公开(公告)号：US20070070879A1

公开(公告)日：2007-03-29

申请号：US11524941

申请日：2006-09-22

申请人： Shousei Yoshida ,  Masayuki Kimata ,  Yoshikazu Kakura ,  Kengo Oketani

发明人： Shousei Yoshida ,  Masayuki Kimata ,  Yoshikazu Kakura ,  Kengo Oketani

IPC分类号： H04J11/00

CPC分类号： H04L5/023 ,  H04L27/2662 ,  H04L2025/03414

摘要： A multi-user receiving apparatus is provided for achieving a reduction in the amount of processing for single-carrier FDMA signals and an improvement in reception characteristics. A DFT unit converts single-carrier FDMA received signals of all users to signals in a frequency domain commonly. A demapping unit selects part of sub-carriers for each user from sub-carriers supplied from the DFT unit. A reception filter separates a user signal and suppresses noise. A demodulator demodulates the user signal, and detects a timing thereof.

摘要翻译： 提供了一种多用户接收装置，用于实现单载波FDMA信号的处理量的减少和接收特性的提高。 DFT单元将所有用户的单载波FDMA接收信号通常转换为频域中的信号。 解映射单元从DFT单元提供的副载波中为每个用户选择子载波的一部分。 接收滤波器分离用户信号并抑制噪声。 解调器解调用户信号，并检测其定时。

公开(公告)号：US07668076B2

公开(公告)日：2010-02-23

申请号：US11524941

申请日：2006-09-22

申请人： Shousei Yoshida ,  Masayuki Kimata ,  Yoshikazu Kakura ,  Kengo Oketani

发明人： Shousei Yoshida ,  Masayuki Kimata ,  Yoshikazu Kakura ,  Kengo Oketani

IPC分类号： H04J11/00

CPC分类号： H04L5/023 ,  H04L27/2662 ,  H04L2025/03414

摘要： A multi-user receiving apparatus is provided for achieving a reduction in the amount of processing for single-carrier FDMA signals and an improvement in reception characteristics. A DFT unit converts single-carrier FDMA received signals of all users to signals in a frequency domain commonly. A demapping unit selects part of sub-carriers for each user from sub-carriers supplied from the DFT unit. A reception filter separates a user signal and suppresses noise. A demodulator demodulates the user signal, and detects a timing thereof.

摘要翻译： 提供了一种多用户接收装置，用于实现单载波FDMA信号的处理量的减少和接收特性的提高。 DFT单元将所有用户的单载波FDMA接收信号通常转换为频域中的信号。 解映射单元从DFT单元提供的副载波中为每个用户选择子载波的一部分。 接收滤波器分离用户信号并抑制噪声。 解调器解调用户信号，并检测其定时。

公开(公告)号：US07257408B2

公开(公告)日：2007-08-14

申请号：US10562830

申请日：2004-06-28

申请人： Shingo Kikuchi ,  Shousei Yoshida ,  Yoshikazu Kakura ,  Akihisa Ushirokawa ,  Masayuki Kimata

发明人： Shingo Kikuchi ,  Shousei Yoshida ,  Yoshikazu Kakura ,  Akihisa Ushirokawa ,  Masayuki Kimata

IPC分类号： H04Q7/20

CPC分类号： H04W88/06 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0026 ,  H04W52/42

摘要： A radio communication system for quickly selecting an optimum transmission mode in accordance with the quality and situation of a propagation path is provided. The system comprises first and second radio communication apparatuses capable of radio-communicating with each other. The first radio communication apparatus comprises a propagation path environment estimator for outputting the estimation result as propagation path environment information, a propagation path quality estimator for outputting the estimation result as propagation path quality, and a transmitter for transmitting both the informations to the second radio communication apparatus. The second radio communication apparatus comprises a transmission mode selector for selecting one of the transmission modes used for communicating with the first radio communication.

