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公开(公告)号：US12126356B2
公开(公告)日：2024-10-22
申请号：US18334905
申请日：2023-06-14
Inventor： Yutaka Murakami
CPC classification number: H03M13/1102 , H03M13/23 , H03M13/235 , H03M13/2792 , H03M13/353 , H03M13/6502 , H03M13/6516 , H04L1/0041
Abstract: A transmission apparatus includes a signal processing circuit configured to obtain information data bits to be transmitted; add known information data bits to the information data bits to generate first data blocks; perform error-correction coding on the first data blocks to generate first coded data blocks including parity data blocks such that the first coded data blocks satisfy a first code rate; remove the known information data bits from the first coded data blocks to generate second coded data blocks, the second coded data blocks satisfying a second code rate different from the first code rate; and modulate the second coded data blocks using a modulation scheme to generate a modulated signal, which is then transmitted. A number of the known information data bits depends on a number of the information data bits such that the first code rate is fixed regardless of the number of the information data bits.
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公开(公告)号：US12119896B2
公开(公告)日：2024-10-15
申请号：US18218668
申请日：2023-07-06
Inventor： Tomohiro Kimura , Yutaka Murakami , Mikihiro Ouchi
IPC: H04B7/04 , H04B1/16 , H04B7/0404 , H04B7/0413 , H04B7/06 , H04B7/08 , H04N21/2365 , H04N21/426 , H04W4/06 , H04W16/26 , H04W16/28 , H04W76/40 , H04B7/10
CPC classification number: H04B7/0413 , H04B1/16 , H04B7/0404 , H04B7/0697 , H04B7/0874 , H04N21/2365 , H04N21/42615 , H04N21/4263 , H04W4/06 , H04W16/26 , H04W16/28 , H04W76/40 , 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：US11902067B2
公开(公告)日：2024-02-13
申请号：US18090731
申请日：2022-12-29
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04L27/2604 , H04B7/0413 , H04B7/06 , H04B7/0682 , H04B7/0697 , H04B7/08 , H04L27/3405 , H04L27/3416 , H04L27/36 , H04L27/38 , H04L1/005 , H04L1/0071
Abstract: A transmission method includes mapping processing, phase change processing, and transmission processing. In the mapping processing, a plurality of first modulation signals and a plurality of second modulation signals are generated using a first mapping scheme, and a plurality of third modulation signals and a plurality of fourth modulation signals are generated using a second mapping scheme. In the phase change processing, a phase change is performed on the plurality of second modulation signals and the plurality of fourth modulation signals using all N kinds of phases. In the transmission processing, the first modulation signals and the second modulation signals are respectively transmitted at a same frequency and a same time from different antennas, and the third modulation signals and the fourth modulation signals are respectively transmitted at a same frequency and a same time from the different antennas.
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公开(公告)号：US11863236B2
公开(公告)日：2024-01-02
申请号：US17977224
申请日：2022-10-31
Inventor： Yutaka Murakami , Nobuhiko Hashida , Ryutaro Monden
IPC: H04B10/11 , H04B10/54 , H04B10/116 , H04B10/508 , H04B10/516
CPC classification number: H04B10/541 , H04B10/116 , H04B10/508 , H04B10/11 , H04B10/516 , H04B10/5161
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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公开(公告)号：US11792724B2
公开(公告)日：2023-10-17
申请号：US17207390
申请日：2021-03-19
Inventor： Yutaka Murakami
IPC: H04W48/18 , H04W88/06 , H04W88/14 , H04W4/00 , H04W76/16 , H04W4/18 , H04L67/56 , H04W76/15 , H04L1/00
CPC classification number: H04W48/18 , H04L1/0083 , H04L67/56 , H04W4/00 , H04W4/18 , H04W76/15 , H04W76/16 , H04W88/06 , H04W88/14
Abstract: A terminal apparatus includes a receiver and reception signal control circuitry. The receiver, in operation, receives a first downlink data signal transmitted from a first communication station and receives a second downlink data signal transmitted from a first communication station, the first downlink data signal and the second downlink data signal being received over a first downlink channel and a second downlink channel that are at least partially overlapped in time and frequency domain. The reception signal control circuitry, in operation, demodulates the received first downlink data signal and a second downlink data signal.
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Patent Agency Ranking
公开(公告)号：US11711146B2
公开(公告)日：2023-07-25
申请号：US17695360
申请日：2022-03-15
Inventor： Yutaka Murakami
IPC: H04B10/116 , H04B10/2575 , H04W48/08 , H04W48/16 , H04W84/12 , H04W48/20 , H04W12/06 , B64D11/00 , H04W64/00
CPC classification number: H04B10/116 , B64D11/0015 , H04B10/25752 , H04W12/06 , H04W48/08 , H04W48/16 , H04W48/20 , H04W84/12 , 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：US11671166B2
公开(公告)日：2023-06-06
申请号：US16932015
申请日：2020-07-17
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 , H04B7/063 , H04B7/0617 , 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：US11658710B2
公开(公告)日：2023-05-23
申请号：US17528796
申请日：2021-11-17
Inventor： Yutaka Murakami , Hiroyuki Motozuka
IPC: H04B7/0456 , H04B1/04 , H04L27/20
CPC classification number: H04B7/0456 , H04B1/0475 , H04L27/206
Abstract: A transmission device 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. The weighting synthesizer performs, in the precoding process, a calculation that uses
F
=
(
e
j
θ
11
e
j
(
θ
11
+
π
4
)
e
j
θ
21
e
j
(
θ
21
+
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)
on the first baseband signal and the second baseband signal modulated via a modulation scheme of QPSK.-
公开(公告)号：US11581995B2
公开(公告)日：2023-02-14
申请号：US15580988
申请日：2016-06-01
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
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：US11563489B2
公开(公告)日：2023-01-24
申请号：US17523420
申请日：2021-11-10
Inventor： Yutaka Murakami , Nobuhiko Hashida
IPC: H04B10/00 , H04B10/116 , H04B10/85 , H04N7/22 , H04J14/00
Abstract: A communication system includes: a plurality of cameras that generate image data by capturing images; a server that stores the image data generated by each of the plurality of cameras; and a plurality of transmission devices in one-to-one correspondence with the plurality of cameras. Each of the plurality of transmission devices transmits light, including, as a visible light communication signal, information related to communication for accessing a storage location at which the image data generated by a corresponding one of the plurality of cameras is stored in the server.
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