Patents by Inventor Kenichi Murayama
Kenichi Murayama 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: 10771132Abstract: Disclosed is a MIMO system including a transmitter and a receiver, in which an overall BER characteristic is improved. The transmitter (1) maps data, distributed among transmit antennas, onto an IQ plane to generate carrier symbols, and then, applies an inter-polarization interleave processing in a time direction to the carrier symbols between the transmit antennas, to generate OFDM signals. Receiving the OFDM signals, the receiver (2) demodulates the OFDM signals to generate complex baseband signals, and after that, applies a first deinterleave processing in a time direction to the complex baseband signals to generate time deinterleaved data. Further, the receiver (2) applies a MIMO separation processing to the time deinterleaved data to generate a plurality of sets of MIMO separated data and applies a second deinterleave processing between the receive antennas to the plurality of sets of MIMO separated data, so as to generate carrier symbols.Type: GrantFiled: February 9, 2016Date of Patent: September 8, 2020Assignees: NIPPON HOSO KYOKAI, NHK Engineering System, Inc.Inventors: Shingo Asakura, Madoka Honda, Kenichi Murayama, Takuya Shitomi, Susumu Saito, Yoshikazu Narikiyo, Hiroaki Miyasaka, Akihiko Satou, Tomoaki Takeuchi, Kenichi Tsuchida, Masahiro Okano, Masayuki Takada, Kazuhiko Shibuya
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Patent number: 10009078Abstract: Disclosed is a MIMO system including a transmitter and a receiver, in which an overall BER characteristic is improved. The transmitter (1) maps data, distributed among transmit antennas, onto an IQ plane to generate carrier symbols, and then, applies an inter-polarization interleave processing in a time direction to the carrier symbols between the transmit antennas, to generate OFDM signals. Receiving the OFDM signals, the receiver (2) demodulates the OFDM signals to generate complex baseband signals, and after that, applies a first deinterleave processing in a time direction to the complex baseband signals to generate time deinterleaved data. Further, the receiver (2) applies a MIMO separation processing to the time deinterleaved data to generate a plurality of sets of MIMO separated data and applies a second deinterleave processing between the receive antennas to the plurality of sets of MIMO separated data, so as to generate carrier symbols.Type: GrantFiled: February 9, 2016Date of Patent: June 26, 2018Assignees: NIPPON HOSO KYOKAI, NHK Engineering System, Inc.Inventors: Shingo Asakura, Madoka Honda, Kenichi Murayama, Takuya Shitomi, Susumu Saito, Yoshikazu Narikiyo, Hiroaki Miyasaka, Akihiko Satou, Tomoaki Takeuchi, Kenichi Tsuchida, Masahiro Okano, Masayuki Takada, Kazuhiko Shibuya
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Publication number: 20180038942Abstract: Disclosed is a MIMO system including a transmitter and a receiver, in which an overall BER characteristic is improved. The transmitter (1) maps data, distributed among transmit antennas, onto an IQ plane to generate carrier symbols, and then, applies an inter-polarization interleave processing in a time direction to the carrier symbols between the transmit antennas, to generate OFDM signals. Receiving the OFDM signals, the receiver (2) demodulates the OFDM signals to generate complex baseband signals, and after that, applies a first deinterleave processing in a time direction to the complex baseband signals to generate time deinterleaved data. Further, the receiver (2) applies a MIMO separation processing to the time deinterleaved data to generate a plurality of sets of MIMO separated data and applies a second deinterleave processing between the receive antennas to the plurality of sets of MIMO separated data, so as to generate carrier symbols.Type: ApplicationFiled: February 9, 2016Publication date: February 8, 2018Applicants: NIPPON HOSO KYOKAI, NHK Engineering System, Inc.Inventors: Shingo ASAKURA, Madoka HONDA, Kenichi MURAYAMA, Takuya SHITOMI, Susumu SAITO, Yoshikazu NARIKIYO, Hiroaki MIYASAKA, Akihiko SATOU, Tomoaki TAKEUCHI, Kenichi TSUCHIDA, Masahiro OKANO, Masayuki TAKADA, Kazuhiko SHIBUYA
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Publication number: 20180034521Abstract: Disclosed is a MIMO system including a transmitter and a receiver, in which an overall BER characteristic is improved. The transmitter (1) maps data, distributed among transmit antennas, onto an IQ plane to generate carrier symbols, and then, applies an inter-polarization interleave processing in a time direction to the carrier symbols between the transmit antennas, to generate OFDM signals. Receiving the OFDM signals, the receiver (2) demodulates the OFDM signals to generate complex baseband signals, and after that, applies a first deinterleave processing in a time direction to the complex baseband signals to generate time deinterleaved data. Further, the receiver (2) applies a MIMO separation processing to the time deinterleaved data to generate a plurality of sets of MIMO separated data and applies a second deinterleave processing between the receive antennas to the plurality of sets of MIMO separated data, so as to generate carrier symbols.Type: ApplicationFiled: February 9, 2016Publication date: February 1, 2018Applicants: NIPPON HOSO KYOKAI, NHK Engineering System, Inc.Inventors: Shingo ASAKURA, Madoka HONDA, Kenichi MURAYAMA, Takuya SHITOMI, Susumu SAITO, Yoshikazu NARIKIYO, Hiroaki MIYASAKA, Akihiko SATOU, Tomoaki TAKEUCHI, Kenichi TSUCHIDA, Masahiro OKANO, Masayuki TAKADA, Kazuhiko SHIBUYA