摘要翻译： 提供了一种用于根据传播路径的质量和状况快速选择最佳传输模式的无线电通信系统。 该系统包括能够彼此进行无线电通信的第一和第二无线电通信装置。 第一无线电通信装置包括用于将估计结果作为传播路径环境信息输出的传播路径环境估计器，用于将估计结果作为传播路径质量输出的传播路径质量估计器，以及用于将两个信息发送到第二无线电通信的发射机 仪器。 第二无线电通信装置包括用于选择用于与第一无线电通信进行通信的传输模式之一的传输模式选择器。

公开(公告)号：US08351553B2

公开(公告)日：2013-01-08

申请号：US12297125

申请日：2007-02-02

申请人： Shousei Yoshida ,  Masayuki Kimata

发明人： Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H04L1/02 ,  H04B7/04

CPC分类号： H04B7/0845 ,  H04B1/7107 ,  H04J15/00 ,  H04L5/023 ,  H04L2025/03414 ,  H04L2025/03426

摘要： In a MIMO receiving apparatus, the signals of single carriers transmitted from a plurality of transmission antennas are received by a plurality of reception antennas (1-1 through 1-N) and then separated according to frequency ranges. In this MIMO receiving apparatus, interference replicas of the antennas are eliminated from the received signals (by subtractor 54) before equalizing the two-dimensional frequency ranges, and non-distortion signal replicas are added (by a demodulating part 55) to the signals from which the interference replicas of the antennas have been eliminated after equalizing the two-dimensional frequency ranges.

摘要翻译： 在MIMO接收装置中，从多个发送天线发送的单载波的信号由多个接收天线（1-1〜1-N）接收，然后根据频率范围分离。 在该MIMO接收装置中，在均衡二维频率范围之前，从接收到的信号（由减法器54）中消除了天线的干扰副本，并且将非失真信号副本（由解调部分55）添加到来自 在平衡二维频率范围之后，已经消除了天线的干扰复制。

公开(公告)号：US20060199557A1

公开(公告)日：2006-09-07

申请号：US11365669

申请日：2006-03-02

申请人： Masayuki Kimata ,  Shousei Yoshida

发明人： Masayuki Kimata ,  Shousei Yoshida

IPC分类号： H04B1/10

CPC分类号： H04B7/0684 ,  H04B1/7097 ,  H04B7/04 ,  H04W52/16 ,  H04W52/42

摘要： A MIMO receiver, a MIMO reception method and a wireless communication system capable of accurate MMSE control even when each transmit antenna uses a different chip power ratio in MIMO filter reception. A correction coefficient calculator receives as input the chip power ratio of each transmit antenna, and estimates such pilot power that renders the chip power ratio of each transmit antenna equal to that of a reference transmit antenna. Thereby, the correction coefficient calculator calculates a correction coefficient βm to correct the actual pilot power of each transmit antenna. A weight calculator receives as input transmission channel impulse responses transferred into frequency domain by FFT sections, chip noise power estimated by a chip noise estimation section, and the correction coefficient βm obtained by the correction coefficient calculator. The weight calculator calculates filter weights according to the minimum mean square error (MMSE) criterion.

摘要翻译： 即使在MIMO滤波器接收中每个发射天线使用不同的码片功率比时，MIMO接收机，MIMO接收方式也能够进行精确的MMSE控制的无线通信系统。 校正系数计算器接收每个发射天线的芯片功率比作为输入，并且估计使每个发射天线的芯片功率比等于参考发射天线的芯片功率比的导频功率。 因此，校正系数计算器计算校正系数βm以校正每个发射天线的实际导频功率。 权重计算器接收通过FFT部分输入到频域的输入传输信道脉冲响应，由芯片噪声估计部分估计的芯片噪声功率和由校正系数计算器获得的校正系数βm。 权重计算器根据最小均方误差（MMSE）标准计算滤波器权重。

公开(公告)号：US07991360B2

公开(公告)日：2011-08-02

申请号：US10591663

申请日：2005-03-04

申请人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi ,  Shousei Yoshida ,  Masayuki Kimata

发明人： Junichiro Kawamoto ,  Noriyuki Maeda ,  Kenichi Higuchi ,  Mamoru Sawahashi ,  Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H04B1/10

