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201.发明授权Transmitting apparatus, receiving apparatus, transmission method, and reception method 有权发送装置，接收装置，发送方法和接收方法公开(公告)号：US09473268B2
公开(公告)日：2016-10-18
申请号：US14529802
申请日：2014-10-31
Inventor： Yutaka Murakami , Katsuaki Abe , Masayuki Orihashi , Akihiko Matsuoka
CPC classification number: H04L1/0041 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0039 , H04L1/0058 , H04L1/0079 , H04L1/0083 , H04L1/08 , H04L27/0008 , H04L27/0012 , H04L27/20 , H04L27/2608 , Y02D50/10
Abstract: A transmission frame generating device includes a control information signal generator and a frame former. The control information signal generator generates a modulation method information signal indicating a modulation method of a data signal and an error correction method information signal indicating an error correction method of the data signal. The frame former forms the transmission frame by repeating and discretely arranging the same modulation method information signal on a first multiple of a plurality of subcarriers on a frequency axis and by repeating and discretely arranging the same error correction method information signal on a second multiple of the plurality of the subcarriers on the frequency axis.
Abstract translation: 传输帧生成装置包括控制信息信号发生器和帧形成器。 控制信息信号发生器产生指示数据信号的调制方法的调制方法信息信号和指示数据信号的纠错方法的纠错方法信息信号。 帧载体通过在频率轴上的多个副载波的第一倍数上重复并离散地布置相同的调制方式信息信号，并通过重复并离散地布置相同的纠错方法信息信号来形成传输帧， 频率轴上的多个副载波。
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公开(公告)号：US20160248605A1
公开(公告)日：2016-08-25
申请号：US15145703
申请日：2016-05-03
Inventor： Yutaka Murakami , Masayuki Orihashi , Akihiko Matsuoka
CPC classification number: H04L25/0204 , H04B7/0413 , H04B7/06 , H04B7/0626 , H04B7/0632 , H04B7/0671 , H04B7/0689 , H04B7/0697 , H04B7/082 , H04L1/0618 , H04L5/0023 , H04L5/003 , H04L5/0048 , H04L25/0206 , H04L27/04 , H04L27/06 , H04L27/12 , H04L27/14 , H04L27/18 , H04L27/2601 , H04L27/2602 , H04L27/2627 , H04L27/2649 , H04L27/2657 , H04L27/2659 , H04L27/2691 , H04L27/2695 , H04L69/22 , H04W52/52 , H04W72/0453
Abstract: A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.
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公开(公告)号：US09425874B2
公开(公告)日：2016-08-23
申请号：US14703009
申请日：2015-05-04
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: 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
Abstract: 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.
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公开(公告)号：US09401776B2
公开(公告)日：2016-07-26
申请号：US14820922
申请日：2015-08-07
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: H04B7/0482 , H04B7/0413 , H04B7/0456 , H04B7/0617 , H04B7/0871 , H04L1/0003 , H04L1/0014 , H04L25/03171 , H04L25/03343 , H04L27/3405 , H04L2025/03426 , H04L2025/03808 , H04W72/0413 , H04W72/042 , H04W72/044
Abstract: 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.
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公开(公告)号：US09300381B2
公开(公告)日：2016-03-29
申请号：US14876866
申请日：2015-10-07
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
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.
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Patent Agency Ranking
公开(公告)号：US09281883B2
公开(公告)日：2016-03-08
申请号：US14848936
申请日：2015-09-09
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: 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
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：US09252855B2
公开(公告)日：2016-02-02
申请号：US14502447
申请日：2014-09-30
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
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：US09246518B2
公开(公告)日：2016-01-26
申请号：US14244579
申请日：2014-04-03
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：US09236923B2
公开(公告)日：2016-01-12
申请号：US14617292
申请日：2015-02-09
Inventor： Yutaka Murakami , Tomohiro Kimura , Mikihiro Ouchi
CPC classification number: 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
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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210.发明授权公开(公告)号：US09094044B2
公开(公告)日：2015-07-28
申请号：US14584579
申请日：2014-12-29
Inventor： Yutaka Murakami , Shutai Okamura
CPC classification number: H03M13/116 , H03M13/005 , H03M13/1125 , H03M13/15 , H03M13/616 , H03M13/6362 , H03M13/6527 , H04L1/0041
Abstract: Disclosed are an encoder, a transmitting device, a coding method and a transmission method with which the transmission amount is reduced and a deterioration in transmission efficiency is suppressed while improving reception quality when QC-LDPC or a like block coding is used. A puncture pattern setting unit searches for a puncture pattern for each integral multiple of the number of columns or for each divisor of the number of columns of a sub block matrix that forms a check matrix (H) of a QC-LDPC code, and a puncture unit (data reduction unit) switches the puncture pattern for each integral multiple of the number of columns or for each divisor of the number of columns of the sub block matrix that forms the check matrix of the QC-LDPC code.
Abstract translation: 公开了一种在使用QC-LDPC或类似块编码的同时提高接收质量的编码器，发送装置，编码方法和传输方法，其中发送量减少并且抑制了传输效率的劣化。 穿刺图案设置单元针对形成QC-LDPC码的校验矩阵（H）的子块矩阵的列数的每个整数倍或每个除数的列数的每个整数倍搜索穿孔图案，并且 穿刺单元（数据缩小单元）对形成QC-LDPC码的校验矩阵的子块矩阵的列数的每个整数倍的每个整数倍或每个除数的每个整数倍切换穿孔图案。
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