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公开(公告)号：US20210306007A1
公开(公告)日：2021-09-30
申请号：US17341875
申请日：2021-06-08
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
Abstract: One coding scheme is selected from a plurality of coding schemes, an information sequence is encoded by using the selected coding scheme, and an obtained encoded sequence is modulated to obtain a modulated signal. The obtained modulated signal is subjected to a phase change and is transmitted. The plurality of coding schemes include at least a first coding scheme and a second coding scheme. The first coding scheme is a coding scheme with a first coding rate for forming a generated first codeword as a first encoded sequence by using a first parity check matrix. The second coding scheme is a coding scheme with a second coding rate obtained after puncturing processing, for generating a second encoded sequence by performing the puncturing processing on a generated second codeword by using a second parity check matrix different from the first parity check matrix. The number of bits of the first encoded sequence is equal to the number of bits of the second encoded sequence.
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公开(公告)号：US20190165885A1
公开(公告)日：2019-05-30
申请号：US16261881
申请日：2019-01-30
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L1/0041 , H03M13/1102 , H03M13/6362 , H03M13/6516 , H04L1/0057 , H04L1/0068
Abstract: One coding method is selected from a plurality of coding methods per data symbol group, an information sequence is encoded by using the selected coding method. The plurality of coding methods includes at least a first coding method and a second coding method. The first coding method is a coding method with a first coding rate for generating a first codeword as a first encoded sequence by using a first parity check matrix. The second coding method is a coding method with a second coding rate different from the first coding rate and obtained after puncturing processing, where a second encoded sequence is generated by performing the puncturing processing on a second codeword by using a second parity check matrix different from the first parity check matrix. A number of bits of the first encoded sequence is equal to a number of bits of the second encoded sequence.
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3.发明申请OFDM TRANSMITTER DEVICE HAVING A SYMBOL GENERATOR FOR GENERATING NON-ZERO CONTROL SYMBOLS, AND OFDM TRANSMISSION METHOD INCLUDING GENERATING NON-ZERO CONTROL SYMBOLS 审中-公开具有用于生成非零控制符号的符号发生器的OFDM发射机装置和包括生成非零控制符号的OFDM传输方法公开(公告)号：US20150188744A1
公开(公告)日：2015-07-02
申请号：US14657158
申请日：2015-03-13
Inventor： Yoshinobu MATSUMURA , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04L27/26
CPC classification number: H04L27/2647 , H04L5/0048 , H04L27/2607 , H04L27/2613 , H04L27/2649 , H04L27/2662 , H04L27/2675 , H04L27/2698
Abstract: An OFDM transmitter and an OFDM receiver respectively transmit and receive N (N≧2, N is an integer) control symbols. For each control symbol, a guard interval time-domain signal is, for example, identical to a signal obtained by frequency-shifting at least a portion of a useful symbol time-domain signal by an amount different from any other symbol, or to a signal obtained by frequency-shifting one or both of a portion and a span of a useful symbol interval time-domain signal different from any other symbol by a predetermined amount.
Abstract translation: OFDM发射机和OFDM接收机分别发送和接收N（N≥2，N是整数）控制符号。 对于每个控制符号，保护间隔时域信号例如与通过将有用符号时域信号的至少一部分频移到不同于任何其它符号的量而获得的信号相同，或者与 通过将与任何其他符号不同的有用符号间隔时域信号的一部分和跨度中的一个或两个频移位预定量而获得的信号。
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公开(公告)号：US20190028165A1
公开(公告)日：2019-01-24
申请号：US16070123
申请日：2016-06-14
Inventor： Naoki ADACHI , Tomohiro KIMURA , Takayuki SOTOYAMA , Kazuaki TAKAHASHI , Naganori SHIRAKATA , Koji TAKINAMI , Takenori SAKAMOTO
Abstract: A transmission device transmits multiplexed signals obtained by multiplexing signals of N systems corresponding to N Orbital Angular Momentum (OAM) propagation modes. The transmission device includes: an array antenna that includes M antenna elements disposed in a lattice on a plane when viewed from the plane; and a transmitter that multiplies signals obtained by branching each of the signals of N systems into M signals by weighting coefficients of phase shift angles based on angles of the respective M antenna elements with respect to a reference axis passing through a reference point viewed from the reference point on the plane according to the OAM propagation modes, multiplexes the signals of N systems multiplied by the weighting coefficients of the phase shift angles, and transmits signals obtained by the multiplexing from the M antenna elements. M and N are integers equal to or larger than 2.