CPC分类号： H04B7/0854 ,  H04B1/7105 ,  H04B1/7107 ,  H04L1/0656 ,  H04L25/0228 ,  H04L2025/03426

摘要： A receiving apparatus, a receiving method, and a radio communications system are disclosed. The receiving apparatus is for receiving CDMA signals transmitted by M antennas and received by N antennas, where M and N are positive integers. The receiving apparatus includes a multipath receiving signal demodulating unit for primary demodulation of the CDMA signals received by the receiving antennas to obtain estimated transmission signals, and for obtaining signals in a multipath environment of each path of the receiving antennas based on the estimated results. Further, the receiving apparatus includes a multipath interference canceling unit for deducting signals of the paths other than a target path from the signals received by the receiving antennas to obtain multipath interference cancelled signals. Further, the receiving apparatus includes a demodulator for secondary demodulation of the multipath interference cancelled signals.

摘要翻译： 公开了接收装置，接收方法和无线电通信系统。 接收装置用于接收由M个天线发送并由N个天线接收的CDMA信号，其中M和N是正整数。 接收装置包括：多径接收信号解调单元，用于对由接收天线接收的CDMA信号进行一次解调以获得估计的传输信号，并且用于基于估计的结果获得接收天线的每个路径的多路径环境中的信号。 此外，接收装置包括：多径干扰消除单元，用于从由接收天线接收的信号中扣除目标路径以外的路径的信号，以获得多路径干扰消除信号。 此外，接收装置包括用于二次解调多径干扰消除信号的解调器。

公开(公告)号：US07949040B2

公开(公告)日：2011-05-24

申请号：US12153001

申请日：2008-05-12

申请人： Shousei Yoshida ,  Masayuki Kimata

发明人： Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H04B3/46 ,  H04B17/00 ,  H04Q1/20

CPC分类号： H04B17/336

摘要： A reception quality measuring apparatus of the present invention comprises a first sub-carrier averaging unit for averaging and outputting a channel gain after equalization estimated on the basis of the pilot signal over a sub-carrier, a first power calculation unit for calculating the power of a signal output from the first sub-carrier averaging unit and outputting the same as signal power, a pilot replica generator for generating and outputting a pilot signal replica with respect to a zero-timing signal component based on the zero-timing signal component when a signal x(n) in the time domain after equalization corresponding to the equalized signal is n=0, and also based on a previously set pilot code characteristic, a subtractor for subtracting the pilot signal replica output from the pilot replica generator from the equalized signal and outputting the result as an interference signal, a second power calculation unit for calculating and outputting the power of the interference signal output from the subtractor, a second sub-carrier averaging unit for averaging the power output from the second power calculation unit over the sub-carrier and outputting the result as interference power, and a divider for dividing the signal power output from the first power calculation unit by the interference power output from the second sub-carrier averaging unit to calculate a reception quality after equalization.

摘要翻译： 本发明的接收质量测量装置包括：第一子载波平均单元，用于根据子载波上的导频信号来估计均衡后的均衡和输出信道增益;第一功率计算单元，用于计算第 从第一副载波平均化单元输出的信号并将其作为信号功率输出的导频副本发生器，用于当基于零定时信号分量生成并输出关于零定时信号分量的导频信号副本时， 对于均衡信号的均衡后的时域中的信号x（n）为n = 0，并且还基于预先设定的导频代码特性，减法器，用于从均衡信号中减去从导频副本发生器输出的导频信号副本 并输出作为干扰信号的结果;第二功率计算单元，用于计算并输出干扰信号的功率 从所述减法器输出的第二子载波平均化单元，用于对从所述副载波上的所述第二功率计算单元输出的功率进行平均，并输出所述结果作为干扰功率;以及除法器，用于对从所述第一功率计算 通过从第二副载波平均化单元输出的干扰功率单位来计算均衡后的接收质量。