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Patent number: 9650075Abstract: A vehicle front section structure includes a front side member including an inner wall and an outer wall facing each other in a vehicle width direction; a load receiving section that is provided or formed at a vehicle front-rear direction front end portion of the front side member, and that receives load; and a weakened portion that is formed at least in the inner wall and the outer wall, at a location that is rear side in a vehicle front-rear direction of the front side member than the load receiving section, and that has lower rigidity than the rigidity of other locations in the front side member.Type: GrantFiled: October 21, 2015Date of Patent: May 16, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kenichi Murayama
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Patent number: 9555756Abstract: A vehicle front structure includes: a pair of right and left front side members extending in the vehicle front-rear direction; load receiving members each projecting from a corresponding one of the front side members outward in the vehicle-width direction, having an outer side surface in the vehicle-width direction, which is tilted inward in the vehicle-width direction from the vehicle front side toward the vehicle rear side; and protruding members each disposed forward of a corresponding one of the load receiving members in the vehicle front-rear direction, each protruding forward in the vehicle front-rear direction, and each having a front end portion and a rear end portion, the rear end portion being fixed at a position at which at least a part of the protruding member overlaps with the corresponding load receiving member in a front view of the vehicle, and the front end portion being a free end.Type: GrantFiled: August 4, 2015Date of Patent: January 31, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Chitoshi Sugano, Yasunori Iwamoto, Kenichi Murayama
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Publication number: 20160121934Abstract: A vehicle front section structure includes a front side member including an inner wall and an outer wall facing each other in a vehicle width direction; a load receiving section that is provided or formed at a vehicle front-rear direction front end portion of the front side member, and that receives load; and a weakened portion that is formed at least in the inner wall and the outer wall, at a location that is rear side in a vehicle front-rear direction of the front side member than the load receiving section, and that has lower rigidity than the rigidity of other locations in the front side member.Type: ApplicationFiled: October 21, 2015Publication date: May 5, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kenichi MURAYAMA
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Publication number: 20160039374Abstract: A vehicle front structure includes: a pair of right and left front side members extending in the vehicle front-rear direction; load receiving members each projecting from a corresponding one of the front side members outward in the vehicle-width direction, having an outer side surface in the vehicle-width direction, which is tilted inward in the vehicle-width direction from the vehicle front side toward the vehicle rear side; and protruding members each disposed forward of a corresponding one of the load receiving members in the vehicle front-rear direction, each protruding forward in the vehicle front-rear direction, and each having a front end portion and a rear end portion, the rear end portion being fixed at a position at which at least a part of the protruding member overlaps with the corresponding load receiving member in a front view of the vehicle, and the front end portion being a free end.Type: ApplicationFiled: August 4, 2015Publication date: February 11, 2016Applicant: Toyota Jidosha Kabushiki KaishaInventors: Chitoshi SUGANO, Yasunori IWAMOTO, Kenichi MURAYAMA
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Publication number: 20150103944Abstract: A transmission apparatus configured to transmit four OFDM signals from four transmission antennas includes: a pilot signal insertion unit configured to generate four types of OFDM symbols by inserting pilot signals of different patterns into four types of transmission signals; and an OFDM signal generation unit configured to generate four OFDM signals by modulating respective carriers of the four types of OFDM symbols.Type: ApplicationFiled: October 11, 2013Publication date: April 16, 2015Applicant: NIPPON HOSO KYOKAIInventors: Takuya SHITOMI, Kenichi MURAYAMA, Makoto TAGUCHI, Shingo ASAKURA, Kazuhiko SHIBUYA
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Publication number: 20140321575Abstract: In a MIMO system performing MIMO transmission using a plurality of antennas, BER characteristics are improved. A transmission device includes a mapping unit that maps a transmission signal onto the IQ plane to generate carrier-modulated carrier symbols, a frequency/transmit antenna interleaving unit (frequency/polarized wave interleaving unit) that interleaves the carrier symbols in the frequency domain and between transmit antennas to generate interleaved data for each transmit antenna, and an output processing unit that constructs an OFDM frame for the interleaved data for each transmit antenna and transmits an OFDM signal via the transmit antennas.Type: ApplicationFiled: November 16, 2012Publication date: October 30, 2014Inventors: Shingo Asakura, Kenichi Murayama, Makoto Taguchi, Takuya Shitomi, Kazuhiko Shibuya
