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公开(公告)号：US09847793B2
公开(公告)日：2017-12-19
申请号：US14968350
申请日：2015-12-14
Inventor： Yutaka Murakami , Kiyotaka Kobayashi , Choo Eng Yap
CPC classification number: H03M13/1105 , H03M13/1102 , H03M13/1157 , H03M13/1174 , H03M13/1177 , H03M13/2909 , H04B7/0413 , H04L1/0045 , H04L1/0057 , H04L1/0061 , H04L1/06 , H04L1/1816 , H04L1/1893 , H04L5/0023 , H04L5/0037 , H04L5/0044
Abstract: In a multi-antenna communication system using LDPC codes, a simple method is used to effectively improve the received quality by performing a retransmittal of less data without restricting applicable LDPC codes. In a case of a non-retransmittal, a multi-antenna transmitting apparatus transmits, from two antennas, LDPC encoded data formed by LDPC encoding blocks. In a case of a retransmittal, the multi-antenna transmitting apparatus uses a transmission method, in which the diversity gain is higher than in the previous transmission, to transmit only a part of the LDPC encoded data as previously transmitted. For example, the only the part of the LDPC encoded data to be re-transmitted is transmitted from the single antenna.
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公开(公告)号：US09628165B2
公开(公告)日：2017-04-18
申请号：US15077120
申请日：2016-03-22
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC: H04K1/10 , H04L27/28 , H04B7/06 , H04B7/0456 , H04W52/42 , H04B7/0413 , H04B7/0426 , H04B7/04 , H04B7/08 , H04L25/03 , H04J11/00
CPC classification number: H04B7/0697 , H04B7/0413 , H04B7/0426 , H04B7/0456 , H04B7/046 , H04B7/0465 , H04B7/0617 , H04B7/0682 , H04B7/0862 , H04J11/0033 , H04L25/0391 , H04W52/42
Abstract: A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation scheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.
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公开(公告)号：US09571131B2
公开(公告)日：2017-02-14
申请号：US15018195
申请日：2016-02-08
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04B7/0602 , H04B1/0096 , H04B7/0413 , H04B7/0456 , H04B7/0682 , H04B17/0085 , H04B17/12 , H04J11/0033 , H04L12/189 , H04L27/36 , H04L27/38 , H04L65/4076 , H04W52/225
Abstract: A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation.
Abstract translation: 以公共频率同时发送第一调制信号和第二调制信号的传输方法使用固定预编码矩阵对两个信号执行预编码，并且定期地改变至少一个信号的相位。 执行相变的信号生成处理和不执行相位变化的信号生成处理之一是可选择的，从而提高信号生成的通用性。
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公开(公告)号：US09543990B2
公开(公告)日：2017-01-10
申请号：US15018195
申请日：2016-02-08
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
Abstract: A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation.
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85.发明授权Transmission method, transmission device, reception method and reception device 有权发送方式，发送装置，接收方式和接收装置公开(公告)号：US09520934B2
公开(公告)日：2016-12-13
申请号：US15134014
申请日：2016-04-20
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC: H04B7/06
CPC classification number: H04L27/2604 , H04B7/0413 , H04B7/06 , H04B7/0682 , H04B7/0697 , H04B7/08 , H04L1/005 , H04L1/0071 , H04L27/3405 , H04L27/3416 , H04L27/36 , H04L27/38
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.
Abstract translation: 传输方法包括映射处理，相变处理和传输处理。 在映射处理中，使用第一映射方式生成多个第一调制信号和多个第二调制信号，并且使用第二映射方案生成多个第三调制信号和多个第四调制信号。 在相变处理中，使用全部N种相位对多个第二调制信号和多个第四调制信号进行相位变化。 在发送处理中，第一调制信号和第二调制信号分别以相同的频率和相同的时间从不同的天线发送，并且第三调制信号和第四调制信号分别以相同的频率和相同的时间发送 从不同的天线。
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Patent Agency Ranking
公开(公告)号：US09515712B2
公开(公告)日：2016-12-06
申请号：US15016718
申请日：2016-02-05
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04B7/0465 , H04B1/713 , H04B7/0456 , H04B7/0469 , H04B7/0615 , H04L1/0009 , H04L1/005 , H04L1/0643 , H04L1/20
Abstract: Disclosed is a precoding method comprising the steps of: generating a first coded block and a second coded block with use of a predetermined error correction block coding scheme; generating a first precoded signal z1 and a second precoded signal z2 by performing a precoding process, which corresponds to a matrix selected from among the N matrices F[i], on a first baseband signal s1 generated from the first coded block and a second baseband signal s2 generated from the second coded block, respectively; the first precoded signal z1 and the second precoded signal z2 satisfying (z1, z2)T=F[i] (s1, s2)T; and changing both of or one of a power of the first precoded signal z1 and a power of the second precoded signal z2, such that an average power of the first precoded signal z1 is less than an average power of the second precoded signal z2.
