Patents by Inventor Tsuyoshi Kogawa
Tsuyoshi Kogawa 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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Publication number: 20120231756Abstract: A receiving apparatus includes a variable gain unit to change between a first gain and a smaller second gain, and to amplify a received signal to obtain an amplified signal; a comparator to compare a power of the amplified signal with a reference value; and a controller to set a gain to the first gain while in a standby state, to reset a gain to a third gain between the first and second gains if in a standby state the power of the received signal is larger than the reference value, and then to set a gain to the first gain and return to the standby state if the power is equal to or lower than the reference value, or if not, to a fourth gain between the first and third gains.Type: ApplicationFiled: March 9, 2012Publication date: September 13, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shoji Otaka, Tsuyoshi Kogawa, Koji Ogura, Toshiyuki Umeda, Takafumi Sakamoto, Fumi Moritsuka, Hiroaki Ishihara
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Publication number: 20120219092Abstract: According to one embodiment, a communication device, which performs communication using a first communication method and a second communication method, converts information to be transmitted into information for forming a pulse that is formed depending on the presence and absence of transmission of a radio wave, according to the first communication method. The communication device decides a suppression time, during which communication with a communication device other than a communication partner is suppressed, on the basis of a result of the conversion. The communication device generates an output signal including the transmission suppression signal, in which the suppression time is set for each first element in the pulse, according to the second communication method, the first element transmitting a radio wave. The communication device transmits a radio wave according to the output signal to the communication partner at timing to transmit a radio wave in the pulse.Type: ApplicationFiled: September 18, 2011Publication date: August 30, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takeshi ISHIHARA, Tsuyoshi Kogawa, Eiji Kamagata, Takafumi Sakamoto, Koji Ogura
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Publication number: 20120208482Abstract: According to one embodiment, a receiving apparatus includes a variable gain amplifier, comparator, and signal processor. The comparator compares a signal level of the second signal with a first threshold to generate a third signal, a signal level of the third signal being set to a high signal if the signal level of the second signal is greater than the first threshold. The signal processor determines presence of a signal if a rate of high signals in third signals for a period is greater than a second threshold. The second threshold is set to a first value when the control of the gain is performed and set to a second value when the demodulation processing is performed. The first value is greater than the second value.Type: ApplicationFiled: February 10, 2012Publication date: August 16, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsuyoshi KOGAWA, Koji OGURA, Shoji OTAKA, Hiroaki ISHIHARA
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Patent number: 8175187Abstract: A wireless communication apparatus for performing communication using a first communication scheme which transmits a signal using amplitude shift keying and a second communication scheme which suppresses communication with others except a communication counterpart by transmitting a transmission suppression signal before communication is started. The apparatus includes: a first signal generation unit configured to generate transmission data; a modulation unit configured to generate first and second signals having different amplitudes by amplitude-shift keying the transmission data; a second signal generation unit configured to generate the transmission suppression signal having a signal length corresponding to that of the first signal; and a transmission unit configured to transmit the transmission suppression signal at the timing when the first signal is transmitted.Type: GrantFiled: September 15, 2009Date of Patent: May 8, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Tsuyoshi Kogawa, Kiyoshi Toshimitsu, Takafumi Sakamoto, Koji Ogura, Shoji Otaka, Toshiyuki Umeda
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Publication number: 20120063535Abstract: According to one embodiment, a transmitting apparatus includes a generation unit, a division unit, an imparting unit and a transmitting unit. The generation unit generates first control information in accordance with a first information format. The division unit divides the first control information into control information pieces in accordance with information format divisions into which the first information format is divided and which include respective pointer regions, each of the information format divisions having a same data length as a second information format. The imparting unit imparts, to the pointer region of each of the information format divisions, a pointer indicating a wireless communication resource used to transmit one of the control information pieces corresponding to one of the information format divisions other than the each control information format division. The transmitting unit transmits the control information pieces.Type: ApplicationFiled: September 13, 2011Publication date: March 15, 2012Inventors: Ren Sakata, Tsuyoshi Kogawa, Kaoru Inoue, Koichiro Ban, Noritaka Deguchi, Takahiro Kobayashi
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Publication number: 20120034875Abstract: A radio apparatus capable of correcting a direct current offset with high accuracy in a short time is provided. A radio apparatus according to an embodiment includes a first amplifier amplifying a signal inputted to an input terminal with amplification gain determined by a variable resistor to generate a first amplified signal, and a second amplifier amplifying the first amplified signal to generate a second amplified signal. Further, the radio apparatus includes a first correcting unit correcting a direct current offset of the first amplifier, and a second correcting unit correcting a direct current offset of the second amplifier.Type: ApplicationFiled: March 21, 2011Publication date: February 9, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Fumi MORITSUKA, Shoji Otaka, Masahiro Hosoya, Hiroaki Ishihara, Tsuyoshi Kogawa