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Patent Agency Ranking
公开(公告)号：US20160020881A1
公开(公告)日：2016-01-21
申请号：US14868877
申请日：2015-09-29
Inventor： Mihail PETROV , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L5/0048 , H04B7/02 , H04B7/0613 , H04L25/0224 , H04L27/2611 , H04L27/2613 , H04L27/2627 , H04L27/2649
Abstract: The present invention relates to orthogonal frequency-division multiplexing (OFDM) communication systems with four transmit antennas and one or more receive antennas, and in particular to methods for inserting scattered pilots (SPs) into the transmit signals of such OFDM systems, for estimating channel properties on the basis of the scattered pilots, a multi-antenna OFDM transmitter, and an OFDM receiver. In this context, it is the particular approach of the present invention to keep the same SP pattern like in the single-transmitter case, to partition the pilots into as many subsets as there are transmitters (transmit antennas), and to interleave these subsets both in time and in frequency. In this manner, the granularity of pilots of the same subset is reduced. This offers increased flexibility in designing the scattered pilot patterns and greater accuracy of the estimated channel properties.
Abstract translation: 本发明涉及具有四个发射天线和一个或多个接收天线的正交频分复用（OFDM）通信系统，特别涉及用于将散射导频（SP）插入到这种OFDM系统的发射信号中的方法，用于估计信道 基于散射导频的属性，多天线OFDM发射机和OFDM接收机。 在这种情况下，本发明的特定方法是在单发射机情况下保持相同的SP模式，以将导频划分成与发射机（发射天线）一样多的子集，并且将这些子集两者交织 在时间和频率上。 以这种方式，减少了相同子集的导频的粒度。 这提供了设计分散导频模式和估计信道特性的更高精度的更大灵活性。
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公开(公告)号：US20190253189A1
公开(公告)日：2019-08-15
申请号：US16391939
申请日：2019-04-23
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
Abstract: A decoding device includes: a BP decoder that performs BP decoding on an input signal; a maximum likelihood decoder that performs maximum likelihood decoding on a signal subjected to the BP decoding; and a selector that selects one of the input signal, the signal subjected to the BP decoding, and a signal subjected to the maximum likelihood decoding. In a configuration of the decoding device, when a decoder is appropriately operated according to quality of data, a calculation scale can be reduced, and power consumption can be decreased.
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公开(公告)号：US20190158121A1
公开(公告)日：2019-05-23
申请号：US16254950
申请日：2019-01-23
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
Abstract: One coding scheme is selected from a plurality of coding schemes, an information sequence is encoded by using the selected coding scheme, and an obtained encoded sequence is modulated to obtain a modulated signal. The obtained modulated signal is subjected to a phase change and is transmitted. The plurality of coding schemes include at least a first coding scheme and a second coding scheme. The first coding scheme is a coding scheme with a first coding rate for forming a generated first codeword as a first encoded sequence by using a first parity check matrix. The second coding scheme is a coding scheme with a second coding rate obtained after puncturing processing, for generating a second encoded sequence by performing the puncturing processing on a generated second codeword by using a second parity check matrix different from the first parity check matrix. The number of bits of the first encoded sequence is equal to the number of bits of the second encoded sequence.
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公开(公告)号：US20190020434A1
公开(公告)日：2019-01-17
申请号：US16069850
申请日：2016-06-13
Inventor： Naoki ADACHI , Tomohiro KIMURA , Takayuki SOTOYAMA , Kazuaki TAKAHASHI , Naganori SHIRAKATA , Koji TAKINAMI , Takenori SAKAMOTO
IPC: H04J11/00
CPC classification number: H04J11/00 , H04J2011/0003 , H04L5/04 , H04L27/06
Abstract: A transmission device includes: a modulator that selects an Orbital Angular Momentum (OAM) propagation mode among N (N is an integer equal to or greater than 2) OAM propagation modes in accordance with a value of bit data to be transmitted; and a transmitter that transmits a signal of the OAM propagation mode selected by the modulator.
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公开(公告)号：US20160037192A1
公开(公告)日：2016-02-04
申请号：US14847361
申请日：2015-09-08
Inventor： Mihail PETROV , Frank HERRMANN , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04N21/236 , H04L29/06 , H04N21/4385 , H04N21/434 , H04N21/61 , H04N21/2389
CPC classification number: H04N21/23608 , H04L49/9057 , H04L49/9094 , H04L69/04 , H04L69/22 , H04N21/2389 , H04N21/4344 , H04N21/4385 , H04N21/6112
Abstract: A demultiplexer 630 routes only one or more transport stream packets with a single packet identifier value to each physical layer pipe. A header compression unit 620 replaces the packet identifier of the transport stream packet with a short packet identifier of one bit length indicating at least whether the transport stream packet is a NULL packet.
Abstract translation: 解复用器630仅将具有单个分组标识符值的一个或多个传输流分组路由到每个物理层管道。 报头压缩单元620用至少指示传输流分组是否为空分组的一比特长度的短分组标识来替换传输流分组的分组标识符。
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