Patents by Inventor Hiroyuki Motozuka
Hiroyuki Motozuka 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: 20190052395Abstract: A header encoding unit performs bit scramble and LDPC encoding on the PHY control data to generate L-Header and EDMG-Header data. A modulation unit encodes the L-Header and the E-Header output from the header encoding unit. In addition, the modulation unit duplicates the data of the L-Header and the E-Header in accordance with the bandwidth of the channel notified by an RF control unit and arranges the data on a plurality of channels. The modulation unit further modulates one piece of the payload data divided by a payload data dividing unit.Type: ApplicationFiled: October 18, 2018Publication date: February 14, 2019Inventors: HIROYUKI MOTOZUKA, NAGANORI SHIRAKATA, TAKENORI SAKAMOTO, MASATAKA IRIE
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Publication number: 20190052327Abstract: A communication apparatus includes a PHY frame generating circuit that generates a PHY frame including either of a short Sector Sweep frame and a Sector Sweep frame; and an array antenna that selects, based on the PHY frame, any sector from among a plurality of sectors and transmits the PHY frame. In a case where, in the PHY frame including the short Sector Sweep frame, a Direction field of the short Sector Sweep frame indicates Initiator Sector Sweep, the PHY frame generating circuit replaces a Short Sector Sweep Feedback field indicating a number of a selected best short Sector Sweep with a Short Scrambled Basic Service Set ID field indicating an abbreviated address generated from an address of a destination communication apparatus.Type: ApplicationFiled: October 10, 2018Publication date: February 14, 2019Inventors: Hiroyuki Motozuka, Masataka Irie, Takenori Sakamoto, Naganori Shirakata, Yao Huang Gaius Wee, Michael Hong Cheng Sim, Lei Huang
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Publication number: 20180367650Abstract: A transmitting device includes: a transmission signal generation circuit that generates a transmission signal using a frame format including a legacy short training field (STF), a legacy channel estimation field (CEF), a legacy header field, an enhanced directional multi-gigabit (EDMG) header field, an EDMG-STF, an EDMG-CEF, and a data field; and a transmission circuit that transmits the generated transmission signal using one or more channels, wherein the legacy header field includes a data length field expressed by multiple bits, and the data length field indicates, to a legacy terminal, information related to a data length using all of the multiple bits, and indicates, to an EDMG terminal, information related to a data length using a subset of the multiple bits, and uses the remaining bit or bits to indicate information related to the one or more channels in which the transmission signal is transmitted.Type: ApplicationFiled: August 24, 2018Publication date: December 20, 2018Inventors: HIROYUKI MOTOZUKA, NAGANORI SHIRAKATA, MASATAKA IRIE, TAKENORI SAKAMOTO
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Publication number: 20180279170Abstract: The present disclosure provides a wireless communication device provided with: a transmission signal generation unit that generates an A-PPDU that has a legacy preamble, a legacy header, data fields allocated to each of a plurality of different STAs, a plurality of non-legacy headers in which various types of information relating to the plurality of data fields are described, and a plurality of non-legacy preambles; and a transmission unit that transmits the A-PPDU in a wireless manner.Type: ApplicationFiled: July 7, 2016Publication date: September 27, 2018Inventors: TAKENORI SAKAMOTO, HIROYUKI MOTOZUKA, MASATAKA IRIE
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Publication number: 20180219591Abstract: A transmission method includes encoding processing that generates an encoded block, modulation processing that generates symbols from the encoded block, phase change processing that changes the phase of the symbols, and transmission processing that arranges the symbols in data carriers and transmits the symbols. The transmission processing configures a frame by arranging symbol groups in order in the frequency direction and transmits the frame. The symbol groups each include a symbol generated from a first encoded block and a symbol generated from a second encoded block. The phase change processing includes changing the phase of symbols the same symbol group using the same phase change value.Type: ApplicationFiled: July 19, 2016Publication date: August 2, 2018Inventors: Yutaka MURAKAMI, Tomohiro KIMURA, Mikihiro OUCHI, Hiroyuki MOTOZUKA