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Patent number: 8085069Abstract: A starting apparatus includes: a storage unit storing an identifier; a rectifying unit rectifying a reception signal; a generating unit comparing the reception signal rectified in the rectifying unit to a reference signal and generating a digital signal from the reception signal; a judging unit judging whether or not the digital signal contains information of the identifier; a reference changing unit changing the reference signal when the judging unit judges that the reception signal does not contain information of the identifier; and a start instructing unit instructing start of an electric appliance when the judging unit judges that the reception signal contains information of the identifier.Type: GrantFiled: September 16, 2009Date of Patent: December 27, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Shoji Otaka, Toshiyuki Umeda, Shigeyasu Iwata, Takafumi Sakamoto, Tsuyoshi Kogawa, Koji Ogura, Makoto Tsuruta, Yu Kaneko, Nobuhiko Sugasawa
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Patent number: 8054899Abstract: A terminal apparatus including a block generation unit, a transmission timing calculation unit, and a transmission unit. The block generation unit generates a block that includes a plurality of symbols being temporally consecutive and one or more repetition symbols added to a head end of the symbols. The transmission timing calculation unit calculates a transmission timing at which the block is to be transmitted to an external apparatus according to a symbol rate of the block and a number of extended repetition symbols included in the block. The transmission unit transmits the block to the external apparatus at the transmission timing calculated by the transmission timing calculation unit.Type: GrantFiled: June 23, 2008Date of Patent: November 8, 2011Assignee: Kabushiki Kaisha ToshibaInventor: Tsuyoshi Kogawa
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Publication number: 20110268005Abstract: According to one embodiment, a mobile wireless terminal, which makes a wireless communication with a base station accommodated in a network, includes a receiver, a communication module, and a controller. The receiver is configured to receive and frequency-convert a wireless signal transmitted from the base station, and to detect a beacon signal transmitted from the base station based on a reception signal obtained by the frequency conversion. The communication module is configured to receive a wireless signal transmitted from the base station, to acquire identification information of the base station by decoding a reception signal obtained from the wireless signal, and to communicate with the base station. The controller is configured to activate the communication module in accordance with a reception result of the beacon signal by the receiver, and to control the communication module to acquire identification information from the base station.Type: ApplicationFiled: July 8, 2011Publication date: November 3, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kengo KUROSE, Takashi MINEMURA, Tsuyoshi KOGAWA
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Publication number: 20110243269Abstract: The transmitter includes a first bit generator, a modulator, a second bit generator and a bit converter. The first bit generator generates bits to be transmitted based on the first wireless scheme. The modulator for the first wireless scheme performs at least amplitude modulation of a multiple level on the bits generated by the first bit generator. The second bit generator generates a bit to be transmitted based on the second wireless scheme. The bit converter converts the bit generated by the second bit generator and inputs converted bits to the modulator wherein the bit converter converts the bit generated by the second bit generator so that a signal showing High in the second wireless scheme is modulated to amplitude of a high level in the multiple level in the modulator.Type: ApplicationFiled: September 13, 2010Publication date: October 6, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsuyoshi Kogawa, Koji Akita, Koji Ogura, Takafumi Sakamoto
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Publication number: 20100231431Abstract: An electronic system includes: an AC-DC converter to convert an AC voltage into a DC voltage and to supply the DC voltage to a secondary battery; a first detector to detect a remaining amount of the secondary battery; a transmitter to transmit a signal corresponding to the remaining amount of the secondary battery; a receiver to receive the signal transmitted by the transmitter; and a controller to control the AC-DC converter using the signal received by the receiver.Type: ApplicationFiled: September 15, 2009Publication date: September 16, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takafumi SAKAMOTO, Koji Ogura, Shoji Otaka, Toshiyuki Umeda, Tsuyoshi Kogawa, Manabu Mukai
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Publication number: 20100215116Abstract: A wireless communication apparatus for performing communication using a first communication scheme which transmits a signal using amplitude shift keying and a second communication scheme which suppresses communication with others except a communication counterpart by transmitting a transmission suppression signal before communication is started. The apparatus includes: a first signal generation unit configured to generate transmission data; a modulation unit configured to generate first and second signals having different amplitudes by amplitude-shift keying the transmission data; a second signal generation unit configured to generate the transmission suppression signal having a signal length corresponding to that of the first signal; and a transmission unit configured to transmit the transmission suppression signal at the timing when the first signal is transmitted.Type: ApplicationFiled: September 15, 2009Publication date: August 26, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsuyoshi KOGAWA, Kiyoshi Toshimitsu, Takafumi Sakamoto, Koji Ogura, Shoji Otaka, Toshiyuki Umeda
