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121. 发明授权

US09054757B2 Signal generating method and signal generating apparatus 有权
标题翻译：信号产生方法和信号发生装置
公开(公告)号：US09054757B2
公开(公告)日：2015-06-09
申请号：US14241130
申请日：2012-09-06
申请人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC分类号： H04B7/04 , H04L5/00
CPC分类号： H04B7/0469 , H04B1/0057 , H04B7/0417 , H04B7/0426 , H04B7/0456 , H04B7/0465 , H04L5/00 , H04L5/0023 , H04L5/0044 , H04L5/0048 , H04L25/0222 , H04L27/20 , H04L27/34 , H04L27/36
摘要： A transmission method for simultaneously transmitting a first modulated signal and a second modulated signal at the same frequency includes performing precoding on both signals using a fixed precoding matrix and regularly changing the phase of at least one of the signals. In this method, the power ratio between a plurality of signals transmitted from a plurality of antennas at the same frequency and at the same time differs from the power ratio between a plurality of pilot signals transmitted from the plurality of antennas at the same frequency and at the same time, whereby the accuracy of channel estimation by a reception device is improved.
摘要翻译：用于以相同频率同时发射第一调制信号和第二调制信号的传输方法包括使用固定预编码矩阵对两个信号执行预编码，并定期改变至少一个信号的相位。在该方法中，以相同频率和同一时间从多个天线发送的多个信号之间的功率比与在相同频率和相同频率下从多个天线发送的多个导频信号之间的功率比不同同时，提高了接收装置的信道估计精度。

122. 发明授权

US09008225B2 Pre-coding method and pre-coding device 有权
标题翻译：预编码方式和预编码装置
公开(公告)号：US09008225B2
公开(公告)日：2015-04-14
申请号：US14111334
申请日：2012-04-18
申请人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC分类号： H04B7/04 , H04L1/00 , H04L1/06 , H04L1/20
CPC分类号： H04B7/0465 , H04B1/713 , H04B7/0456 , H04B7/0469 , H04B7/0615 , H04L1/0009 , H04L1/005 , H04L1/0643 , H04L1/20
摘要： 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.
摘要翻译：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。

123. 发明授权

US08971439B2 Precoding method, precoding device 有权
标题翻译：预编码方法，预编码装置
公开(公告)号：US08971439B2
公开(公告)日：2015-03-03
申请号：US13985707
申请日：2012-02-17
申请人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC分类号： H04B7/02 , H04B7/04 , H04L25/03
CPC分类号： H04B7/0456 , H04B7/0413 , H04B7/0469 , H04B7/0617 , H04L25/03171 , H04L25/03942 , H04L25/03949 , H04L27/18 , H04L27/2626 , H04L27/34
摘要： Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition.
摘要翻译：公开了一种用于从多个基带信号生成同时以相同频带发送的多个预编码信号的预编码方法。根据预编码方法，从定义通过在矩阵之间跳跃对多个基带信号执行的预编码处理的矩阵中选择一个矩阵。与通过使用预定的纠错块编码方案生成的第一编码块和第二编码块相关的第一基带信号和第二基带信号满足给定条件。

124. 发明授权

US08867482B2 Signal generation method and signal generation device 有权
公开(公告)号：US08867482B2
公开(公告)日：2014-10-21
申请号：US13811044
申请日：2011-11-29
申请人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC分类号： H04W4/00 , H04B7/06 , H04L25/06 , H04L25/03 , H04B7/04 , H04L5/00 , H04L25/02
CPC分类号： H04B7/0456 , G06F11/10 , H04B7/0413 , H04B7/0482 , H04B7/0669 , H04B7/0682 , H04B7/0697 , H04L1/0058 , H04L5/005 , H04L25/0224 , H04L25/03898 , H04L25/067 , H04L27/2627 , H04L27/2649 , H04W72/044
摘要： 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.

125. 发明授权

US08732547B2 Transmission apparatus and transmission method 有权
标题翻译：传输装置及传输方式
公开(公告)号：US08732547B2
公开(公告)日：2014-05-20
申请号：US13566694
申请日：2012-08-03
申请人： Yutaka Murakami , Kiyotaka Kobayashi , Choo Eng Yap
发明人： Yutaka Murakami , Kiyotaka Kobayashi , Choo Eng Yap
IPC分类号： H03M13/00
CPC分类号： 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
摘要： 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.
摘要翻译：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。

126. 发明申请

US20130121306A1 SIGNAL GENERATION METHOD AND SIGNAL GENERATION DEVICE 有权
公开(公告)号：US20130121306A1
公开(公告)日：2013-05-16
申请号：US13811044
申请日：2011-11-29
申请人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC分类号： H04B7/06
CPC分类号： H04B7/0456 , G06F11/10 , H04B7/0413 , H04B7/0482 , H04B7/0669 , H04B7/0682 , H04B7/0697 , H04L1/0058 , H04L5/005 , H04L25/0224 , H04L25/03898 , H04L25/067 , H04L27/2627 , H04L27/2649 , H04W72/044
摘要： 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.

