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公开(公告)号：US20250038830A1
公开(公告)日：2025-01-30
申请号：US18912167
申请日：2024-10-10
Inventor： Yutaka MURAKAMI
IPC: H04B7/15 , H04B7/0413 , H04W40/22 , H04W72/0446
Abstract: This communication device relays a relay signal to be transmitted to and from a first communication device and a second communication device, and is connected to a first apparatus. The communication device transmits the relay signal using a first transmission slot, and also transmits, using a second transmission slot, a signal having been transmitted from the first apparatus, said signal being transmitted within the transmission period of the first transmission slot in a frequency domain different from that of the first transmission slot.
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公开(公告)号：US20250038796A1
公开(公告)日：2025-01-30
申请号：US18890602
申请日：2024-09-19
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04B7/0456 , H04B7/0413 , H04B7/0452 , H04B7/06
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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103.发明公开公开(公告)号：US20240313891A1
公开(公告)日：2024-09-19
申请号：US18675739
申请日：2024-05-28
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L1/0068 , H03M13/1102 , H03M13/2906 , H03M13/616 , H03M13/6362 , H03M13/6516 , H04L1/0009 , H04L1/0041 , H04L1/0045 , H04L1/0057
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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公开(公告)号：US20240113927A1
公开(公告)日：2024-04-04
申请号：US18529095
申请日：2023-12-05
Inventor： Yutaka MURAKAMI , Yoshio URABE , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04L27/26 , H04B7/00 , H04B7/0413 , H04B7/0456 , H04B7/06 , H04L1/1607 , H04L5/00
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：US20230353278A1
公开(公告)日：2023-11-02
申请号：US18350635
申请日：2023-07-11
Inventor： Yutaka MURAKAMI , Shutai OKAMURA
CPC classification number: H04L1/0041 , H04L1/1819 , H03M13/353 , H04L1/1877 , H03M13/17 , H03M13/1154 , H04L1/08 , H03M13/2703 , H04L1/0045 , H03M13/356 , H03M13/2707 , H03M13/6356 , H04L1/0057 , H03M13/373 , H03M13/6306 , 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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Patent Agency Ranking
公开(公告)号：US20230344470A1
公开(公告)日：2023-10-26
申请号：US18218668
申请日：2023-07-06
Inventor： Tomohiro KIMURA , Yutaka MURAKAMI , Mikihiro OUCHI
IPC: H04B7/0413 , H04B1/16 , H04W4/06 , H04W16/26 , H04W16/28 , H04W76/40 , H04B7/0404 , H04B7/06 , H04B7/08 , H04N21/2365 , H04N21/426
CPC classification number: H04B7/0413 , H04B1/16 , H04W4/06 , H04W16/26 , H04W16/28 , H04W76/40 , H04B7/0404 , H04B7/0697 , H04B7/0874 , H04N21/2365 , H04N21/42615 , H04N21/4263 , H04B7/10
Abstract: By a transmission method according to one aspect of the present disclosure, in a broadcasting system that generates a first broadcasting signal and a second broadcasting signal by performing multi-antenna encoding on program data, and wirelessly transmits a first broadcasting signal and a second broadcasting signal, a first transmit station transmits the first broadcasting signal, a second transmit station transmits the second broadcasting signal, the first transmit station and the second transmit station transmit the first broadcasting signal and the second broadcasting signal to an overlapping area at an identical time using an overlapping frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, and arrangement of the first transmit station differs from arrangement of the second transmit station.
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公开(公告)号：US20230318708A1
公开(公告)日：2023-10-05
申请号：US18327550
申请日：2023-06-01
Inventor： Yutaka MURAKAMI
IPC: H04B10/116 , H04B10/2575 , H04W48/08 , H04W48/16 , H04W84/12 , H04W48/20 , H04W12/06 , B64D11/00
CPC classification number: H04B10/116 , H04B10/25752 , H04W48/08 , H04W48/16 , H04W84/12 , H04W48/20 , H04W12/06 , B64D11/0015 , H04W64/00
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：US20230239184A1
公开(公告)日：2023-07-27
申请号：US18130043
申请日：2023-04-03
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04L27/26 , H04L5/00 , H04B7/0413 , H04J11/00
CPC classification number: H04L27/2602 , H04L5/0053 , H04L5/0094 , H04B7/0413 , H04J11/00 , H04L27/2601 , H04B7/10
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：US20230109889A1
公开(公告)日：2023-04-13
申请号：US18058599
申请日：2022-11-23
Inventor： Yutaka MURAKAMI , Shutai OKAMURA
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：US20230048618A1
公开(公告)日：2023-02-16
申请号：US17977224
申请日：2022-10-31
Inventor： Yutaka MURAKAMI , Nobuhiko HASHIDA , Ryutaro MONDEN
IPC: H04B10/54 , H04B10/116 , H04B10/508
Abstract: A transmission method includes: in a first period, causing a light source to emit light having a first luminance; and in a second period, causing the light source to transmit an optical signal by causing the light source to alternately emit light having a second luminance and light having a third luminance lower than the second luminance.
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