a reception condition of the signal, for example, whether the signal can be received. When it is determined that the signal cannot be received, the narrow-bandwidth terminal device moves out of a coverage area of the cell while continuing to perform the discontinuous reception. When it is determined that a discontinuous reception timer has been completed, the narrow-bandwidth terminal device continues to perform the discontinuous reception.Type: ApplicationFiled: February 18, 2021Publication date: June 10, 2021Applicant: Mitsubishi Electric CorporationInventors: Mitsuru MOCHIZUKI, Kuniyuki SUZUKI, Masayuki NAKAZAWA, Noriyuki FUKUI, Haruka NOZAWA
-
Patent number: 11006427Abstract: A base station device is configured to set, for each communication terminal device, a radio format for signals transmitted to and received from the communication terminal device. The radio format is set for each communication terminal device in accordance with, for example, a type of use including a moving speed of the communication terminal device. The base station device may be configured to change the radio format for the communication terminal device based on the information about a change in the environment of a radio communication between the communication terminal device and the base station device and a change including the communication terminal device's location. The signals transmitted and received between the base station device and the communication terminal device include radio formats in which at least one of a length of a symbol of the signal and a length of a cyclic prefix in an OFDM scheme differs.Type: GrantFiled: April 15, 2020Date of Patent: May 11, 2021Assignee: Mitsubishi Electric CorporationInventors: Masayuki Nakazawa, Kuniyuki Suzuki, Mitsuru Mochizuki, Koji Ono, Takayuki Nonami, Naohito Tomoe, Fumiki Hasegawa
-
Patent number: 10959283Abstract: A narrow-bandwidth terminal device performs radio communication at a bandwidth narrower than a system bandwidth. The narrow-bandwidth terminal device in an idle state camps on a cell, and performs discontinuous reception of a signal transmitted from the cell. The terminal device also determines a reception condition of the signal, for example, whether the signal can be received. When it is determined that the signal cannot be received, the narrow-bandwidth terminal device moves out of a coverage area of the cell while continuing to perform the discontinuous reception. When it is determined that a discontinuous reception timer has been completed, the narrow-bandwidth terminal device continues to perform the discontinuous reception.Type: GrantFiled: June 5, 2019Date of Patent: March 23, 2021Assignee: Mitsubishi Electric CorporationInventors: Mitsuru Mochizuki, Kuniyuki Suzuki, Masayuki Nakazawa, Noriyuki Fukui, Haruka Nozawa
-
Publication number: 20210007077Abstract: In a communication system, a plurality of base stations includes an MeNB being a first base station, and a plurality of SeNBs to be connected to the MeNB. At least one of control plane data about control of communication and user plane data about a user is transmitted to and received from a user equipment (UE) via the first base station being the MeNB. The control plane data and the user plane data are contained in information provided by a core network about communication with the UE. The communication system can simplify processing of at least one of control plane data and user plane data when a communication terminal device communicates with a plurality of base station devices.Type: ApplicationFiled: September 23, 2020Publication date: January 7, 2021Applicant: Mitsubishi Electric CorporationInventors: Masayuki NAKAZAWA, Mitsuru MOCHIZUKI, Hideo UMEHARA, Kuniyuki SUZUKI
-
Publication number: 20200412493Abstract: Provided is a communication system capable of suppressing decrease in a transmission rate. An eNB communicates with a UE using a self-contained subframe. The self-contained subframe includes a downlink signal to be transmitted from the eNB to the UE, and an uplink signal to be transmitted from the UE to the eNB in response to the downlink signal. The uplink signal has a structure including an uplink control signal indicating information for controlling transmission of the uplink signal, and uplink user data to be transmitted before and after the uplink control signal. The eNB notifies the UE of a structure of the uplink signal. The eNB may predetermine scheduling for retransmission to retransmit the downlink signal, before performing initial transmission of the downlink signal.Type: ApplicationFiled: September 14, 2020Publication date: December 31, 2020Applicant: Mitsubishi Electric CorporationInventors: Tadahiro SHIMODA, Mitsuru MOCHIZUKI, Masayuki NAKAZAWA, Fumihiro HASEGAWA