127. 发明申请

US20130114752A1 TRANSMISSION METHOD, TRANSMITTER APPARATUS, RECEPTION METHOD AND RECEIVER APPARATUS 有权
公开(公告)号：US20130114752A1
公开(公告)日：2013-05-09
申请号：US13809830
申请日：2011-09-08
申请人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
发明人： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC分类号： H04B7/04
CPC分类号： H04L27/265 , H04B7/0434 , H04B7/0452 , H04B7/0456 , H04B7/046 , H04B7/0473 , H04B7/0617 , H04B7/0697 , H04B7/08 , H04B7/086 , H04B7/12 , H04L1/0003 , H04L1/0009 , H04L1/0045 , H04L1/0047 , H04L1/005 , H04L1/0057 , H04L1/0061 , H04L1/0071 , H04L1/06 , H04L1/0643 , H04L5/0007 , H04L5/001 , H04L5/0023 , H04L5/0026 , H04L5/0048 , H04L25/0204 , H04L25/0222 , H04L25/0226 , H04L25/0248 , H04L25/03942 , H04L25/067 , H04L27/0008 , H04L27/2602 , H04L27/2626 , H04L27/3405 , H04L2001/0093
摘要： Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

128. 发明申请

US20130055049A1 ENCODING METHOD, DECODING METHOD, ENCODER, AND DECODER 有权
标题翻译：编码方法，解码方法，编码器和解码器
公开(公告)号：US20130055049A1
公开(公告)日：2013-02-28
申请号：US13583824
申请日：2012-01-20
申请人： Yutaka Murakami
发明人： Yutaka Murakami
IPC分类号： H03M13/15
CPC分类号： H03M13/373 , H03M13/1154 , H03M13/6356
摘要： An encoding method generates a parity bit sequence by encoding an information sequence with feed-forward LDPC convolutional codes based on a plurality of parity check polynomials each having a coding rate of (n−1)/n, then performs an interleaving process and an accumulation process. The accumulation process is an exclusive OR operation performed on bits of the interleaved parity bit sequence and on bits of a delayed accumulated parity bit sequence. A coded sequence is then generated from the information sequence and the accumulated parity bit sequence.
摘要翻译：编码方法通过基于多个具有编码率（n-1）/ n的奇偶校验多项式对具有前馈LDPC卷积码的信息序列进行编码来生成奇偶校验位序列，然后执行交织处理和累积处理。累积处理是对交织的奇偶校验位序列的比特和延迟的累加奇偶校验位序列的比特执行的异或运算。然后从信息序列和累加的奇偶校验位序列生成编码序列。

129. 发明授权

US08340226B2 Multiantenna receiving device 有权
标题翻译：多天线接收装置
公开(公告)号：US08340226B2
公开(公告)日：2012-12-25
申请号：US13360308
申请日：2012-01-27
申请人： Yutaka Murakami , Shutai Okamura , Takaaki Kishigami
发明人： Yutaka Murakami , Shutai Okamura , Takaaki Kishigami
IPC分类号： H03D1/00
CPC分类号： H04L1/005 , H03M13/11 , H03M13/27 , H03M13/2957 , H04B7/04 , H04L1/1829 , H04L25/03318 , H04L25/067 , H04L2025/03426
摘要： A multiantenna receiving device is provided to make it possible to cope with both improvement in error rate characteristic and simplification in structure. The multiantenna receiving device is comprised of soft judgement output units for carrying out a soft judgement of a modulation signal in accordance with signal point distances between a plurality of candidate signal points with respect to a plurality of multiplexed modulation signals and a receiving signal, decoding units for obtaining digital data of the modulation signals by using the judged results obtained by the soft judgement output units, and signal point decreasing units for decreasing the number of the candidate signal points used in the soft judgement output units by recursively using a part of the digital data except self-modulation signals obtained by the decoding units.
摘要翻译：提供了一种多天线接收装置，以便能够应对错误率特性的提高和结构简化。多天线接收装置包括软判断输出单元，用于根据多个候选信号点与多个复用调制信号和接收信号之间的信号点距离执行调制信号的软判断，解码单元用于通过使用由软判断输出单元获得的判断结果获得调制信号的数字数据，以及信号点减少单元，用于通过递归地使用数字的一部分来减少软判断输出单元中使用的候选信号点的数量除了由解码单元获得的自调制信号之外的数据。

130. 发明授权

US08233571B2 Reception device and reception method 有权
标题翻译：接收设备和接收方式
公开(公告)号：US08233571B2
公开(公告)日：2012-07-31
申请号：US12527654
申请日：2008-02-20
申请人： Hirohito Mukai , Yutaka Murakami , Kiyotaka Kobayashi , Hidekuni Yomo , Yoshinori Kunieda
发明人： Hirohito Mukai , Yutaka Murakami , Kiyotaka Kobayashi , Hidekuni Yomo , Yoshinori Kunieda
IPC分类号： H03D1/00
CPC分类号： H03M13/27 , H04J11/003 , H04L1/005 , H04L1/0071 , H04L27/2626 , H04L27/2647
摘要： A reception device includes reception antennas and an address generation unit that converts a write-in or read-out order of channel estimation values according to a rearrangement rule. A storage unit writes in or reads out channel estimation values in the converted order, and an address generation unit converts a data sequence write-in or read-out order according to the rearrangement rule. A signal storage unit writes in or reads out data sequences in the converted order, and a replica generation unit generates a replica signal by re-modulating the data sequence according to the channel estimation value. A cancel unit successively generates a stream signal in which a data sequence interference signal is cancelled, by using the channel estimation value, the data sequence, and the replica signal.
摘要翻译：接收装置包括接收天线和地址生成单元，其根据重排规则转换信道估计值的写入或读出次序。存储单元以转换的顺序写入或读出信道估计值，地址生成单元根据重排规则转换数据序列写入或读出顺序。信号存储单元以转换的顺序写入或读出数据序列，并且副本生成单元通过根据信道估计值重新调制数据序列来生成复制信号。取消单元通过使用信道估计值，数据序列和复制信号，依次生成数据序列干扰信号被消除的流信号。

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