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Publication number: 20180219597Abstract: A base station device includes a frame generator circuitry that generates a first training frame used for receive beam training among frames used for beamforming training, a beam controller circuitry that sets a beam used to transmit the first training frame to an omnidirectional mode, a transmitter circuitry that transmits the first training frame at the lowest MCS rate of IEEE 802.11, a receiver circuitry that receives first and second response frames from a wireless terminal device that has received the first training frame after a determined period since transmission of the first training frame, and a frame determiner circuitry that determines whether the first response frame is a response to the receive beam training. In a case where the first response frame is a response to the receive beam training, the beam controller circuitry sets a beam received by the receiver circuitry to a directional beam, and the receiver circuitry receives the second response frame with a directional beam.Type: ApplicationFiled: March 29, 2018Publication date: August 2, 2018Inventors: MASATAKA IRIE, NAGANORI SHIRAKATA, HIROYUKI MOTOZUKA, HIROSHI TAKAHASHI
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Publication number: 20180167230Abstract: In a transmission apparatus, signal carrier signal circuity that generates two single carrier signals including a legacy preamble signal, a legacy header signal and an extension header signal respectively. OFDM signal circuity that generates one OFDM signal by performing an IFFT processing on one or more payload signals. Transmission circuity that transmits the two single carrier signals by allocating to a bonding channel which is formed by bonding two adjacent channels used in a bonding transmission scheme and the one OFDM signal by allocating to the bonding channel which is frequency-shifted.Type: ApplicationFiled: February 9, 2018Publication date: June 14, 2018Inventors: HIROYUKI MOTOZUKA, NAGANORI SHIRAKATA, TAKENORI SAKAMOTO, MASATAKA IRIE
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Patent number: 9942778Abstract: A virtual base station apparatus (virtual AP) formed by a plurality of base station apparatuses (APs) requests a terminal apparatus (STA) to start beamforming training. The terminal apparatus transmits a plurality of first training frames to the virtual base station apparatus. The virtual base station apparatus receives the plurality of first training frames by using the plurality of base station apparatuses, and transmits a plurality of second training frames including information on a training frame received under the best conditions from a first base station apparatus that has received the training frame received under the best conditions to the terminal apparatus. The terminal apparatus receives the plurality of second training frames, and transmits to the virtual base station apparatus a second frame including information on a frame received under the best conditions among the plurality of second received training frames.Type: GrantFiled: March 1, 2017Date of Patent: April 10, 2018Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Yuji Tomisawa, Naganori Shirakata, Hiroyuki Motozuka, Masataka Irie
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Patent number: 9942059Abstract: A virtual base station apparatus includes: a first base station apparatus and a second base station apparatus. The first base station apparatus includes a first receiver that receives a plurality of first training frames, a first transmitter that transmits a plurality of second training frames to a terminal apparatus, and a calculator that calculates a first reception quality of each of the plurality of first training frames. The terminal apparatus includes a second transmitter that transmits the plurality of first training frames to the plurality of base station apparatuses, and a second receiver that receives the plurality of second training frames. The first receiver receives a second reception quality of each of the plurality of first training frames from the second base station apparatus. The first reception quality is transmitted to the second base station apparatus when the first reception quality is higher than the second reception quality.Type: GrantFiled: March 2, 2017Date of Patent: April 10, 2018Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Yuji Tomisawa, Naganori Shirakata, Hiroyuki Motozuka, Masataka Irie
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Patent number: 9838036Abstract: A storage which, in operation, stores a first minimum value and a second minimum value each time a plurality of data are input. Round-robin comparison circuitry which, in operation, makes a magnitude comparison among the plurality of data. First selection comparison circuitry and second selection comparison circuitry which, in operation, make a magnitude comparison between the first minimum value and each of the plurality of data and a magnitude comparison between the second minimum value and each of the plurality of data, respectively. Judgment circuitry which, in operation, judges a new first minimum value and a new second minimum value on the basis of a comparison result from the round-robin comparison circuitry and comparison results from the first and second selection comparison circuitry.Type: GrantFiled: February 1, 2016Date of Patent: December 5, 2017Assignee: PANASONIC CORPORATIONInventors: Hiroyuki Motozuka, Hiroyuki Yoshikawa
