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公开(公告)号：US20250007644A1
公开(公告)日：2025-01-02
申请号：US18814106
申请日：2024-08-23
Inventor： Yutaka MURAKAMI , Shutai OKAMURA
IPC: H04L1/00 , H03M13/00 , H03M13/11 , H03M13/17 , H03M13/27 , H03M13/35 , H03M13/37 , H04L1/08 , H04L1/1812 , H04L1/1867
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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公开(公告)号：US20200007272A1
公开(公告)日：2020-01-02
申请号：US16561308
申请日：2019-09-05
Inventor： Yutaka MURAKAMI , Shutai OKAMURA
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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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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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：US20220231756A1
公开(公告)日：2022-07-21
申请号：US17714286
申请日：2022-04-06
Inventor： Mikihiro OUCHI , Tomohiro KIMURA , Takayuki SOTOYAMA , Naoki ADACHI , Naoya SHIBAIKE , Shutai OKAMURA
Abstract: A signal processing device includes: a transmission path estimator that estimates a first transmission path characteristic of a transmission signal using a vertical signal out of vertical and horizontal signals resulting from being received by a vertical polarization antenna and a horizontal polarization antenna; a transmission path estimator that estimates a second transmission path characteristic of the transmission signal using the horizontal signal; a weight calculator that calculates a first weight for the vertical signal and a second weight for the horizontal signal, using the first transmission path characteristic and the second transmission path characteristic; and a weighting applier that applies weighted summation to the vertical signal and the horizontal signal using the first weight and the second weight.
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Patent Agency Ranking
公开(公告)号：US20190149167A1
公开(公告)日：2019-05-16
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：US20180145792A1
公开(公告)日：2018-05-24
申请号：US15621752
申请日：2017-06-13
Inventor： Yutaka MURAKAMI , Shutai OKAMURA , Kiyotaka KOBAYASHI , Masayuki ORIHASHI , Kazuaki TAKAHASHI
Abstract: A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.
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公开(公告)号：US20230124557A1
公开(公告)日：2023-04-20
申请号：US18068464
申请日：2022-12-19
Inventor： Yutaka MURAKAMI , Shutai OKAMURA , Kiyotaka KOBAYASHI , Masayuki ORIHASHI , Kazuaki TAKAHASHI
Abstract: A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts that encode transport data; a mapping part that performs such a mapping that encoded data sequentially formed by the encoding parts are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.
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公开(公告)号：US20210306090A1
公开(公告)日：2021-09-30
申请号：US17344020
申请日：2021-06-10
Inventor： Yutaka MURAKAMI , Shutai OKAMURA
IPC: H04L1/00 , H03M13/11 , H03M13/27 , H03M13/35 , H03M13/37 , H03M13/00 , H04L1/18 , H04L1/08 , H03M13/17
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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公开(公告)号：US20210006266A1
公开(公告)日：2021-01-07
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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