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Patent number: 8017232Abstract: Provided is a pressure-sensitive adhesive composition for a plasma display in which a moire phenomenon can be prevented without disposing an anti-glare film and the like in order to decrease a thickness of an optical filter in a plasma display, improve a productivity of the optical filter and reduce a cost thereof and an adhesive sheet prepared by forming the same. The pressure-sensitive adhesive composition used for an optical filter of a plasma display comprises (A) a (meth)acrylic ester base copolymer having a cross-linkable functional group in a molecule, (B) a cross-linking agent and (C) an organic fine particle in which a difference in a refractive index from that of the above (meth)acrylic ester base copolymer is 0.03 or more and which has an average particle diameter of 1 to 15 ?m and an adhesive sheet prepared by forming the same.Type: GrantFiled: March 25, 2009Date of Patent: September 13, 2011Assignee: Lintec CorporationInventors: Kenichi Murayama, Satoru Shoshi
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Publication number: 20090246509Abstract: Provided is an optical laminate for a plasma display in which a moire phenomenon can be prevented without disposing an anti-glare film and the like in order to decrease a thickness of an optical filter in a plasma display, improve a productivity of the optical filter and reduce a cost thereof. The optical laminate used for an optical filter of a plasma display comprises an electromagnetic-wave shielding film having a metal mesh and a contrast enhancing film, wherein a light diffusion pressure-sensitive adhesive layer containing organic fine particles is disposed on a surface of at least one of the electromagnetic-wave shielding film and the contrast enhancing film.Type: ApplicationFiled: March 25, 2009Publication date: October 1, 2009Applicant: LINTEC CORPORATIONInventors: Kenichi MURAYAMA, Satoru Shoshi
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Publication number: 20090246516Abstract: Provided is a pressure-sensitive adhesive composition for a plasma display in which a moire phenomenon can be prevented without disposing an anti-glare film and the like in order to decrease a thickness of an optical filter in a plasma display, improve a productivity of the optical filter and reduce a cost thereof and an adhesive sheet prepared by forming the same. The pressure-sensitive adhesive composition used for an optical filter of a plasma display comprises (A) a (meth)acrylic ester base copolymer having a cross-linkable functional group in a molecule, (B) a cross-linking agent and (C) an organic fine particle in which a difference in a refractive index from that of the above (meth)acrylic ester base copolymer is 0.03 or more and which has an average particle diameter of 1 to 15 ?m and an adhesive sheet prepared by forming the same.Type: ApplicationFiled: March 25, 2009Publication date: October 1, 2009Applicant: LINTEC CORPORATIONInventors: Kenichi MURAYAMA, Satoru SHOSHI
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Publication number: 20040142728Abstract: The present invention relates to a radio server system. The communications service area of this radio server system is made of a plurality of zones and the radio server system connects to the Internet via a radio server in which a mobile radio is connected to a base station radio by carrying out data communications between base station radios in each of the zones and a plurality of mobile radios such that the base station radio continuously sends data and the mobile radio sends a burst signal to the base station radio, wherein the base station radio communicates using a single frequency that is different from the frequency used by neighboring base station radios, and each mobile radio detects the frequency used by the base station radio in the base station radio's zone and communicates with the base station radio using the detected frequency.Type: ApplicationFiled: January 13, 2004Publication date: July 22, 2004Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuyoshi Tari, Hiroyuki Unoki, Kenichi Murayama, Kenzo Nakamura, Takao Yokoshima
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Publication number: 20040142727Abstract: The present invention relates to a radio server system. The communications service area of this radio server system is made of a plurality of zones and the radio server system connects to the Internet via a radio server in which a mobile radio is connected to a base station radio by carrying out data communications between base station radios in each of the zones and a plurality of mobile radios such that the base station radio continuously sends data and the mobile radio sends a burst signal to the base station radio, wherein the base station radio communicates using a single frequency that is different from the frequency used by neighboring base station radios, and each mobile radio detects the frequency used by the base station radio in the base station radio's zone and communicates with the base station radio using the detected frequency.Type: ApplicationFiled: January 13, 2004Publication date: July 22, 2004Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuyoshi Tari, Hiroyuki Unoki, Kenichi Murayama, Kenzo Nakamura, Takao Yokoshima
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Patent number: 6542491Abstract: A wireless server system and method for communicating between a user terminal and Internet a wirelessly. It is based on a user terminal having a fixed terminal and a terminal unit so that an Internet connection can be made by way of the terminal unit to an appropriate wireless server. The system has at least one wireless server connected to Internet; and a plurality of wireless station devices connected to the wireless server, and the system communicates wirelessly with the terminal unit of the user terminal; wherein one wireless server within a district of communication range of the wireless station devices is designated as a home server for the terminal unit, and the fixed terminal receives data sent wirelessly from Internet by way of the terminal unit.Type: GrantFiled: September 16, 1999Date of Patent: April 1, 2003Assignee: Mitsubishi Materials CorporationInventors: Kazuyoshi Tari, Tumoru Nagira, Hiroyuki Unoki, Kenichi Murayama