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公开(公告)号：US09325396B2
公开(公告)日：2016-04-26
申请号：US14567314
申请日：2014-12-11
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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142.发明授权公开(公告)号：US09300437B2
公开(公告)日：2016-03-29
申请号：US14079988
申请日：2013-11-14
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: Problem: 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: 问题：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：US09197303B2
公开(公告)日：2015-11-24
申请号：US14617292
申请日：2015-02-09
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
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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144.发明授权Transmission method, transmitter apparatus, reception method and receiver apparatus 有权发送方法，发送装置，接收方法和接收装置公开(公告)号：US09184816B2
公开(公告)日：2015-11-10
申请号：US14697882
申请日：2015-04-28
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC: H04B7/04
CPC classification number: 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
Abstract: 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.
Abstract translation: 在用于从多个天线同时发送多个调制信号的传输方法中直接主导的环境中，传输质量得到改善。 在调制信号的数据传输中使用的所有数据符号通过预编码矩阵之间的跳变进行预编码，使得用于预编码每个数据符号的预编码矩阵和用于预编码与频域中的数据符号相邻的数据符号的预编码矩阵，以及 时域完全不同 发送其中布置有这样的数据符号的调制信号。
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公开(公告)号：US09178650B2
公开(公告)日：2015-11-03
申请号：US14382879
申请日：2013-12-27
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04L1/0004 , H03M13/255 , H04B7/0413 , H04L1/0003 , H04L1/003 , H04L1/0057 , H04L1/0067 , H04L1/0071 , H04L1/08 , H04L5/005
Abstract: An encoder outputs a first bit sequence having N bits. A mapper generates a first complex signal s1 and a second complex signal s2 with use of bit sequence having X+Y bits included in an input second bit sequence, where X indicates the number of bits used to generate the first complex signal s1, and Y indicates the number of bits used to generate the second complex signal s2. A bit length adjuster is provided after the encoder, and performs bit length adjustment on the first bit sequence such that the second bit sequence has a bit length that is a multiple of X+Y, and outputs the first bit sequence after the bit length adjustment as the second bit sequence. As a result, a problem between a codeword length of a block code and the number of bits necessary to perform mapping by a set of modulation schemes is solved.
Abstract translation: 编码器输出具有N位的第一比特序列。 映射器使用包含在输入第二位序列中的具有X + Y位的位序列来生成第一复信号s1和第二复信号s2，其中X表示用于产生第一复信号s1的位数，Y 表示用于生成第二复合信号s2的位数。 在编码器之后提供比特长度调节器，并对第一比特序列执行比特长度调整，使得第二比特序列具有作为X + Y的倍数的比特长度，并且在比特长度调整之后输出第一比特序列 作为第二位序列。 结果，解决了块码的码字长度与通过一组调制方式进行映射所必需的位数之间的问题。
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Patent Agency Ranking
公开(公告)号：US09059743B2
公开(公告)日：2015-06-16
申请号：US13872787
申请日：2013-04-29
Inventor： Yutaka Murakami , Shutai Okamura , Kiyotaka Kobayashi , Masayuki Orihashi
CPC classification number: H04L1/0041 , H03M13/13 , H03M13/255 , H03M13/2721 , H03M13/2909 , H04L1/0003 , H04L1/0057 , H04L1/0071 , H04L1/0656 , H04L5/0023
Abstract: A transmitter apparatus wherein a relatively simple structure is used to suppress burst errors without changing the block sizes of encoded blocks even when the number of modulation multi-values is increased. An encoding part subjects transport data to a block encoding process to form block encoded data. A modulating part modulates the block encoded data to form data symbols; and an arranging (interleaving) part arranges(interleaves) the block encoded data in such a manner that the intra-block encoded data of the encoded blocks, which include their respective single different data symbol, get together, and then supplies the arranged(interleaved) block encoded data to the modulating part. In this way, there can be provided a transmitter apparatus wherein a relatively simple structure is used to suppress burst errors without changing the block sizes of encoded blocks even when the number of modulation multi-values is increased.