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Patent number: 9825719Abstract: A radio communication device includes: a directivity control unit that configures each of directivities of a plurality of antennas; a directivity switching unit that switches between the directivities of the antennas; a reception quality estimation unit that measures a reception quality of a received signal received by the antennas; and a block error estimation unit that estimates a block error in reception data which is obtained by decoding the received signal. In the case where a block error occurs continuously for a predetermined number of times or longer and an amount of decrease in the reception quality is lower than a predetermined value, the directivity control unit re-adjusts a directivity to decrease the block error, based on a result of the estimation of the block error and a result of the measurement of the reception quality, the re-adjusted directivity being one of the directivities of the antennas.Type: GrantFiled: February 20, 2015Date of Patent: November 21, 2017Assignee: PANASONIC CORPORATIONInventors: Naganori Shirakata, Hiroyuki Motozuka
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Patent number: 9775049Abstract: A radio communication apparatus includes a discrete Fourier transformer that performs a frequency-domain transform on each of a plurality of reception signals received at a plurality of receiver chains and generates a plurality of frequency-domain signals, a covariance matrix calculator that calculates covariance of the plurality of frequency-domain signals, a deviation calculator that calculates a cumulative value of covariance in a first frequency range and a second frequency range and calculates deviation of the covariance in the plurality of frequency ranges, and an adjacent-channel interference determiner that determines presence or absence of adjacent-channel interference using the cumulative value of the covariance.Type: GrantFiled: February 19, 2015Date of Patent: September 26, 2017Assignee: PANASONIC CORPORATIONInventors: Hiroyuki Motozuka, Naganori Shirakata
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Publication number: 20170272275Abstract: A virtual base station apparatus include: a first base station apparatus and a second base station apparatus. The first base station apparatus includes a first receiver that receives a plurality of first training frames, a first transmitter that transmits a plurality of second training frames to a terminal apparatus, and a calculator that calculates a first reception quality of each of the plurality of first training frames. The terminal apparatus includes a second transmitter that transmits the plurality of first training frames to the plurality of base station apparatuses, and a second receiver that receives the plurality of second training frames. The first receiver receives a second reception quality of each of the plurality of first training frames from the second base station apparatus. The first reception quality is transmitted to the second base station apparatus when the first reception quality is higher than the second reception quality.Type: ApplicationFiled: March 2, 2017Publication date: September 21, 2017Inventors: Yuji TOMISAWA, Naganori SHIRAKATA, Hiroyuki MOTOZUKA, Masataka IRIE
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Publication number: 20170272959Abstract: A virtual base station apparatus (virtual AP) formed by a plurality of base station apparatuses (APs) requests a terminal apparatus (STA) to start beamforming training. The terminal apparatus transmits a plurality of first training frames to the virtual base station apparatus. The virtual base station apparatus receives the plurality of first training frames by using the plurality of base station apparatuses, and transmits a plurality of second training frames including information on a training frame received under the best conditions from a first base station apparatus that has received the training frame received under the best conditions to the terminal apparatus.Type: ApplicationFiled: March 1, 2017Publication date: September 21, 2017Inventors: YUJI TOMISAWA, NAGANORI SHIRAKATA, HIROYUKI MOTOZUKA, MASATAKA IRIE
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Patent number: 9537510Abstract: A variable shifter includes: a plurality of shifters that cyclically shift input data having a plurality of bits or cyclically shifted data; and a control unit that selects a shift amount for each of the plurality of shifters in accordance with a predetermined cyclic shift amount. The number of types of the predetermined cyclic shift amount is smaller than the number of bits in the input data, each shifter selects one of a plurality of shift amounts in accordance with the predetermined cyclic shift amount, and the plurality of shift amounts have a combination of shift amounts that differ from one shifter to another.Type: GrantFiled: February 2, 2015Date of Patent: January 3, 2017Assignee: Panasonic Intellectual Property Managament Co., Ltd.Inventors: Hiroyuki Motozuka, Hiroyuki Yoshikawa
