Patents by Inventor Satoshi Denno
Satoshi Denno 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: 11818753Abstract: Information indicating a base station apparatus with which each of a terminal apparatus T-k and other terminal apparatuses that are to perform location registration in a service area of a base station apparatus B(k) with which the terminal apparatus T-k is to perform location registration is shared among all the terminal apparatuses that are to perform location registration in the service area. A maximum wait time is set longer, the greater the number of other terminal apparatuses that are scheduled to perform location registration with the base station apparatus B(k) with respect to which the terminal apparatus T-k is to perform location registration is, the maximum wait time being a maximum wait time for the terminal apparatus T-K to access the base station apparatus B(k).Type: GrantFiled: July 11, 2019Date of Patent: November 14, 2023Assignee: NTT DOCOMO, INC.Inventors: Kazuoki Ichikawa, Takashi Okada, Yuuta Higuchi, Satoshi Denno
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Publication number: 20210282177Abstract: Information indicating a base station apparatus with which each of a terminal apparatus T-k and other terminal apparatuses that are to perform location registration in a service area of a base station apparatus B(k) with which the terminal apparatus T-k is to perform location registration is shared among all the terminal apparatuses that are to perform location registration in the service area. A maximum wait time is set longer, the greater the number of other terminal apparatuses that are scheduled to perform location registration with the base station apparatus B(k) with respect to which the terminal apparatus T-k is to perform location registration is, the maximum wait time being a maximum wait time for the terminal apparatus T-K to access the base station apparatus B(k).Type: ApplicationFiled: July 11, 2019Publication date: September 9, 2021Applicant: NTT DOCOMO, INC.Inventors: Kazuoki ICHIKAWA, Takashi OKADA, Yuuta HIGUCHI, Satoshi DENNO
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Patent number: 7016437Abstract: A signal extraction method is provided. In the method, signals are extracted by using K beam forming parts, wherein K is a natural number equal to or more than 2, and received signals from a plurality of antennas are applied to each beam forming part. The method includes the steps of: the received signals being processed by each beam forming part successively; a first beam forming part extracting a first signal from the received signals; and a kth beam forming part canceling, from the received signals, signal components which are extracted by beam forming parts from the first beam forming part to a (k?1)th beam forming part so as to extract a kth signal, wherein 2?k?K.Type: GrantFiled: September 14, 2001Date of Patent: March 21, 2006Assignee: NTT DoCoMo, Inc.Inventor: Satoshi Denno
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Patent number: 6993064Abstract: A receiver is provided, in which the receiver includes K signal extraction parts, a signal estimation part, K joint probability calculation parts and a multiplying part, wherein: an ith (1?i?K) signal extraction part extracts ith to Kth user signals; an ith joint probability calculation part calculates a joint probability density function that any signal set in the ith to Kth user signals will be obtained if ith to Kth user signals estimated by the signal estimation part are assumed to be received; the multiplying part multiplies probability density functions calculated by the joint probability calculation parts; and the signal estimation part estimates first to Kth user signals which maximize the multiplied value, and outputs the first to Kth user signals.Type: GrantFiled: December 28, 2001Date of Patent: January 31, 2006Assignee: NTT DoCoMo, Inc.Inventor: Satoshi Denno
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Patent number: 6987815Abstract: A receive method in a communication system is provided. The method includes the steps of: generating a quadrature signal from the receive signal; compensating orthogonality error and gain imbalance for the receive signal and the quadrature signal; and converting the receive signal and the quadrature signal into first complex frequency band signal by first analytic sine wave.Type: GrantFiled: June 22, 2001Date of Patent: January 17, 2006Assignee: NTT DoCoMo, Inc.Inventor: Satoshi Denno
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Publication number: 20030152159Abstract: The communication system carries out signal processing adapted for transmission-channel characteristics. In the communication system, a right transmitter detects a transmission-signal-characteristics-correcting coefficient sent from a left receiver and corrects, according to the transmission-signal-characteristics-correcting coefficient, at least one of a transfer function and a spatial frequency characteristic of a transmission signal. The left receiver computes the transmission-signal-characteristics-correcting coefficient and a reception-signal-characteristics-correcting coefficient through the processes of detecting correlation of a reception signal, and carrying out eigenvalue decomposition on a product matrix obtained by multiplying a correlation matrix having the detected correlation as elements and a transported matrix of the correlation matrix together.Type: ApplicationFiled: November 8, 2002Publication date: August 14, 2003Applicant: NTT DoCoMo, Inc.Inventor: Satoshi Denno
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Publication number: 20030101411Abstract: A decoding method, wherein N first signals are generated by decoding, through a decoding part including K (K≧N) stages of decoding subparts, K second signals obtained by encoding the N first signals.Type: ApplicationFiled: November 12, 2002Publication date: May 29, 2003Applicant: NTT DoCoMo, Inc.Inventor: Satoshi Denno
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Publication number: 20020126779Abstract: A receiver is provided, in which the receiver includes K signal extraction parts, a signal estimation part, K joint probability calculation parts and a multiplying part, wherein: an ith (1≦i≦K) signal extraction part extracts ith to Kth user signals; an ith joint probability calculation part calculates a joint probability density function that any signal set in the ith to Kth user signals will be obtained if ith to Kth user signals estimated by the signal estimation part are assumed to be received; the multiplying part multiplies probability density functions calculated by the joint probability calculation parts; and the signal estimation part estimates first to Kth user signals which maximize the multiplied value, and outputs the first to Kth user signals.Type: ApplicationFiled: December 28, 2001Publication date: September 12, 2002Applicant: NTT DoCoMo, Inc.Inventor: Satoshi Denno
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Publication number: 20020057752Abstract: A receive method in a communication system is provided. The method includes the steps of: generating a quadrature signal from the receive signal; compensating orthogonality error and gain imbalance for the receive signal and the quadrature signal; and converting the receive signal and the quadrature signal into first complex frequency band signal by first analytic sine wave.Type: ApplicationFiled: June 22, 2001Publication date: May 16, 2002Applicant: NTT DoCoMo, Inc.Inventor: Satoshi Denno
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Publication number: 20020044615Abstract: A signal extraction method is provided. In the method, signals are extracted by using K beam forming parts, wherein K is a natural number equal to or more than 2, and received signals from a plurality of antennas are applied to each beam forming part. The method includes the steps of: the received signals being processed by each beam forming part successively; a first beam forming part extracting a first signal from the received signals; and a kth beam forming part canceling, from the received signals, signal components which are extracted by beam forming parts from the first beam forming part to a (k−1)th beam forming part so as to extract a kth signal, wherein 2≦k≦K.Type: ApplicationFiled: September 14, 2001Publication date: April 18, 2002Applicant: NTT DoCoMo, IncInventor: Satoshi Denno
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Patent number: 5287067Abstract: A method and an apparatus for demodulation with adaptive phase control in quasi-coherent detection, capable of compensating detection phase error due to the initial phase error and the frequency error at high speed and high quality, without a complicated circuit configuration and a significant delay. In the apparatus, a frequency error in the modulated complex input signals is estimated by using a phase variation during one symbol due to the frequency error according to the modulated complex input signals and the demodulated complex signals for present and immediately previous symbols; an initial phase error in the modulated complex input signals is estimated according to the modulated complex input signals, the demodulated complex signals, and the estimated frequency error; and the demodulated complex signals are obtained by applying optimum phase compensation determined according to the estimated frequency error and the estimated initial phase error, to the modulated complex input signals.Type: GrantFiled: October 6, 1992Date of Patent: February 15, 1994Assignee: Nippon Telegraph and Telephone CorporationInventors: Satoshi Denno, Yoichi Saito