Abstract translation: 一种发射机装置，即使当调制多值的数量增加时，使用相对简单的结构来抑制突发错误，而不改变编码块的块大小。 编码部分将传输数据转移到块编码处理以形成块编码数据。 调制部分调制块编码数据以形成数据符号; 并且排列（交织）部分以这样的方式布置（交织）块编码数据，使得包括它们各自的单个不同数据符号的编码块的块内编码数据在一起，然后提供所安排的（交织的 ）块编码数据到调制部分。 以这种方式，可以提供一种发射机装置，即使当调制多值的数量增加时，使用相对简单的结构来抑制突发错误，而不改变编码块的块大小。
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147.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：US09048985B2
公开(公告)日：2015-06-02
申请号：US14447027
申请日：2014-07-30
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.
Abstract translation: 提供了一种预编码方法，用于从多个基带信号中同时生成要在相同频率带宽上发送的多个预编码信号，包括以下步骤：从N个矩阵中选择矩阵F [i]，其中 定义对多个基带信号执行的预编码，同时在N个矩阵之间切换，i是0到N-1的整数，N是至少为2的整数，产生第一预编码信号z1和第二预编码信号z2， 使用预定的纠错块编码方法生成第一编码块和第二编码块，从第一编码块生成具有M个符号的基带信号和具有M个符号的基带信号的第二编码块，并且对所生成的 基带信号以产生具有M个时隙的预编码信号。
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公开(公告)号：US20150010103A1
公开(公告)日：2015-01-08
申请号：US14382879
申请日：2013-12-27
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04L1/0004 , H03M13/255 , H04B7/0413 , H04L1/0003 , H04L1/003 , H04L1/0057 , H04L1/0067 , H04L1/0071 , H04L1/08 , H04L5/005
Abstract: An encoder outputs a first bit sequence having N bits. A mapper generates a first complex signal s1 and a second complex signal s2 with use of bit sequence having X+Y bits included in an input second bit sequence, where X indicates the number of bits used to generate the first complex signal s1, and Y indicates the number of bits used to generate the second complex signal s2. A bit length adjuster is provided after the encoder, and performs bit length adjustment on the first bit sequence such that the second bit sequence has a bit length that is a multiple of X+Y, and outputs the first bit sequence after the bit length adjustment as the second bit sequence. As a result, a problem between a codeword length of a block code and the number of bits necessary to perform mapping by a set of modulation schemes is solved.
Abstract translation: 编码器输出具有N位的第一比特序列。 映射器使用包含在输入第二位序列中的具有X + Y位的位序列来生成第一复信号s1和第二复信号s2，其中X表示用于产生第一复信号s1的位数，Y 表示用于生成第二复合信号s2的位数。 在编码器之后提供比特长度调节器，并对第一比特序列执行比特长度调整，使得第二比特序列具有作为X + Y的倍数的比特长度，并且在比特长度调整之后输出第一比特序列 作为第二位序列。 结果，解决了块码的码字长度与通过一组调制方式进行映射所必需的位数之间的问题。
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公开(公告)号：US12231195B2
公开(公告)日：2025-02-18
申请号：US18338183
申请日：2023-06-20
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
IPC: H04B7/0456 , H04L5/00 , H04W72/21 , H04W72/23 , G06F17/16
Abstract: A precoding process is performed on a first baseband signal and a second baseband signal to generate a first precoding signal and a second precoding signal. A pilot signal is inserted into the first precoding signal and phase change is performed on the second precoding signal. A pilot signal is inserted into the phase changed second precoding signal, and phase change is further performed on the phase-changed second precoding signal with the pilot signal inserted.
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公开(公告)号：US12231165B2
公开(公告)日：2025-02-18
申请号：US18093005
申请日：2023-01-04
Inventor： Yutaka Murakami
IPC: H04B10/116 , A61F5/01 , H04B10/114 , H04L9/40 , H04W48/08 , H04W48/16 , H04W76/11 , H04W84/12
Abstract: Provided is a device, which is a transmission device that can improve performance, that includes: a light source; and a transmitter that generates a modulated signal based on an input signal and transmits the modulated signal from the light source as visible light by changing a luminance of the light source in accordance with the modulated signal. The transmitter includes, in the modulated signal, a plurality of items of information related to service set identifiers (SSIDs) of a plurality of mutually different access points in a wireless local area network (LAN), and transmits the modulated signal from the light source.
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