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241.发明申请公开(公告)号：US20180219658A1
公开(公告)日：2018-08-02
申请号：US15735789
申请日：2016-05-27
Inventor： Yutaka MURAKAMI , Yoshio URABE , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L5/0044 , H04J1/02 , H04J3/02 , H04J11/00 , H04J2011/0016 , H04L1/0075 , H04L5/0007 , H04L5/0053 , H04L27/265
Abstract: A transmitting method includes: configuring a frame using a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, by allocating time resources and frequency resources to a plurality of transmission data; and transmitting the frame, wherein the frame includes a first period in which a preamble which includes information on a frame configuration of the frame is transmitted, and a second period in which the plurality of transmission data are transmitted by at least one of time division and frequency division, and among the plurality of OFDM symbols, OFDM symbols included in the second period include pilot symbols arranged along a time axis with a predetermined spacing therebetween, and a predetermined number of data symbols.
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242.发明申请公开(公告)号：US20180069569A1
公开(公告)日：2018-03-08
申请号：US15808411
申请日：2017-11-09
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.
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公开(公告)号：US20170222853A1
公开(公告)日：2017-08-03
申请号：US15493562
申请日：2017-04-21
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L27/2604 , H04B7/0413 , H04B7/06 , H04B7/0682 , H04B7/0697 , H04B7/08 , H04L1/005 , H04L1/0071 , H04L27/3405 , H04L27/3416 , H04L27/36 , H04L27/38
Abstract: A transmission method includes mapping processing, phase change processing, and transmission processing. In the mapping processing, a plurality of first modulation signals and a plurality of second modulation signals are generated using a first mapping scheme, and a plurality of third modulation signals and a plurality of fourth modulation signals are generated using a second mapping scheme. In the phase change processing, a phase change is performed on the plurality of second modulation signals and the plurality of fourth modulation signals using all N kinds of phases. In the transmission processing, the first modulation signals and the second modulation signals are respectively transmitted at a same frequency and a same time from different antennas, and the third modulation signals and the fourth modulation signals are respectively transmitted at a same frequency and a same time from the different antennas.
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244.发明申请ENCODING APPARATUS, TRANSMISSION APPARATUS, ENCODING METHOD AND TRANSMISSION METHOD 审中-公开编码装置，传输装置，编码方法和传输方法公开(公告)号：US20160233887A1
公开(公告)日：2016-08-11
申请号：US15132971
申请日：2016-04-19
Inventor： Yutaka MURAKAMI
CPC classification number: H03M13/1154 , H03M13/1105 , H03M13/1111 , H03M13/13 , H03M13/157 , H04L1/0041 , H04L1/0057
Abstract: An encoding method and encoder of a time-varying LDPC-CC with high error correction performance are provided. In an encoding method of performing low density parity check convolutional coding (LDPC-CC) of a time varying period of q using a parity check polynomial of a coding rate of (n−1)/n (where n is an integer equal to or greater than 2), the time varying period of q is a prime number greater than 3, the method receiving an information sequence as input and encoding the information sequence using Equation 1 as a g-th (g=0, 1, . . . , q−1) parity check polynomial to satisfy 0.
Abstract translation: 提供了具有高纠错性能的时变LDPC-CC的编码方法和编码器。 在使用编码率为（n-1）/ n的奇偶校验多项式（其中n为等于或等于的整数）的奇偶校验多项式的q时变周期的低密度奇偶校验卷积编码（LDPC-CC）的编码方法中， 大于2），q的时变周期是大于3的质数，该方法接收信息序列作为输入，并且使用等式1将信息序列编码为第g（g = 0,1，...）。 ，q-1）奇偶校验多项式满足0。
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公开(公告)号：US20160156398A1
公开(公告)日：2016-06-02
申请号：US15016718
申请日：2016-02-05
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04B7/04
CPC classification number: H04B7/0465 , H04B1/713 , H04B7/0456 , H04B7/0469 , H04B7/0615 , H04L1/0009 , H04L1/005 , H04L1/0643 , H04L1/20
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20160149625A1
公开(公告)日：2016-05-26
申请号：US15008055
申请日：2016-01-27
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04B7/0456 , H04B7/0469 , H04B7/06 , H04B7/0606 , H04B7/0689 , H04L25/03898
Abstract: Disclosed is 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.
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公开(公告)号：US20160065280A1
公开(公告)日：2016-03-03
申请号：US14939292
申请日：2015-11-12
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
IPC: H04B7/04
CPC classification number: H04B7/0456 , H04B7/0413 , H04B7/0469 , H04B7/0617 , H04L25/03171 , H04L25/03942 , H04L25/03949 , H04L27/18 , H04L27/2626 , H04L27/34
Abstract: 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.
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公开(公告)号：US20160056989A1
公开(公告)日：2016-02-25
申请号：US14781455
申请日：2014-04-10
Inventor： Yutaka MURAKAMI , Tomohiro KIMURA , Mikihiro OUCHI
CPC classification number: H04L27/0008 , H04L27/34 , H04W28/0263
Abstract: Provided is a transmission method that contributes to an increase in data reception quality when iterative detection is performed at a receive apparatus side. A transmit apparatus alternates between two types of modulation scheme that each shift amplitude and phase, performs mapping to constellation points according to a selected modulation scheme, and transmits a modulated signal obtained by mapping.
Abstract translation: 提供了一种在接收装置侧进行迭代检测时有助于提高数据接收质量的传输方法。 发送装置在每种移动振幅和相位的两种调制方式之间交替，根据选择的调制方案执行到星座点的映射，并且发送通过映射获得的调制信号。
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249.发明申请TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEIVING DEVICE AND RECEIVING METHOD 有权传输设备，传输方法，接收设备和接收方法公开(公告)号：US20160006491A1
公开(公告)日：2016-01-07
申请号：US14858004
申请日：2015-09-18
Inventor： Mikihiro OUCHI , Yutaka MURAKAMI , Tomohiro KIMURA
CPC classification number: H04B7/10 , H01Q21/24 , H04B1/06 , H04B7/0413 , H04B7/0469 , H04B7/0665 , H04B7/0689 , H04B10/532 , H04W52/0209 , Y02D70/00 , Y02D70/142 , Y02D70/144 , Y02D70/162 , Y02D70/168 , Y02D70/442 , Y02D70/444
Abstract: Provided is control information related to polarizations of antennas for MISO communication. The control signal generator generates polarization information indicating whether antennas used for transmission by MISO have only a first polarization or have a second polarization as well as the first polarization. With this structure, the present invention allows for the use of combinations of SISO, MISO and MIMO, taking the polarization of antennas. Furthermore, the present invention enables the receiver to reduce the power consumption.
Abstract translation: 提供与MISO通信的天线的偏振相关的控制信息。 控制信号发生器产生指示由MISO发射的天线是否仅具有第一偏振或具有第二偏振以及第一偏振的极化信息。 利用这种结构，本发明允许使用SISO，MISO和MIMO的组合来获取天线的极化。 此外，本发明使得接收机能够降低功耗。
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公开(公告)号：US20150256198A1
公开(公告)日：2015-09-10
申请号：US14722767
申请日：2015-05-27
Inventor： Yutaka MURAKAMI
CPC classification number: H03M13/255 , H03M13/036 , H03M13/09 , H03M13/1111 , H03M13/1154 , H03M13/23 , H03M13/256 , H03M13/616 , H03M13/617 , 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.
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