公开(公告)号：US20100208718A1

公开(公告)日：2010-08-19

申请号：US12445886

申请日：2007-10-16

申请人： Shousei Yoshida ,  Masayuki Kimata

发明人： Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H04W40/00

CPC分类号： H04L27/2657 ,  H04L27/265

摘要： To provide a reception method and a reception device in which a base station can correct a frequency offset contained in a reception signal and realize an excellent reception characteristic by using simple reception mechanism of a frequency region in a radio system of the frequency division multiplex type. [Means for Solving Problems] A base station includes: a DFT unit which converts reception signals from a plurality of mobile stations communicating by radio communication of the frequency division multiplex method all at once into signals of a frequency region; a demapping unit which recognizes user signals corresponding to respective mobile stations by using subcarriers associated with respective mobile stations from the signals of the converted frequency region; a corrected signal generation unit which creates a correction signal for correcting a user signal frequency offset for each of the user signals; a frequency conversion unit which corrects the frequency offset of the user signal by the correction signal; and a demodulation unit which demodulates each of the corrected user signals.

摘要翻译： 为了提供接收方法和接收装置，其中基站可以通过使用频分多路复用类型的无线电系统中的频率区域的简单接收机制来校正包含在接收信号中的频率偏移并实现优异的接收特性。 解决问题的手段基站包括：DFT单元，其将来自多个移动站的接收信号通过频分多路复用方法的无线电通信一次全部转换为频率区域的信号; 解映射单元，其通过使用与转换的频率区域的信号相关联的与各个移动站相关联的子载波来识别与各个移动站相对应的用户信号; 校正信号生成单元，其创建用于校正每个用户信号的用户信号频率偏移的校正信号; 频率转换单元，其通过所述校正信号校正所述用户信号的频率偏移; 以及解调单元，其对每个经校正的用户信号进行解调。

公开(公告)号：US20090262853A1

公开(公告)日：2009-10-22

申请号：US12297125

申请日：2007-02-02

申请人： Shousei Yoshida ,  Masayuki Kimata

发明人： Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H04L1/02 ,  H04B1/10 ,  H04J11/00

CPC分类号： H04B7/0845 ,  H04B1/7107 ,  H04J15/00 ,  H04L5/023 ,  H04L2025/03414 ,  H04L2025/03426

摘要： In a MIMO receiving apparatus, signals of single carriers transmitted from a plurality of transmission antennas are received by a plurality of reception antennas (1-1 through 1-N) and then separated according to frequency domain. In this MIMO receiving apparatus, interference replicas of the antennas are eliminated from received signals (by subtractor 54) before equalizing the two-dimensional frequency domain, and distortion free signal replicas are added (by demodulating part 55) to the signals from which the interference replicas of the antennas have been eliminated after equalizing the two-dimensional frequency domain.

摘要翻译： 在MIMO接收装置中，由多个发送天线发送的单载波的信号由多个接收天线（1-1〜1-N）接收，然后根据频域分离。 在该MIMO接收装置中，在均衡二维频域之前，从接收信号（由减法器54）中消除天线的干扰复制，并且将无失真信号副本（通过解调部分55）添加到干扰 在对二维频域进行均衡后，已经消除了天线的副本。

公开(公告)号：US07577194B2

公开(公告)日：2009-08-18

申请号：US11480164

申请日：2006-06-30

申请人： Masayuki Kimata ,  Shousei Yoshida

发明人： Masayuki Kimata ,  Shousei Yoshida

IPC分类号： H03H7/30 ,  H04B1/10

CPC分类号： H04L25/0212 ,  H04L25/0228 ,  H04L25/03159 ,  H04L2025/03522

摘要： An equalizer calculates an equalization weight using a transmission channel response vector that arranges transmission channel estimation at the detection path timing and at the neighbor path timings thereof. The equalizer realizes excellent equalization characteristics by generating a transmission channel response vector that will not be affected by MPI by use of a multipath interference canceller (MPIC) to calculate the equalization weight.

摘要翻译： 均衡器使用在检测路径定时和相邻路径定时处布置传输信道估计的传输信道响应向量来计算均衡权重。 均衡器通过使用多路径干扰消除器（MPIC）生成不受MPI影响的传输信道响应向量来实现优异的均衡特性来计算均衡权重。