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公开(公告)号：US20160204846A1
公开(公告)日：2016-07-14
申请号：US15077120
申请日：2016-03-22
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
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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182.发明申请公开(公告)号：US20160164640A1
公开(公告)日：2016-06-09
申请号：US15046939
申请日：2016-02-18
Inventor： Yutaka MURAKAMI
CPC classification number: H04L1/08 , G06F11/10 , H04L1/0041 , H04L1/0057 , H04L1/0061 , H04L1/0068 , H04L1/0071 , H04L1/1607 , H04L1/1819 , H04L1/1825 , H04L1/1845 , H04L1/1887 , H04L2001/0093 , H04L2001/0097
Abstract: A packet error rate in a receiver needs to be effectively reduced.Solution to Problem: A transmitter 11 inserts error detection codes into information packets on one-to-one basis, at a certain layer at which signal processing is performed earlier than at a physical layer, to obtain first information packets. The transmitter 11 codes the first information packets at the physical layer to obtain second information packets, and transmits the second information packets. At the certain layer, the transmitter 11 generates parity packets by coding the information packets and inserts the error detection codes into the parity packets on one-to-one basis to obtain first parity packets. The transmitter codes the first parity packets at the physical layer to obtain second parity packets. The transmitter 11 transmits the second parity packets in accordance with a transmission request from each of one or more receivers.
Abstract translation: 接收机中的数据包错误率需要有效降低。 问题的解决方案：发射机11在比物理层更早执行信号处理的特定层，以一对一的方式将错误检测码插入到信息分组中，以获得第一信息分组。 发射机11对物理层的第一信息分组进行编码，获得第二信息分组，发送第二信息分组。 在特定层，发射机11通过对信息分组进行编码来生成奇偶校验分组，并将错误检测码一一对应地插入到奇偶分组中，以获得第一奇偶分组。 发射机对物理层的第一个奇偶校验分组进行编码，以获得第二个奇偶校验分组。 发射机11根据来自一个或多个接收机中的每一个的发送请求发送第二奇偶分组。
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公开(公告)号：US20160149624A1
公开(公告)日：2016-05-26
申请号：US14980186
申请日：2015-12-28
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04B7/04
CPC classification number: H04B7/0456 , H04B7/0413 , H04B7/0617
Abstract: A transmission method 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, thereby improving received data signal quality for a reception device.
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公开(公告)号：US20160099725A1
公开(公告)日：2016-04-07
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.
Abstract translation: 在使用LDPC码的多天线通信系统中，使用简单的方法通过在不限制可应用的LDPC码的情况下执行更少数据的重传来有效地提高接收质量。 在非重发的情况下，多天线发送装置从两个天线发送由LDPC编码块形成的LDPC编码数据。 在重传的情况下，多天线发送装置使用分集增益高于先前发送的发送方法，仅发送如前所述的LDPC编码数据的一部分。 例如，从单个天线发送仅重新发送的LDPC编码数据的一部分。
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公开(公告)号：US20160056872A1
公开(公告)日：2016-02-25
申请号：US14932070
申请日：2015-11-04
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04B7/0456 , H04L1/0045 , H04L1/0075 , H04L25/03942 , H04L25/03955
Abstract: A transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.
Abstract translation: 一种用于同时发送相同频率的第一调制信号和第二调制信号的传输方案。 根据传输方案，预编码权重乘法单元在第一映射之后将预编码权重乘以基带信号和在第二映射之后将基带信号相乘，并输出第一调制信号和第二调制信号。 在预编码权重乘法单元中，规则地跳跃预编码权重。
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Patent Agency Ranking
186.发明申请TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEIVING DEVICE AND RECEIVING METHOD 审中-公开传输设备，传输方法，接收设备和接收方法公开(公告)号：US20150381256A1
公开(公告)日：2015-12-31
申请号：US14843349
申请日：2015-09-02
Inventor： Mikihiro OUCHI , Yutaka MURAKAMI , Tomohiro KIMURA
CPC classification number: H04B7/0689 , H04B7/024 , H04B7/0469 , H04B7/0871 , H04B7/10 , H04L1/005 , H04L1/0055 , H04L1/0057 , H04L1/0065 , H04L1/0643 , H04L25/0204 , H04L25/0222 , H04L25/03891 , H04L25/0391 , H04L27/38 , H04L2001/0097
Abstract: Provided is a frame configuration usable for both SISO transmission and MISO and/or MIMO transmission. A frame configurator of a transmission device configures a frame by gathering data for SISO and configures a frame by gathering data for MISO and/or MIMO data, thereby to improve the reception performance (detection performance) of a reception device.
