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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：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：US20230275692A1
公开(公告)日：2023-08-31
申请号：US18142720
申请日：2023-05-03
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L1/0041 , H04L27/34 , H03M13/255 , H04L1/0057 , H04L1/0071 , H04L1/0643 , H04L1/0045 , H03M13/1165
Abstract: In a transmission method according to one aspect of the present disclosure, a encoder performs error correction coding on an information bit string to generate a code word. A mapper modulates a first bit string in which the number of bits is the predetermined integral multiple of (X+Y) in the code word using a first scheme, the first scheme being a set of a modulation scheme in which an X-bit bit string is mapped to generate a first complex signal and a modulation scheme in which a Y-bit bit string is mapped to generate a second complex signal, and modulates a second bit string in which the first bit string is removed from the code word using a second scheme different from the first scheme.
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Patent Agency Ranking
公开(公告)号：US20230261730A1
公开(公告)日：2023-08-17
申请号：US18140980
申请日：2023-04-28
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04B7/10 , H04B7/0408 , H04B7/0452 , H04B7/06 , H04B7/08
CPC classification number: H04B7/10 , H04B7/0408 , H04B7/0452 , H04B7/0617 , H04B7/063 , H04B7/0684 , H04B7/0882
Abstract: Provided is a transmitting device which can expand a communication range when performing multicast/broadcast communication. The transmitting device includes a plurality of transmission antennas, and includes: a signal processor which generates a first baseband signal by modulating data of a first stream, and a second baseband signal by modulating data of a second stream; and a transmitter which generates, from the first baseband signal, first transmission signals having different directivities, generates, from the second baseband signal, second transmission signals having different directivities, and transmits the first transmission signals and the second transmission signals at a same time. When the transmitter has received, from a terminal, a request to transmit the first stream, the transmitter further generates, from the first baseband signal, third transmission signals which are different from the first transmission signals and have different directivities, and transmits the third transmission signals.
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公开(公告)号：US20230163817A1
公开(公告)日：2023-05-25
申请号：US18097644
申请日：2023-01-17
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI , Hiroyuki MOTOZUKA
IPC: H04B7/0456 , H04B7/0413 , H04B7/06 , H04B7/0417
CPC classification number: H04B7/0456 , H04B7/0413 , H04B7/0615 , H04B7/0417
Abstract: A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal; a first pilot inserter that inserts a pilot signal into the 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 phase-changed second precoded signal; and a phase changer that applies a phase change to the phase-changed and pilot-signal-inserted second precoded signal. Δλ satisfies π/2 radians
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公开(公告)号：US20230050434A1
公开(公告)日：2023-02-16
申请号：US17965873
申请日：2022-10-14
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：US20230048520A1
公开(公告)日：2023-02-16
申请号：US17973828
申请日：2022-10-26
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
Abstract: An indicator in a master AP from among a plurality of APs obtains communication quality of communication with an AP which is a communication partner. In the case where the obtained communication quality is less than a threshold, the indicator causes the plurality of APs including the master AP to perform cooperative operation to transmit data. In the case where the obtained communication quality is not less than the threshold, the indicator causes the plurality of APs including the master AP to stop the cooperative operation.
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公开(公告)号：US20210250124A1
公开(公告)日：2021-08-12
申请号：US17245170
申请日：2021-04-30
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
Abstract: One coding method of a plurality of coding methods including at least a first coding method and a second coding method is selected, an information sequence is encoded by using the selected coding method, and an encoded sequence obtained by performing predetermined processing on the information sequence is modulated and transmitted. The first coding method is a coding method having a first coding rate, for generating a first encoded sequence by performing puncturing processing on a generated first codeword by using a first parity check matrix. The second coding method is a coding method having a second coding rate, for generating a second encoded sequence by performing puncturing processing on a generated second codeword by using a second parity check matrix that is different from the first parity check matrix, the second coding rate after the puncturing process being different from the first coding rate.
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