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Publication number: 20160241360Abstract: A storage which, in operation, stores a first minimum value and a second minimum value each time a plurality of data are input. Round-robin comparison circuitry which, in operation, makes a magnitude comparison among the plurality of data. First selection comparison circuitry and second selection comparison circuitry which, in operation, make a magnitude comparison between the first minimum value and each of the plurality of data and a magnitude comparison between the second minimum value and each of the plurality of data, respectively. Judgment circuitry which, in operation, judges a new first minimum value and a new second minimum value on the basis of a comparison result from the round-robin comparison circuitry and comparison results from the first and second selection comparison circuitry.Type: ApplicationFiled: February 1, 2016Publication date: August 18, 2016Inventors: HIROYUKI MOTOZUKA, HIROYUKI YOSHIKAWA
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Patent number: 9369220Abstract: A receiving device that receives a signal in a receiving antenna. The receiving device includes a gain controller that adjusts a gain in the receiving device in response to information related to power of the signal, and a signal detector that determines whether, within a predetermined period after the information related to the power of the signal exceeds a first threshold value, the information related to the power of the signal exceeds a second threshold value which is larger than the first threshold value. The gain controller adjusts a search range of the gain in the receiving device based on a determination result of the signal detector with respect to the information related to the power of the signal.Type: GrantFiled: August 12, 2015Date of Patent: June 14, 2016Assignee: Panasonic CorporationInventors: Koichiro Tanaka, Hiroyuki Motozuka, Naoya Yosoku
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Publication number: 20150349901Abstract: A receiving device that receives a signal in a receiving antenna. The receiving device includes a gain controller that adjusts a gain in the receiving device in response to information related to power of the signal, and a signal detector that determines whether, within a predetermined period after the information related to the power of the signal exceeds a first threshold value, the information related to the power of the signal exceeds a second threshold value which is larger than the first threshold value. The gain controller adjusts a search range of the gain in the receiving device based on a determination result of the signal detector with respect to the information related to the power of the signal.Type: ApplicationFiled: August 12, 2015Publication date: December 3, 2015Inventors: Koichiro Tanaka, Hiroyuki Motozuka, Naoya Yosoku
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Patent number: 9154245Abstract: A receiving device that receives a signal in a receiving antenna. The receiving device includes a gain controller that adjusts a gain in the receiving device in response to information related to power of the signal, and a signal detector that determines whether, within a predetermined period after the information related to the power of the signal exceeds a first threshold value, the information related to the power of the signal exceeds a second threshold value which is larger than the first threshold value. The gain controller adjusts a search range of the gain in the receiving device based on a determination result of the signal detector with respect to the information related to the power of the signal.Type: GrantFiled: January 27, 2015Date of Patent: October 6, 2015Assignee: Panasonic CorporationInventors: Koichiro Tanaka, Hiroyuki Motozuka, Naoya Yosoku
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Patent number: 9141470Abstract: A decoding device has a decoding section that has a plurality of decoding cores which decode a received packet (e.g., likelihoods generated as a result of demodulation), which will become data to be decoded, in parallel on a per-likelihood basis and in which a first decoding core and a second decoding core of a plurality of decoding cores can perform decoding in parallel and a control section that controls decoding, wherein the decoding section lets the second decoding core decode a second likelihood when the second likelihood is input in the middle of the first decoding core decoding the first likelihood of the data to be decoded, whereby another likelihood can be decoded by use of another decoding core in the middle of decoding of a certain likelihood. Thus, entire decoding speed is increased.Type: GrantFiled: March 5, 2013Date of Patent: September 22, 2015Assignee: Panasonic CorporationInventors: Naoya Yosoku, Hiroyuki Yoshikawa, Hiroyuki Motozuka