-
Patent number: 10827462Abstract: In a communication system, a plurality of base stations includes an MeNB being a first base station, and a plurality of SeNBs to be connected to the MeNB. At least one of control plane data about control of communication and user plane data about a user is transmitted to and received from a user equipment (UE) via the first base station being the MeNB. The control plane data and the user plane data are contained in information provided by a core network about communication with the UE. The communication system can simplify processing of at least one of control plane data and user plane data when a communication terminal device communicates with a plurality of base station devices.Type: GrantFiled: July 31, 2017Date of Patent: November 3, 2020Assignee: Mitsubishi Electric CorporationInventors: Masayuki Nakazawa, Mitsuru Mochizuki, Hideo Umehara, Kuniyuki Suzuki
-
Publication number: 20200333476Abstract: A radiation detection device (300) is used in a nuclear medicine diagnosis apparatus, and includes a plurality of scintillators (44), a semiconductor light-receiving device (SiPM), a position detection circuit (214), and a timing detection circuit (216). Each of the scintillators converts a gamma ray emitted from a subject (15) into fluorescence. The semiconductor light-receiving device is provided corresponding to each of the scintillators and converts the fluorescence converted by a corresponding one of the scintillators into an electrical signal. The position detection circuit specifies a gamma ray detection position in the scintillators based on the electrical signal from the semiconductor light-receiving device. The timing detection circuit is connected to an anode of the semiconductor light-receiving device, and specifies time information corresponding to a time of occurrence of an event in which the gamma ray is detected.Type: ApplicationFiled: July 3, 2017Publication date: October 22, 2020Inventors: Masayuki NAKAZAWA, Tetsuo FURUMIYA
-
Patent number: 10812228Abstract: Provided is a communication system capable of suppressing decrease in a transmission rate. An eNB communicates with a UE using a self-contained subframe. The self-contained subframe includes a downlink signal to be transmitted from the eNB to the UE, and an uplink signal to be transmitted from the UE to the eNB in response to the downlink signal. The uplink signal has a structure including an uplink control signal indicating information for controlling transmission of the uplink signal, and uplink user data to be transmitted before and after the uplink control signal. The eNB notifies the UE of a structure of the uplink signal.Type: GrantFiled: August 3, 2017Date of Patent: October 20, 2020Assignee: Mitsubishi Electric CorporationInventors: Tadahiro Shimoda, Mitsuru Mochizuki, Masayuki Nakazawa, Fumihiro Hasegawa
-
Publication number: 20200314715Abstract: When being connected to a macro cell (S-MeNB) and a small cell (SeNB), a user equipment device performs a pre-handover process of disconnecting the connection with the SeNB before a handover process of switching a macro cell connected with the UE from the macro cell (S-MeNB) that is a moving source to a macro cell (T-MeNB) that is a moving destination along with moving of the UE, and after the handover process, performs a post-handover process of reestablishing the connection with the SeNB.Type: ApplicationFiled: June 17, 2020Publication date: October 1, 2020Applicant: Mitsubishi Electric CorporationInventors: Takuya OHARA, Taisei Suemitsu, Mitsuru Mochizuki, Kuniyuki Suzuki, Masayuki Nakazawa, Daisuke Hiramatsu
-
Patent number: 10782424Abstract: Provided is a radiation detector that is capable of accurately calculating the time of occurrence of fluorescence. In addition to a configuration that calculates a single signal time, the present invention, in view of the case in which a multiple event occurs, also has a configuration that on the basis of an added signal generated by adding detection signals together, calculates the time of occurrence of fluorescence (added signal time). The radiation detector according to the present invention is configured to output the added signal time as the time of occurrence of fluorescence when the number of detection elements 3a in the fluorescence detection is plural (at the time of a multiple event). In the case of a multiple event, from the viewpoint of strengthening of a signal addition, an added signal time is more accurate than a single signal time.Type: GrantFiled: September 17, 2015Date of Patent: September 22, 2020Assignee: Shimadzu CorporationInventors: Masayuki Nakazawa, Tomoaki Tsuda
