Patents by Inventor Noriyoshi Terada
Noriyoshi Terada 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: 7373129Abstract: A radio communication terminal disposed in close proximity to or built in electronic equipment is provided with a receiver connected to a receiving antenna and an interference canceller for removing from a received signal a radiated noise component from the electronic equipment received by the receiving antenna. The interference canceller includes a radiated noise predictor which predicts the radiated noise component in the received signal based on the radiated noise from the electronic equipment and generates a pseudo interference signal accordingly, and an adder which cancels the radiated noise component in the received signal by the pseudo interference signal.Type: GrantFiled: January 29, 2004Date of Patent: May 13, 2008Assignee: NTT DoCoMo, Inc.Inventors: Atsushi Fukuda, Yoshiaki Tarusawa, Noriyoshi Terada
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Patent number: 7327996Abstract: The invention relates to a high sensitivity receiver installed outdoors which may be used in a base station of a mobile communication system, for example. A received radio frequency signal is converted into a signal in a desired frequency band by a reception bandpass filter RXF3, is subject to a low noise amplification to a desired level by a low noise reception amplifier LNA4, and the amplified signal is converted into an optical signal by a laser diode LD5. RXF3, LNA4 and LD5 are confined in a heat shielding box. LD5 is cooled by cooling means to the order of critical temperature where RXF3, for example, assumes a superconducting state, whereby the dynamic range is increased and stabilized.Type: GrantFiled: December 2, 2003Date of Patent: February 5, 2008Assignee: NTT DoCoMo, Inc.Inventors: Ning Chen, Yoshiaki Tarusawa, Kei Satoh, Shoichi Narahashi, Noriyoshi Terada, Toshio Nojima
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Patent number: 7227906Abstract: Different carrier frequencies are chosen for plural transmitters of a transmitting device and signals are transmitted at frequency bands overlapping each other. In the receiving device weighting coefficients are provided in input-to-output paths of an interchannel interference canceller 21 so that the cross correlation between output signals from the interchannel interference canceller is minimized.Type: GrantFiled: December 11, 2002Date of Patent: June 5, 2007Assignee: NTT DoCoMo, Inc.Inventors: Atsushi Fukuda, Yasunori Suzuki, Noriyoshi Terada, Toshio Nojima
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Patent number: 7203469Abstract: To provide a super directional gain in a multi-element array antenna. An array antenna comprising a plurality of antenna elements A-1–A-4 spaced at intervals (equal to or less than a quarter of a wavelength) that provides a supergain is used. A weight generator circuit generates weight data in accordance with phase difference and amplitude difference among the antenna elements A-1–A-4 and directivity data of each of the antenna elements A-1–A-4. The generated weight data is used to weight each of the antenna elements A-1–A-4.Type: GrantFiled: December 6, 2002Date of Patent: April 10, 2007Assignee: NTT DoCoMo, Inc.Inventors: Ryo Yamaguchi, Noriyoshi Terada, Toshio Nojima
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Patent number: 7032600Abstract: A system for measuring the position of an in vivo radio device is disclosed. The system comprises the in vivo radio device administered into a living organism, a plurality of ex vivo radio devices disposed outside of the living organism, and a position measuring device. The in vivo radio device includes a transmitter for transmitting a vital information signal or a position measuring signal. Each of the ex vivo radio devices includes a receiver for receiving the vital information signal or the position measuring signal. The position measuring device includes a position measuring unit for measuring the position of the in vivo radio device based on receiving characteristics of the vital information signal or the position measuring signal received by the ex vivo radio devices.Type: GrantFiled: January 16, 2004Date of Patent: April 25, 2006Assignee: NTT DoCoMo, Inc.Inventors: Atsushi Fukuda, Yoshiaki Tarusawa, Noriyoshi Terada
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Patent number: 6907269Abstract: A mobile communication base station determines the oncoming direction of a radio wave with a simple arrangement and transmits a narrow angle beam in this direction. Received signals from a pair of wide angle beam antennae 21-1 and 21-2 having an equal configuration and a common orientation and which are located close to each other are fed to a direction finder receiver 22 and a communication receiver 15. By utilizing the fact that the both received signals have a coincident amplitude, a phase difference between the received signals is detected. The oncoming direction of the received radio wave (or the direction of a mobile station) is determined on the basis of the phase difference. A beam switcher 12 is controlled so as to connect a transmitter 13 to a narrow angle beam antenna (one of 11-1 to 11-4) which is directed in the oncoming direction thus determined.Type: GrantFiled: October 2, 2001Date of Patent: June 14, 2005Assignee: NTT DoCoMo, Inc.Inventors: Ryo Yamaguchi, Noriyoshi Terada, Toshio Nojima
