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公开(公告)号：US09054755B2
公开(公告)日：2015-06-09
申请号：US14469769
申请日：2014-08-27
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04L27/265 , H04B7/0434 , H04B7/0452 , H04B7/0456 , H04B7/046 , H04B7/0473 , H04B7/0617 , H04B7/0697 , H04B7/08 , H04B7/086 , H04B7/12 , H04L1/0003 , H04L1/0009 , H04L1/0045 , H04L1/0047 , H04L1/005 , H04L1/0057 , H04L1/0061 , H04L1/0071 , H04L1/06 , H04L1/0643 , H04L5/0007 , H04L5/001 , H04L5/0023 , H04L5/0026 , H04L5/0048 , H04L25/0204 , H04L25/0222 , H04L25/0226 , H04L25/0248 , H04L25/03942 , H04L25/067 , H04L27/0008 , H04L27/2602 , H04L27/2626 , H04L27/3405 , H04L2001/0093
Abstract: Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.
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公开(公告)号：US12261787B2
公开(公告)日：2025-03-25
申请号：US18615499
申请日：2024-03-25
Inventor： Yutaka Murakami , Yoshio Urabe , Tomohiro Kimura , Mikihiro Ouchi
Abstract: A transmitting method includes: configuring a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data; and transmitting the frame, wherein the frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division, and among the plurality of OFDM symbols, OFDM symbols included in the second period include pilot symbols arranged along a time axis with a predetermined spacing therebetween, and a predetermined number of data symbols.
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公开(公告)号：US12206453B2
公开(公告)日：2025-01-21
申请号：US18599891
申请日：2024-03-08
Inventor： Yutaka Murakami
IPC: H04B10/116 , B64D11/00 , H04B10/2575 , H04W12/06 , H04W48/08 , H04W48/16 , H04W48/20 , H04W64/00 , H04W84/12
Abstract: A terminal (1050) includes a light receiver (151) that receives a light signal emitted by an apparatus (1000), the light signal including an identifier (SSID) of at least one base station (470); a receiver (153) that performs a reception process on the received light signal to output reception data; a data analyzer (155) that selects one base station based on the identifier of the at least one base station that is included in the reception data; and a radio device (453) that establishes a wireless connection with the selected base station (470) by using the identifier of the base station (470) and wirelessly communicates with the base station (470).
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公开(公告)号：US12149309B2
公开(公告)日：2024-11-19
申请号：US18219181
申请日：2023-07-07
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC: H04B7/06 , H04B7/04 , H04B7/0417 , H04J11/00 , H04L27/26
Abstract: A transmission method includes generating a first precoded signal and a second precoded signal by performing a precoding process on a first baseband signal and a second baseband signal, outputting a third signal by inserting a pilot signal into the first precoded signal, outputting a fourth signal by applying a first phase change to the second precoded signal, outputting a fifth signal by inserting a pilot signal into the fourth signal, and outputting a sixth signal by applying a second phase change to the fifth signal.
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公开(公告)号：US12126398B2
公开(公告)日：2024-10-22
申请号：US18143687
申请日：2023-05-05
Inventor： Yutaka Murakami , Nobuhiko Hashida
IPC: H04B3/54 , B60L53/12 , B60L53/30 , B60L53/66 , H02J7/00 , H02J7/02 , H02J50/10 , H02J50/80 , H04L67/01
CPC classification number: H04B3/54 , B60L53/12 , B60L53/305 , B60L53/66 , H02J7/00032 , H02J7/0042 , H02J7/02 , H02J50/10 , H02J50/80 , H04L67/01
Abstract: A communication system includes one or more chargers and a server capable of communicating with the one or more chargers. The server obtains first information from a first vehicle via a first charger included in the one or more chargers, during charging of the first vehicle by the first charger, and supplies second information based on the first information to a second vehicle via a second charger included in the one or more chargers, during charging of the second vehicle by the second charger.
