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公开(公告)号：US12052120B2
公开(公告)日：2024-07-30
申请号：US18354418
申请日：2023-07-18
Inventor： Yutaka Murakami , Yasuaki Yuda
CPC classification number: H04L25/0224 , H04L5/0048 , H04L27/2657 , H04L27/2666
Abstract: A reception apparatus according to the present disclosure includes a receiver which, in operation, receives a downlink signal including a first data signal for the reception apparatus and first Reference Signals for Phase Tracking (PT-RS). The first data signal is mapped on a first set of subcarriers and the first PT-RS is mapped to the downlink signal based on a first Modulation and Coding Scheme (MCS) configured for the first data signal. The reception apparatus according also includes a circuit which, in operation, estimates a phase noise using the first PT-RS included in the downlink signal.
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公开(公告)号：US12009885B2
公开(公告)日：2024-06-11
申请号：US17161163
申请日：2021-01-28
Inventor： Yutaka Murakami
IPC: H04B7/0413 , H04B7/06 , H04B7/08 , H04L5/00 , H04W84/12
CPC classification number: H04B7/0413 , H04B7/06 , H04B7/08 , H04L5/0007 , H04W84/12
Abstract: In a communication system that includes an access point, a repeater #1, and a repeater #2 and wirelessly communicates with a terminal, the access point wirelessly communicates with the repeater #1 on at least a first channel included in a first frequency band and wirelessly communicates with the repeater #2 on at least a second channel included in a second frequency band different than the first frequency band, the repeater #1 wirelessly communicates with the terminal on at least a third channel included in the second frequency band, and the repeater #2 wirelessly communicates with the terminal on at least a fourth channel included in the first frequency band.
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公开(公告)号：US11984982B2
公开(公告)日：2024-05-14
申请号：US17002051
申请日：2020-08-25
Inventor： Yutaka Murakami
CPC classification number: H04L1/0083 , H04W28/06 , H04W52/0229 , H04W52/0235 , H04W52/028 , H04W88/06
Abstract: A transmission device includes a generator that generates a frame in a predetermined frame format and a communicator that transmits the frame generated by the generator. The predetermined frame format includes a first field indicating whether information related to a wake-up process performed by a device that received a frame in the predetermined frame format is valid or not. When the first field indicates that the information is valid, the predetermined frame format further includes a second field indicating identification information identifying the device.
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公开(公告)号：US11949611B2
公开(公告)日：2024-04-02
申请号：US18093522
申请日：2023-01-05
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：US11888767B2
公开(公告)日：2024-01-30
申请号：US18102385
申请日：2023-01-27
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi , Hiroyuki Motozuka
IPC: H04L5/00 , H04B17/318 , H04B7/0408 , H04B7/0456 , H04L27/04 , H04L27/26
CPC classification number: H04L5/0023 , H04B7/0408 , H04B7/0456 , H04B17/318 , H04L5/0007 , H04L5/0048 , H04L27/04 , H04L27/2601 , H04L27/26362 , H04L27/2636
Abstract: A transmission device that improves data reception quality includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i×Δλ to the second precoded signal; 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 π/2 radians
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Patent Agency Ranking
公开(公告)号：US11863264B2
公开(公告)日：2024-01-02
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 , H04B7/0417 , H04B7/0615
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：US11848683B2
公开(公告)日：2023-12-19
申请号：US18058599
申请日：2022-11-23
Inventor： Yutaka Murakami , Shutai Okamura
CPC classification number: H03M13/116 , H03M13/1125 , H03M13/15 , H03M13/616 , H03M13/6362 , H03M13/6527 , H04L1/0041
Abstract: Disclosed are an encoder, a transmission device, and an encoding method with which the transmission amount is reduced and a deterioration in transmission efficiency is suppressed while improving reception quality when QC-LDPC or a like block encoding is used. A puncture pattern setting unit (620) searches for a puncture pattern for each integral multiple of the number of columns or for each divisor of the number of columns of a sub block matrix that forms a check matrix (H) of a QC-LDPC code, and a puncture unit (data reduction unit) (630) switches the puncture pattern for each integral multiple of the number of columns or for each divisor of the number of columns of the sub block matrix that forms the check matrix of the QC-LDPC code.
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公开(公告)号：US11757679B2
公开(公告)日：2023-09-12
申请号：US17328852
申请日：2021-05-24
Inventor： Yutaka Murakami , Yasuaki Yuda
CPC classification number: H04L25/0224 , H04L5/0048 , H04L27/2657 , H04L27/2666
Abstract: A reception apparatus according to the present disclosure includes a receiver which, in operation, receives a downlink signal including a first data signal for the reception apparatus and first Reference Signals for Phase Tracking (PT-RS). The first data signal is mapped on a first set of subcarriers and the first PT-RS is mapped to the downlink signal based on a first Modulation and Coding Scheme (MCS) configured for the first data signal. The reception apparatus according also includes a circuit which, in operation, estimates a phase noise using the first PT-RS included in the downlink signal.
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公开(公告)号：US11736160B2
公开(公告)日：2023-08-22
申请号：US17727635
申请日：2022-04-22
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC: H04B7/04 , H04B7/0456 , H04B7/0452 , H04B7/06 , H04B7/0413
CPC classification number: H04B7/0456 , H04B7/0413 , H04B7/0452 , H04B7/0628 , H04B7/0671
Abstract: Provided are M signal processors that respectively generate modulated signals for M reception apparatuses (where M is an integer equal to 2 or greater), a multiplexing signal processor, and N antenna sections (where N is an integer equal to 1 or greater). When transmitting multiple streams, each of the M signal processors generates two mapped signals, generates first and second precoded signals by precoding the two mapped signals, periodically changes the phase of signal points in the IQ plane with respect to the second precoded signal, outputs the phase-changed signal, and outputs the first precoded signal and the phase-changed second precoded signal as two modulated signals. When transmitting a single stream, each of the M signal processor outputs a single modulated signal. The multiplexing signal processor multiplexes the modulated signals output from the M signal processors, and generates N multiplexed signals. The N antenna sections respectively transmit the N multiplexed signals.
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公开(公告)号：US11696096B2
公开(公告)日：2023-07-04
申请号：US17745002
申请日：2022-05-16
Inventor： Yutaka Murakami
CPC classification number: H04W4/06 , H04B7/1851 , H04W28/14 , H04W84/06 , H04W88/16
Abstract: A controller, which is a communication device, includes: a transfer unit including a function of transferring data received from a first terminal to another communication device via wireless communication; and a determination unit configured to determine whether first information is included in the data received by the transfer unit, the first information indicating that the data is to be multicast. The transfer unit is further configured to multicast the data to a second terminal when the determination unit determines that the first information is included in the data, the second terminal and the first terminal being different terminals.
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