-
Patent number: 10743227Abstract: When being connected to a macro cell (S-MeNB) and a small cell (SeNB), a user equipment device performs a pre-handover process of disconnecting the connection with the SeNB before a handover process of switching a macro cell connected with the UE from the macro cell (S-MeNB) that is a moving source to a macro cell (T-MeNB) that is a moving destination along with moving of the UE, and after the handover process, performs a post-handover process of reestablishing the connection with the SeNB.Type: GrantFiled: March 16, 2015Date of Patent: August 11, 2020Assignee: Mitsubishi Electric CorporationInventors: Takuya Ohara, Taisei Suemitsu, Mitsuru Mochizuki, Kuniyuki Suzuki, Masayuki Nakazawa, Daisuke Hiramatsu
-
Publication number: 20200245318Abstract: A base station device is configured to set, for each communication terminal device, a radio format for signals transmitted to and received from the communication terminal device. The radio format is set for each communication terminal device in accordance with, for example, a type of use including a moving speed of the communication terminal device. The base station device may be configured to change the radio format for the communication terminal device based on the information about a change in the environment of a radio communication between the communication terminal device and the base station device and a change including the communication terminal device's location. The signals transmitted and received between the base station device and the communication terminal device include radio formats in which at least one of a length of a symbol of the signal and a length of a cyclic prefix in an OFDM scheme differs.Type: ApplicationFiled: April 15, 2020Publication date: July 30, 2020Applicant: Mitsubishi Electric CorporationInventors: Masayuki NAKAZAWA, Kuniyuki Suzuki, Mitsuru Mochizuki, Koji Ono, Takayuki Nonami, Naohito Tomoe, Fumiki Hasegawa
-
Publication number: 20200233101Abstract: A radiation detector (5) is configured such that weighting of detection signals of photodetectors (52) on an end portion side of the plurality of photodetectors (52) is set to be greater than weighting of detection signals of photodetectors (52) on a central portion side of the plurality of photodetectors (52).Type: ApplicationFiled: July 31, 2017Publication date: July 23, 2020Inventors: Masayuki NAKAZAWA, Tomoaki TSUDA
-
Patent number: 10702192Abstract: A dynamic analysis system includes: an analytic value calculation unit configured to calculate an analytic value in a plurality of time phases on the basis of a dynamic image in the plurality of time phases obtained by performing dynamic photography on the chest of a subject; a ventilation state calculation unit configured to calculate, using a non-linear function, an index value representing a ventilation state of a lung field from the analytic value in the plurality of time phases; a display unit; and a control unit configured to display the index value calculated on the plurality of time phases, on the display unit.Type: GrantFiled: June 12, 2017Date of Patent: July 7, 2020Assignee: KONICA MINOLTA, INC.Inventors: Masayuki Nakazawa, Keiko Itaya
-
Patent number: 10674514Abstract: A base station device is configured to set, for each communication terminal device, a radio format for signals transmitted to and received from the communication terminal device. The radio format is set for each communication terminal device in accordance with, for example, a type of use including a moving speed of the communication terminal device. The base station device may be configured to change the radio format for the communication terminal device based on the information about a change in the environment of a radio communication between the communication terminal device and the base station device and a change including the communication terminal device's location. The signals transmitted and received between the base station device and the communication terminal device include radio formats in which at least one of a length of a symbol of the signal and a length of a cyclic prefix in an OFDM scheme differs.Type: GrantFiled: October 26, 2015Date of Patent: June 2, 2020Assignee: Mitsubishi Electric CorporationInventors: Masayuki Nakazawa, Kuniyuki Suzuki, Mitsuru Mochizuki, Koji Ono, Takayuki Nonami, Naohito Tomoe, Fumiki Hasegawa