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Patent Agency Ranking
公开(公告)号：US12101182B2
公开(公告)日：2024-09-24
申请号：US18350635
申请日：2023-07-11
Inventor： Yutaka Murakami , Shutai Okamura
IPC: H04L1/00 , H03M13/00 , H03M13/11 , H03M13/17 , H03M13/27 , H03M13/35 , H03M13/37 , H04L1/08 , H04L1/18 , H04L1/1812 , H04L1/1867
CPC classification number: H04L1/0041 , H03M13/1154 , H03M13/17 , H03M13/2703 , H03M13/2707 , H03M13/353 , H03M13/356 , H03M13/373 , H03M13/6306 , H03M13/6356 , H04L1/0045 , H04L1/0057 , H04L1/08 , H04L1/1819 , H04L1/1877 , H03M13/3761
Abstract: A loss correction encoding device having an improved capability of loss correction using LDPC-CC includes a rearranging unit that rearranges information data contained in n information packets according to the constraint length Kmax and the encoding rate (q−1)/q of a check polynomial of the loss correction code used in a loss correction encoding unit. Specifically, the rearranging unit rearranges the information data in such a way that continuous Kmax×(q−1) pieces of information data after rearrangement are contained in different information packets. The rearranging unit distributes the information data to information blocks from n information packets, where n satisfies the formula Kmax×(q−1)≤n.
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公开(公告)号：US11894928B2
公开(公告)日：2024-02-06
申请号：US18068464
申请日：2022-12-19
Inventor： Yutaka Murakami , Shutai Okamura , Kiyotaka Kobayashi , Masayuki Orihashi , Kazuaki Takahashi
CPC classification number: H04L1/0071 , H03M13/15 , H04L1/0003 , H04L1/0009 , H04L1/0059 , H04L1/22 , H04L5/0007 , H04L27/0008 , H04L27/36 , H04L27/38 , H04L27/2647
Abstract: A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.
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公开(公告)号：US11876655B2
公开(公告)日：2024-01-16
申请号：US17960240
申请日：2022-10-05
Inventor： Yutaka Murakami , Yoshio Urabe , Tomohiro Kimura , Mikihiro Ouchi
IPC: H04L27/26 , H04B7/00 , H04B7/0413 , H04B7/0456 , H04B7/06 , H04L1/1607 , H04L5/00 , H04J11/00
CPC classification number: H04L27/261 , H04B7/00 , H04B7/0413 , H04B7/0456 , H04B7/0697 , H04L1/1671 , H04L5/0023 , H04L5/0048 , H04L5/0053 , H04L27/2692 , H04J2011/0016
Abstract: A transmitting method includes: configuring a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating a plurality of transmission data to a plurality of areas; and transmitting the frame. The plurality of areas are each identified by at least one time resource among resources and at least one frequency resource among frequency resources. The frame includes a first period in which a preamble is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division. The second period includes a first area, and the first area includes a data symbol generated from first transmission data, a data symbol generated from second transmission data and subsequent to the data symbol generated from the first transmission data, and a dummy symbol subsequent to the data symbol generated from the second transmission data.
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公开(公告)号：US11876610B2
公开(公告)日：2024-01-16
申请号：US16990446
申请日：2020-08-11
Inventor： Tomohiro Kimura , Yutaka Murakami , Mikihiro Ouchi
CPC classification number: H04J99/00 , H04J14/005 , H04L27/183 , H04L27/32 , H04L27/3488
Abstract: A transmission device includes: a first mapper that maps a first bit stream of a first data series to generate a first modulated symbol stream of the first data series; a second mapper that maps a second bit stream of a second data series to generate a second modulated symbol stream of the second data series; a converter that subjects the second modulated symbol stream to conversion in accordance with the first modulated symbol stream; a superposition unit that superposes the first modulated symbol stream and the second modulated symbol stream at a predetermined amplitude ratio to generate a multiplexed signal, the second modulated symbol stream having been subjected to the conversion in accordance with the first modulated symbol stream; and a transmitter that transmits the multiplexed signal.
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公开(公告)号：US11784704B2
公开(公告)日：2023-10-10
申请号：US17076188
申请日：2020-10-21
Inventor： Yutaka Murakami , Nobuhiko Hashida
Abstract: In a repeater device: a communication device receives position information of a forwarding source device and a forwarding destination device using a first communication scheme; based on the position information of the forwarding source device, a moving mechanism moves the repeater device to a position at which it is capable of communicating with the forwarding source device using a second communication scheme; the communication device receives data from the forwarding source device using the second communication scheme; a storage device stores the data; based on the position information of the forwarding destination device received by the communication device, the moving mechanism moves the repeater device to a position at which it is capable of communicating with the forwarding destination device using the second communication scheme, and the communication device transmits the data stored in the storage device to the forwarding destination device using the second communication scheme.
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