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Publication number: 20100164564Abstract: A starting apparatus includes: a storage unit storing an identifier; a rectifying unit rectifying a reception signal; a generating unit comparing the reception signal rectified in the rectifying unit to a reference signal and generating a digital signal from the reception signal; a judging unit judging whether or not the digital signal contains information of the identifier; a reference changing unit changing the reference signal when the judging unit judges that the reception signal does not contain information of the identifier; and a start instructing unit instructing start of an electric appliance when the judging unit judges that the reception signal contains information of the identifier.Type: ApplicationFiled: September 16, 2009Publication date: July 1, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shoji Otaka, Toshiyuki Umeda, Shigeyasu Iwata, Takafumi Sakamoto, Tsuyoshi Kogawa, Koji Ogura, Makoto Tsuruta, Yu Kaneko, Nobuhiko Sugasawa
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Publication number: 20100124215Abstract: A transmitter includes a power measurement unit, a carrier sense unit, and a transmission unit. A first frequency band is allocated to a TDMA system. The power measurement unit measures a receiving power over a part of a first frequency band and a second frequency band. The carrier sense unit continues to check for a certain duration whether the receiving power is smaller than a threshold. The transmission unit generates a transmission signal including a dummy signal and a data signal when the receiving power has been smaller than the threshold for the certain duration. Moreover, the transmission unit transmits the transmission signal using the second frequency band.Type: ApplicationFiled: November 12, 2009Publication date: May 20, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsuyoshi Kogawa, Takafumi Sakamoto
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Publication number: 20090010357Abstract: There is provided with a terminal apparatus including: a block generation unit configured to generate a block that includes a plurality of symbols being temporally consecutive and one or more repetition symbols added to a head end of the symbols, the repetition symbols having same waveform as a partial waveform including a rear end of the symbols and SVini (SVini is greater than or equal to 0) symbol preceding the partial waveform including the rear end of the symbols is an extended repetition symbol having same waveform as that of SVini symbol on a rear end of an immediately preceding block; a transmission timing calculation unit configured to calculate a transmission timing at which the block is transmitted according to a symbol rate of the block and a number of extended repetition symbols included in the block; and a transmission unit configured to transmit the block at a calculated transmission timing.Type: ApplicationFiled: June 23, 2008Publication date: January 8, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Tsuyoshi KOGAWA
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Publication number: 20080311925Abstract: A base station communicates with plural terminals with using plural frequency channels having different bandwidths.Type: ApplicationFiled: August 22, 2007Publication date: December 18, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Tsuyoshi KOGAWA
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Publication number: 20070184801Abstract: A radio reception apparatus is a radio reception apparatus for demodulating a multicarrier signal modulated according to multicarrier modulation. It includes a plurality of antenna sections, each for receiving a multicarrier signal, a plurality of carrier selection sections, each of the carrier selection sections selecting at least one subcarrier signal for each of the antenna sections out of the multicarrier signal received by each of the antenna sections, an antenna selection section for selecting a reception antenna section from among the antenna sections based on the signal strengths of the subcarrier signals selected by the carrier selection sections, and a demodulation section for demodulating the multicarrier signal received by the antenna section selected by the antenna selection section.Type: ApplicationFiled: April 16, 2007Publication date: August 9, 2007Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsuyoshi Kogawa, Hideo Kasami
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Patent number: 7212793Abstract: A radio reception apparatus is a radio reception apparatus for demodulating a multicarrier signal modulated according to multicarrier modulation. It includes a plurality of antenna sections, each for receiving a multicarrier signal, a plurality of carrier selection sections, each of the carrier selection sections selecting at least one subcarrier signal for each of the antenna sections out of the multicarrier signal received by each of the antenna sections, an antenna selection section for selecting a reception antenna section from among the antenna sections based on the signal strengths of the subcarrier signals selected by the carrier selection sections, and a demodulation section for demodulating the multicarrier signal received by the antenna section selected by the antenna selection section.Type: GrantFiled: July 29, 2004Date of Patent: May 1, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Tsuyoshi Kogawa, Hideo Kasami
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Publication number: 20050064832Abstract: A radio reception apparatus is a radio reception apparatus for demodulating a multicarrier signal modulated according to multicarrier modulation. It includes a plurality of antenna sections, each for receiving a multicarrier signal, a plurality of carrier selection sections, each of the carrier selection sections selecting at least one subcarrier signal for each of the antenna sections out of the multicarrier signal received by each of the antenna sections, an antenna selection section for selecting a reception antenna section from among the antenna sections based on the signal strengths of the subcarrier signals selected by the carrier selection sections, and a demodulation section for demodulating the multicarrier signal received by the antenna section selected by the antenna selection section.Type: ApplicationFiled: July 29, 2004Publication date: March 24, 2005Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsuyoshi Kogawa, Hideo Kasami