Abstract translation: 提供了可用于SISO传输和MISO和/或MIMO传输的帧配置。 传输设备的帧配置器通过收集SISO的数据来配置帧，并通过收集MISO和/或MIMO数据的数据来配置帧，从而提高接收设备的接收性能（检测性能）。
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公开(公告)号：US20150358970A1
公开(公告)日：2015-12-10
申请号：US14825410
申请日：2015-08-13
Inventor： Yutaka MURAKAMI , Shinichiro TAKABAYASHI , Masayuki ORIHASHI , Akihiko MATSUOKA
CPC classification number: H04L5/0058 , H04B1/692 , H04L1/0001 , H04L1/0003 , H04L5/0007 , H04L5/0021 , H04L5/006 , H04L5/0064 , H04L5/0075 , H04L5/0092 , H04L27/0008 , H04L27/2601 , H04W72/0453
Abstract: A wireless communication method is provided for a transmission apparatus that transmits an OFDM (orthogonal frequency division multiplexing) signal using a communication band that comprises a plurality of subcarrier groups each including a plurality of subcarriers. The method includes specifying which subcarrier group and how many subcarriers are to be used to transmit the OFDM signal and determining a configuration of a transmission frame, generating the OFDM signal by mapping data symbols according to the determined configuration of the transmission frame, and transmitting the generated OFDM signal. The number of subcarriers to be used to transmit the OFDM signal is variable, the OFDM signal may be generated using a plurality of modulation schemes including QPSK and 16QAM, and a plurality of mapping patterns are prepared for each of the plurality of modulation schemes.
Abstract translation: 提供一种无线通信方法，用于使用包括多个子载波组的通信频带发送OFDM（正交频分复用）信号的发送装置，每个副载波组包括多个子载波。 该方法包括：确定哪个子载波组和多少个子载波将用于发送OFDM信号，并确定传输帧的配置;通过根据所确定的传输帧的配置映射数据符号来生成OFDM信号，以及发送 生成的OFDM信号。 用于发送OFDM信号的子载波的数量是可变的，可以使用包括QPSK和16QAM的多个调制方案来生成OFDM信号，并且为多个调制方案中的每一个准备多个映射模式。
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公开(公告)号：US20150349803A1
公开(公告)日：2015-12-03
申请号：US14813231
申请日：2015-07-30
Inventor： Yutaka MURAKAMI
CPC classification number: G06F11/10 , H03M13/036 , H03M13/09 , H03M13/1154 , H03M13/118 , H03M13/611 , H03M13/616 , 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.
Abstract translation: 编码方法通过根据预定奇偶校验矩阵执行给定编码率的编码来生成编码序列。 预定奇偶校验矩阵是第一奇偶校验矩阵或第二奇偶校验矩阵。 第一奇偶校验矩阵对应于使用多个奇偶校验多项式的低密度奇偶校验（LDPC）卷积码。 通过相对于第一奇偶校验矩阵执行行置换和列置换中的至少一个来生成第二奇偶校验矩阵。 通过使用预定的数学公式可以表达满足零卷积码的零奇偶校验多项式。
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公开(公告)号：US20150341051A1
公开(公告)日：2015-11-26
申请号：US14432859
申请日：2013-10-02
Inventor： Yutaka MURAKAMI
CPC classification number: H03M13/1111 , G06F11/10 , H03M13/033 , H03M13/036 , H03M13/1105 , H03M13/1154 , H03M13/118 , H03M13/23 , H03M13/235 , H03M13/3988 , H03M13/611 , H03M13/616 , H03M13/617 , H04L1/0041 , H04L1/0058 , H04L1/0059
Abstract: An encoding method of generating an encoded sequence by performing encoding of a given encoding rate based on a predetermined parity check matrix. The predetermined matrix is either 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 that uses a plurality of parity check polynomials, and the second parity check matrix is generated by performing at least one of row permutation and column permutation on the first parity check matrix. A parity check polynomial satisfying zero of the LDPC convolutional code is expressible by using a specific mathematical expression.
Abstract translation: 一种通过基于预定奇偶校验矩阵执行给定编码率的编码来生成编码序列的编码方法。 预定矩阵是第一奇偶校验矩阵或第二奇偶校验矩阵。 第一奇偶校验矩阵对应于使用多个奇偶校验多项式的低密度奇偶校验（LDPC）卷积码，并且通过在第一奇偶校验上执行行排列和列置换中的至少一个来生成第二奇偶校验矩阵 矩阵。 通过使用特定的数学表达式可以表达满足LDPC卷积码的零的奇偶校验多项式。
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公开(公告)号：US20150326294A1
公开(公告)日：2015-11-12
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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