Abstract translation: 公开了一种预编码方法，包括以下步骤：利用预定的纠错块编码方案产生第一编码块和第二编码块; 通过对从第一编码块产生的第一基带信号s1和第二编码块产生第一基带信号s1，执行对应于从N个矩阵F [i]中选择的矩阵的预编码处理，生成第一预编码信号z1和第二预编码信号z2 分别从第二编码块产生的信号s2; 第一预编码信号z1和第二预编码信号z2满足（z1，z2）T = F [i]（s1，s2）T; 并且改变第一预编码信号z1的功率和第二预编码信号z2的功率中的两者或一者，使得第一预编码信号z1的平均功率小于第二预编码信号z2的平均功率。
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公开(公告)号：US09391640B2
公开(公告)日：2016-07-12
申请号：US14926539
申请日：2015-10-29
Inventor： Yutaka Murakami
CPC classification number: H03M13/255 , H03M13/036 , H03M13/09 , H03M13/1111 , H03M13/1154 , H03M13/23 , H03M13/256 , H03M13/616 , H03M13/617 , H03M13/635
Abstract: An encoding method generates an encoded sequence by performing encoding of a given coding rate according to a predetermined parity check matrix. The predetermined parity check matrix is a first parity check matrix or a second parity check matrix. The first parity check matrix corresponds to a low-density parity check (LDPC) convolutional code using a plurality of parity check polynomials. The second parity check matrix is generated by performing at least one of row permutation and column permutation with respect to the first parity check matrix. An eth parity check polynomial that satisfies zero, of the LDPC convolutional code, is expressible by using a predetermined mathematical formula.
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公开(公告)号：US09344171B2
公开(公告)日：2016-05-17
申请号：US14804733
申请日：2015-07-21
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04B7/046 , H04B7/0417 , H04B7/0456 , H04B7/0478 , H04L1/0042 , H04L1/007 , H04L5/0007 , H04L5/0023 , H04L5/0046 , H04L5/0048 , H04L5/0053 , H04L25/0391 , H04L25/03942 , H04L25/4906 , H04L27/2032 , H04L27/22 , H04L27/2601 , H04L27/2602
Abstract: Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N−1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots.
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公开(公告)号：US09306602B2
公开(公告)日：2016-04-05
申请号：US14722767
申请日：2015-05-27
Inventor： Yutaka Murakami
CPC classification number: H03M13/255 , H03M13/036 , H03M13/09 , H03M13/1111 , H03M13/1154 , H03M13/23 , H03M13/256 , H03M13/616 , H03M13/617 , H03M13/635
Abstract: An encoding method generates an encoded sequence by performing encoding of a given coding rate according to a predetermined parity check matrix. The predetermined parity check matrix is a first parity check matrix or a second parity check matrix. The first parity check matrix corresponds to a low-density parity check (LDPC) convolutional code using a plurality of parity check polynomials. The second parity check matrix is generated by performing at least one of row permutation and column permutation with respect to the first parity check matrix. An eth parity check polynomial that satisfies zero, of the LDPC convolutional code, is expressible by using a predetermined mathematical formula.
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公开(公告)号：US09160491B2
公开(公告)日：2015-10-13
申请号：US14094420
申请日：2013-12-02
Inventor： Yutaka Murakami , Kiyotaka Kobayashi , Masayuki Orihashi , Akihiko Matsuoka
IPC: H04L27/06 , H04L1/06 , H04N19/39 , H04L1/00 , H04L25/06 , H04L27/34 , H04L27/38 , H04B7/04 , H04B7/08 , H04L25/03
CPC classification number: H04L1/06 , H04B7/0413 , H04B7/0854 , H04L1/0054 , H04L1/006 , H04L1/007 , H04L25/03305 , H04L25/03324 , H04L25/03891 , H04L25/061 , H04L27/3488 , H04L27/38 , H04L2025/03611 , H04N19/39
Abstract: A transmitting apparatus and method transmits different modulated signals from a plurality of antennas, and employs a configuration that includes a modulation section that obtains a modulated signal by performing signal point mapping of transmit bits using a signal point arrangement that is divided into a plurality of signal point sets on the IQ plane, whereby the minimum distance between signal points within a signal point set is smaller than the minimum signal point distance between signal point sets; and an antenna that transmits a modulated signal obtained by the modulation section. A signal point generating apparatus generates a first and second symbols to be transmitted by first and second antennas, respectively.
Abstract translation: 一种发送装置和方法从多个天线发送不同的调制信号，并且采用包括通过使用信号点布置来执行发送比特的信号点映射来获得调制信号的调制部分的配置，该信号点布置被划分为多个信号 在IQ平面上的点集合，由此信号点集合内的信号点之间的最小距离小于信号点集之间的最小信号点距离; 以及发送由调制部获得的调制信号的天线。 信号点生成装置生成分别由第一和第二天线发送的第一和第二符号。
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