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公开(公告)号：US11043971B2
公开(公告)日：2021-06-22
申请号：US17029488
申请日：2020-09-23
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：US10819370B2
公开(公告)日：2020-10-27
申请号：US16245424
申请日：2019-01-11
Inventor： Yutaka Murakami , Shutai Okamura
Abstract: Disclosed are an encoder, a transmitting device, a coding method and a transmission 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 coding is used. A puncture pattern setting unit 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) 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：US10778331B2
公开(公告)日：2020-09-15
申请号：US16831344
申请日：2020-03-26
Inventor： Yutaka Murakami
IPC: H04B10/116 , H04B10/2575 , H04W48/08 , H04W84/12 , H04W48/20 , H04W12/06 , H04W48/16 , 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 receiverreceiver (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：US10727975B2
公开(公告)日：2020-07-28
申请号：US16360221
申请日：2019-03-21
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC: H03M13/00 , H04L1/00 , H04L27/34 , H03M13/25 , H04L1/06 , H03M13/11 , H04B7/06 , H04B7/0413 , H04L27/18
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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公开(公告)号：US10667204B2
公开(公告)日：2020-05-26
申请号：US15818642
申请日：2017-11-20
Inventor： Yutaka Murakami
IPC: H04W48/18 , H04W88/06 , H04W88/14 , H04W4/00 , H04L29/08 , H04W76/16 , H04W4/18 , H04W76/15 , H04L1/00
Abstract: A plurality of communication stations transmit a plurality of modulated signals so that data is efficiently transmitted from a network through negotiation by a communication terminal capable of transmitting and receiving modulated signals of a plurality of wireless communication schemes with a proxy server present on a network. The communication terminal receives a plurality of modulated signals to obtain data. Thus, the efficiency of frequency utilization is improved.
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Patent Agency Ranking
公开(公告)号：US10608783B2
公开(公告)日：2020-03-31
申请号：US16444663
申请日：2019-06-18
Inventor： Tomohiro Kimura , Yutaka Murakami , Mikihiro Ouchi
Abstract: A reception device includes: a receiver that receives a multiplexed signal; a first demapper that demaps the multiplexed signal, with a second modulated symbol stream of a second data series being included in the multiplexed signal as an undefined signal component, to generate a first bit likelihood stream of a first data series; a second demapper that demaps the multiplexed signal, with a first modulated symbol stream of the first data series being included in the multiplexed signal as an undefined signal component, to generate a second bit likelihood stream of the second data series; a first decoder that performs error control decoding on the first bit likelihood stream to derive the first data series; and a second decoder that performs error control decoding on the second bit likelihood stream to derive the second data series.
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公开(公告)号：US10454613B2
公开(公告)日：2019-10-22
申请号：US14515002
申请日：2014-10-15
Inventor： Yutaka Murakami , Shutai Okamura
IPC: H04L1/00 , H03M13/00 , H03M13/17 , H03M13/37 , H03M13/11 , H03M13/27 , H03M13/35 , H04L1/08 , H04L1/18
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 a information packets, where n satisfies the formula Kmax×(q−1)≤n.
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公开(公告)号：US10419082B2
公开(公告)日：2019-09-17
申请号：US16102078
申请日：2018-08-13
Inventor： Tomohiro Kimura , Yutaka Murakami , Mikihiro Ouchi
IPC: H04B7/0413 , H04B1/16 , H04W4/06 , H04W16/26 , H04W16/28 , H04B7/0404 , H04B7/06 , H04B7/08 , H04N21/2365 , H04N21/426 , 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：US10411835B2
公开(公告)日：2019-09-10
申请号：US15175379
申请日：2016-06-07
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. Further, a number of bits of the first encoded sequence is equal to a number of bits of the second encoded sequence.
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公开(公告)号：US10396938B2
公开(公告)日：2019-08-27
申请号：US16139815
申请日：2018-09-24
Inventor： Tomohiro Kimura , Yutaka Murakami , Mikihiro Ouchi
Abstract: A reception device includes: a receiver that receives a multiplexed signal; a first demapper that demaps the multiplexed signal, with a second modulated symbol stream of a second data series being included in the multiplexed signal as an undefined signal component, to generate a first bit likelihood stream of a first data series; a second demapper that demaps the multiplexed signal, with a first modulated symbol stream of the first data series being included in the multiplexed signal as an undefined signal component, to generate a second bit likelihood stream of the second data series; a first decoder that performs error control decoding on the first bit likelihood stream to derive the first data series; and a second decoder that performs error control decoding on the second bit likelihood stream to derive the second data series.
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