Patents by Inventor Yoshihito Kawai
Yoshihito Kawai 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: 8593976Abstract: It is an object to provide a wireless base station and a terminal equipment capable of shortening the processing time by not requiring the detection of the spatial correlation coefficient, which is required in general technology, and simplifying the selection process for terminal equipments to be connected to each other in a wireless base station that performs spatial multiplexing transmission to a plurality of terminal equipments and a terminal equipment responding for spatial multiplexing transmission. A terminal equipment 12 includes an interference cancellation capability information data maintaining section 20 that maintains interference cancellation capability information data indicating the interference cancellation capability of the terminal equipment 12 and signals the interference cancellation capability information data to a wireless base station 1.Type: GrantFiled: January 25, 2006Date of Patent: November 26, 2013Assignee: Panasonic CorporationInventors: Takaaki Kishigami, Shutai Okamura, Hidekuni Yomo, Yoshihito Kawai
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Patent number: 7577124Abstract: A relay apparatus, terminal apparatus and relay method for relaying signals with a reduced scale of the apparatus, without temporally switching between transmission and reception and with reduced waste of time when relay is performed at the same frequency on a radio communication network on which bidirectional communication is performed. A radio reception section 202 outputs information signals to a switch 208, outputs relay control signals to a demodulation section 204 after subjecting predetermined radio reception processing. The demodulation section 204 demodulates a relay control signal. A relay control signal processing section 206 decides the possibility of relay of information signals and inquires, when the relay is possible, whether the terminal apparatus on the receiving side can receive this information signal or not. Furthermore, the relay control signal processing section 206 connects a switch 208 during the stored relay time.Type: GrantFiled: September 16, 2004Date of Patent: August 18, 2009Assignee: Panasonic CorporationInventors: Hidekuni Yomo, Yoshinori Kunieda, Yuuri Yamamoto, Yoshihito Kawai
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Publication number: 20090016263Abstract: It is an object to provide a wireless base station and a terminal equipment capable of shortening the processing time by not requiring the detection of the spatial correlation coefficient, which is required in general technology, and simplifying the selection process for terminal equipments to be connected to each other in a wireless base station that performs spatial multiplexing transmission to a plurality of terminal equipments and a terminal equipment responding for spatial multiplexing transmission. A terminal equipment 12 includes an interference cancellation capability information data maintaining section 20 that maintains interference cancellation capability information data indicating the interference cancellation capability of the terminal equipment 12 and signals the interference cancellation capability information data to a wireless base station 1.Type: ApplicationFiled: January 25, 2006Publication date: January 15, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Takaaki Kishigami, Shutai Okamura, Hidekuni Yomo, Yoshihito Kawai
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Patent number: 7406140Abstract: A loop interference canceller that carries out an adaptive operation of responding to time variations of the phase or level of loop interference wave or key station wave at high speed and with high accuracy and reduces the size of an apparatus. The loop interference canceller of the present invention limits the number of data pieces of the transmission path characteristic estimation section, realizes expansion to the entire band not through interpolation but through 0 insertion in a frequency domain and windowing after time domain transformation to reduce the number of data pieces processed and speed up the adaptive operation of the loop interference canceller, and can thereby realize high trackability for time variations of the phase and level of loop interference wave or key station wave, increase the accuracy of processing inside, perform high accuracy cancellation operation, reduce the circuit scale and achieve an advantageous effect of realizing miniaturization of the apparatus.Type: GrantFiled: October 6, 2003Date of Patent: July 29, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinori Kunieda, Hidekuni Yomo, Yoshihito Kawai, Kenichiro Hayashi, Kazuaki Suzuki
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Publication number: 20050191961Abstract: A loop interference canceller that carries out an adaptive operation of responding to time variations of the phase or level of loop interference wave or key station wave at high speed and with high accuracy and reduces the size of an apparatus. The loop interference canceller of the present invention limits the number of data pieces of the transmission path characteristic estimation section, realizes expansion to the entire band not through interpolation but through 0 insertion in a frequency domain and windowing after time domain transformation to reduce the number of data pieces processed and speed up the adaptive operation of the loop interference canceller, and can thereby realize high trackability for time variations of the phase and level of loop interference wave or key station wave, increase the accuracy of processing inside, perform high accuracy cancellation operation, reduce the circuit scale and achieve an advantageous effect of realizing miniaturization of the apparatus.Type: ApplicationFiled: October 6, 2003Publication date: September 1, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yoshinori Kunieda, Hidekuni Yomo, Yoshihito Kawai, Kenichiro Hayashi, Kazuaki Suzuki
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Publication number: 20050058104Abstract: A relay apparatus, terminal apparatus and relay method for relaying signals with a reduced scale of the apparatus, without temporally switching between transmission and reception and with reduced waste of time when relay is performed at the same frequency on a radio communication network on which bidirectional communication is performed. A radio reception section 202 outputs information signals to a switch 208, outputs relay control signals to a demodulation section 204 after subjecting predetermined radio reception processing. The demodulation section 204 demodulates a relay control signal. A relay control signal processing section 206 decides the possibility of relay of information signals and inquires, when the relay is possible, whether the terminal apparatus on the receiving side can receive this information signal or not. Furthermore, the relay control signal processing section 206 connects a switch 208 during the stored relay time.Type: ApplicationFiled: September 16, 2004Publication date: March 17, 2005Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Hidekuni Yomo, Yoshinori Kunieda, Yuuri Yamamoto, Yoshihito Kawai
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Patent number: D1025050Type: GrantFiled: September 3, 2021Date of Patent: April 30, 2024Assignee: Lenovo (Singapore) Pte. Ltd.Inventors: Shinnosuke Takahashi, Cuong Truong, Koji Kawai, Yoshihito Nakagaki