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公开(公告)号：US20250071005A1
公开(公告)日：2025-02-27
申请号：US18937532
申请日：2024-11-05
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04L27/26 , H04B7/0413 , H04B7/10 , H04J11/00 , H04L5/00
Abstract: A transmitting apparatus according to one aspect of the present disclosure transmits a plurality of first transmission data and a plurality of second transmission data by using an OFDM (Orthogonal Frequency-Division Multiplexing) method. The transmitting apparatus includes frame configuring circuitry, which in operation, generates a frame including a first period in which a preamble is transmitted, a second period in which the plurality of first transmission data is multiplexed by a time division multiplexing method and is transmitted, and a third period in which the plurality of second transmission data is multiplexed by a frequency division multiplexing method and is transmitted; and transmitting circuitry that transmits the frame.
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公开(公告)号：US20250039989A1
公开(公告)日：2025-01-30
申请号：US18884801
申请日：2024-09-13
Inventor： Yutaka MURAKAMI , Nobuhiko HASHIDA
Abstract: A communication system includes an outdoor gateway and an indoor gateway. The outdoor gateway includes: a communication IF that connects to an outdoor network; and a communication IF that communicates wirelessly. The indoor gateway includes: a communication IF that connects to an indoor network; and a communication IF that connects, via wireless communication, to the communication IF included in the outdoor gateway.
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公开(公告)号：US20250038787A1
公开(公告)日：2025-01-30
申请号：US18918393
申请日：2024-10-17
Inventor： Yutaka MURAKAMI , Nobuhiko HASHIDA
IPC: H04B3/54 , B60L53/12 , B60L53/30 , B60L53/66 , H02J7/00 , 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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公开(公告)号：US20250007644A1
公开(公告)日：2025-01-02
申请号：US18814106
申请日：2024-08-23
Inventor： Yutaka MURAKAMI , Shutai OKAMURA
IPC: H04L1/00 , H03M13/00 , H03M13/11 , H03M13/17 , H03M13/27 , H03M13/35 , H03M13/37 , H04L1/08 , H04L1/1812 , H04L1/1867
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：US20240305398A1
公开(公告)日：2024-09-12
申请号：US18669806
申请日：2024-05-21
Inventor： Yutaka MURAKAMI , Nobuhiko HASHIDA
IPC: H04J14/02 , H04B10/2575
CPC classification number: H04J14/0213 , H04B10/25753 , H04J14/0226 , H04J14/0234 , H04J14/0257
Abstract: A transmission device includes a symbol generator that generates a modulation symbol by mapping transmission data to a signal point arranged in a two-dimensional or three-dimensional color space; and an outputter that outputs an optical signal modulated according to the modulation symbol.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240204938A1
公开(公告)日：2024-06-20
申请号：US18591398
申请日：2024-02-29
Inventor： Yutaka MURAKAMI , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04L5/0044 , H04J1/02 , H04J3/02 , H04L1/0075 , H04L27/265 , H04L27/26522 , H04J11/00 , H04J2011/0016 , H04L5/0007 , H04L5/0053
Abstract: Provided are a frame configuring unit configured to configure 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 a transmitter which transmits the frame. The frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, a second period in which a plurality of transmission data are transmitted by time division, a third period in which a plurality of transmission data are transmitted by frequency division, and a fourth period in which a plurality of transmission data are transmitted by time division and frequency division.
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公开(公告)号：US20230413068A1
公开(公告)日：2023-12-21
申请号：US18248627
申请日：2021-09-08
Inventor： Yutaka MURAKAMI , Mikihiro OUCHI
CPC classification number: H04W16/28 , H04W74/002
Abstract: Provided is a wireless apparatus that can coexist with a wireless communication system, in which a communicatable distance is made longer, by beam forming. This wireless apparatus comprises: a reception circuit that receives a signal using a first directivity; and a control circuit that controls transmission or stand-by of a transmission signal on the basis of reception of the signal. The reception section of the signal is set shorter than the reception section of a signal received using a second directivity.
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公开(公告)号：US20230353202A1
公开(公告)日：2023-11-02
申请号：US18219181
申请日：2023-07-07
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04B7/06 , H04J11/00 , H04B7/04 , H04B7/0417 , H04L27/26
CPC classification number: H04B7/06 , H04B7/04 , H04B7/0421 , H04B7/0615 , H04B7/0671 , H04J11/00 , H04L27/2613 , H04L27/26134
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：US20230327830A1
公开(公告)日：2023-10-12
申请号：US18206747
申请日：2023-06-07
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI , Hiroyuki MOTOZUKA
IPC: H04L5/00 , H04B7/0456 , H04B7/06
CPC classification number: H04L5/0048 , H04B7/0456 , H04B7/0671
Abstract: A transmission device that improves data reception quality includes: a first pilot inserter that inserts a pilot signal into a first precoded signal; a phase changer that applies a phase change of i×Δλ to the second precoded signal, where i is a symbol number and an integer that is greater than or equal to 0; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. Δλ satisfies n/2 radians
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公开(公告)号：US20230327760A1
公开(公告)日：2023-10-12
申请号：US18333289
申请日：2023-06-12
Inventor： Yutaka MURAKAMI
IPC: H04B10/116 , H04W4/40 , H04B10/114 , H04W64/00
CPC classification number: H04B10/116 , H04W64/003 , H04B10/1149 , H04W4/40
Abstract: Useful data is transmitted to a terminal existing in a transportation vehicle. A communication apparatus installed in the transportation vehicle and configured to transmit the data to the terminal existing in the transportation vehicle includes a data selection unit and an illumination unit. The data selection unit acquires location information indicating a location of the transportation vehicle in which the terminal exists and which is traveling. Based on the acquired location information, the data selection unit selects approaching-location data related to a location ahead of a current location of the transportation vehicle in a traveling direction from a plurality of pieces of data related to the location. The illumination unit transmits, as a modulated light signal, a signal comprising the approaching-location data.
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