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Publication number: 20040210131Abstract: A system for measuring the position of an in vivo radio device is disclosed. The system comprises the in vivo radio device administered into a living organism, a plurality of ex vivo radio devices disposed outside of the living organism, and a position measuring device. The in vivo radio device includes a transmitter for transmitting a vital information signal or a position measuring signal. Each of the ex vivo radio devices includes a receiver for receiving the vital information signal or the position measuring signal. The position measuring device includes a position measuring unit for measuring the position of the in vivo radio device based on receiving characteristics of the vital information signal or the position measuring signal received by the ex vivo radio devices.Type: ApplicationFiled: January 16, 2004Publication date: October 21, 2004Applicant: NTT DoCoMo, Inc.Inventors: Atsushi Fukuda, Yoshiaki Tarusawa, Noriyoshi Terada
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Publication number: 20040185815Abstract: A radio communication terminal disposed in close proximity to or built in electronic equipment is provided with a receiver connected to a receiving antenna and an interference canceller for removing from a received signal a radiated noise component from the electronic equipment received by the receiving antenna. The interference canceller includes a radiated noise predictor which predicts the radiated noise component in the received signal based on the radiated noise from the electronic equipment and generates a pseudo interference signal accordingly, and an adder which cancels the radiated noise component in the received signal by the pseudo interference signal.Type: ApplicationFiled: January 29, 2004Publication date: September 23, 2004Applicant: NTT DoCoMo, Inc.Inventors: Atsushi Fukuda, Yoshiaki Tarusawa, Noriyoshi Terada
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Publication number: 20040162042Abstract: The invention relates to a high sensitivity receiver installed outdoors which may be used in a base station of a mobile communication system, for example. A received radio frequency signal is converted into a signal in a desired frequency band by a reception bandpass filter RXF3, is subject to a low noise amplification to a desired level by a low noise reception amplifier LNA4, and the amplified signal is converted into an optical signal by a laser diode LD5. RXF3, LNA4 and LD5 are confined in a heat shielding box. LD5 is cooled by cooling means to the order of critical temperature where RXF3, for example, assumes a superconducting state, whereby the dynamic range is increased and stabilized.Type: ApplicationFiled: December 2, 2003Publication date: August 19, 2004Applicant: NTT DoCoMo, Inc.Inventors: Ning Chen, Yoshiaki Tarusawa, Kei Satoh, Shoichi Narahashi, Noriyoshi Terada, Toshio Nojima
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Publication number: 20040009793Abstract: To provide a super directional gain in a multi-element array antenna. An array antenna comprising a plurality of antenna elements A-1-A-4 spaced at intervals (equal to or less than a quarter of a wavelength) that provides a supergain is used. A weight generator circuit generates weight data in accordance with phase difference and amplitude difference among the antenna elements A-1-A-4 and directivity data of each of the antenna elements A-1-A-4. The generated weight data is used to weight each of the antenna elements A-1-A-4.Type: ApplicationFiled: December 6, 2002Publication date: January 15, 2004Applicant: NTT DoCoMo, Inc.Inventors: Ryo Yamaguchi, Noriyoshi Terada, Toshio Nojima
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Publication number: 20030123565Abstract: Different carrier frequencies are chosen for plural transmitters of a transmitting device and signals are transmitted at frequency bands overlapping each other. In the receiving device weighting coefficients are provided in input-to-output paths of an interchannel interference canceller 21 so that the cross correlation between output signals from the interchannel interference canceller is minimized.Type: ApplicationFiled: December 11, 2002Publication date: July 3, 2003Applicant: NTT DoCoMo, Inc.Inventors: Atsushi Fukuda, Yasunori Suzuki, Noriyoshi Terada, Toshio Nojima
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Publication number: 20020039912Abstract: A mobile communication base station determines the oncoming direction of a radio wave with a simple arrangement and transmits a narrow angle beam in this direction. Received signals from a pair of wide angle beam antennae 21-1 and 21-2 having an equal configuration and a common orientation and which are located close to each other are fed to a direction finder receiver 22 and a communication receiver 15. By utilizing the fact that the both received signals have a coincident amplitude, a phase difference between the received signals is detected. The oncoming direction of the received radio wave (or the direction of a mobile station) is determined on the basis of the phase difference. A beam switcher 12 is controlled so as to connect a transmitter 13 to a narrow angle beam antenna (one of 11-1 to 11-4) which is directed in the oncoming direction thus determined.Type: ApplicationFiled: October 2, 2001Publication date: April 4, 2002Applicant: NTT DoCoMo, Inc.Inventors: Ryo Yamaguchi, Noriyoshi Terada, Toshio Nojima