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：US20090052427A1

公开(公告)日：2009-02-26

申请号：US12278694

申请日：2007-02-07

申请人： Kengo Oketani ,  Yoshikazu Kakura ,  Toshifumi Sato ,  Shousei Yoshida

发明人： Kengo Oketani ,  Yoshikazu Kakura ,  Toshifumi Sato ,  Shousei Yoshida

IPC分类号： H04B7/212

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L25/022 ,  H04L25/03159 ,  H04L27/2601 ,  H04L27/261 ,  H04W28/06 ,  H04W88/00

摘要： A memory 21 of a pilot processing circuit 2 holds in advance a pilot sequence converted into a frequency region signal obtained by subjecting a pilot signal symbol transmitted in one block to Ntx_p-point DFT. The pilot sequence held in the memory 21 is subjected to a series of processes including a roll-off filtering by a roll-off filter circuit 22, subcarrier mapping process by subcarrier mapping circuit 23, an Ndft_p-point IDFT operation by an IDFT circuit 24, and a cyclic prefix adding process by a cyclic prefix adding circuit 25.

摘要翻译： 导频处理电路2的存储器21预先保存转换成通过对在一个块中发送的导频信号符号进行Ntx_p点DFT而获得的频域信号的导频序列。 保存在存储器21中的导频序列经过一系列处理，包括滚降滤波器电路22的滚降滤波，副载波映射电路23的子载波映射处理，IDFT电路24的Ndft_p点IDFT操作 ，以及循环前缀添加电路25的循环前缀添加处理。

公开(公告)号：US08548008B2

公开(公告)日：2013-10-01

申请号：US12278694

申请日：2007-02-07

申请人： Kengo Oketani ,  Yoshikazu Kakura ,  Toshifumi Sato ,  Shousei Yoshida

发明人： Kengo Oketani ,  Yoshikazu Kakura ,  Toshifumi Sato ,  Shousei Yoshida

IPC分类号： H04L12/40

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L25/022 ,  H04L25/03159 ,  H04L27/2601 ,  H04L27/261 ,  H04W28/06 ,  H04W88/00

摘要： A memory 21 of a pilot processing circuit 2 holds in advance a pilot sequence converted into a frequency region signal obtained by subjecting a pilot signal symbol transmitted in one block to Ntx_p-point DFT. The pilot sequence held in the memory 21 is subjected to a series of processes including a roll-off filtering by a roll-off filter circuit 22, subcarrier mapping process by subcarrier mapping circuit 23, an Ndft_p-point IDFT operation by an IDFT circuit 24, and a cyclic prefix adding process by a cyclic prefix adding circuit 25.

摘要翻译： 导频处理电路2的存储器21预先保持转换成通过对在一个块中发送的导频信号符号进行Ntx_p点DFT而获得的频域信号的导频序列。 保存在存储器21中的导频序列经过一系列处理，包括滚降滤波器电路22的滚降滤波，副载波映射电路23的子载波映射处理，IDFT电路24的Ndft_p点IDFT操作 ，以及循环前缀添加电路25的循环前缀添加处理。

公开(公告)号：US07746807B2

公开(公告)日：2010-06-29

申请号：US12279152

申请日：2007-01-24

申请人： Yoshikazu Kakura ,  Shousei Yoshida ,  Kengo Oketani

发明人： Yoshikazu Kakura ,  Shousei Yoshida ,  Kengo Oketani

IPC分类号： H04J1/16 ,  H04H7/30

CPC分类号： H04W52/241 ,  H04B17/336 ,  H04L1/0001 ,  H04L5/06 ,  H04L25/03834

摘要： A receiver estimates a channel quality. A transmitter amplifies a signal by a gain proportional to a difference between a required signal-to-noise power ratio and channel quality information, which is an estimation result of the channel quality, and transmits the signal so that the receiver can obtain the signal-to-noise power ratio. In this case, the receiver or the transmitter determines a roll-off rate of an adaptive filter based on the channel quality information. The transmitter uses the adaptive filter of the determined roll-off rate to filter and transmit the signal.

摘要翻译： 接收机估计信道质量。 发射机通过与所需信噪比功率比和作为信道质量的估计结果的信道质量信息之间的差成比例的增益放大信号，并发送信号，使得接收机可以获得信号 - 噪声功率比。 在这种情况下，接收机或发射机基于信道质量信息确定自适应滤波器的滚降速率。 发射机使用所确定的滚降速率的自适应滤波器来过滤和发送信号。

公开(公告)号：US20090201950A1

公开(公告)日：2009-08-13

申请号：US12279152

申请日：2007-01-24

申请人： Yoshikazu Kakura ,  Shousei Yoshida ,  Kengo Oketani

发明人： Yoshikazu Kakura ,  Shousei Yoshida ,  Kengo Oketani

IPC分类号： H04J3/18

CPC分类号： H04W52/241 ,  H04B17/336 ,  H04L1/0001 ,  H04L5/06 ,  H04L25/03834

摘要： A receiver estimates a channel quality. A transmitter amplifies a signal by a gain proportional to a difference between a required signal-to-noise power ratio and channel quality information, which is an estimation result of the channel quality, and transmits the signal so that the receiver can obtain the signal-to-noise power ratio. In this case, the receiver or the transmitter determines a roll-off rate of an adaptive filter based on the channel quality information. The transmitter uses the adaptive filter of the determined roll-off rate to filter and transmit the signal.

摘要翻译： 接收机估计信道质量。 发射机通过与所需信噪比功率比和作为信道质量的估计结果的信道质量信息之间的差成比例的增益放大信号，并发送信号，使得接收机可以获得信号 - 噪声功率比。 在这种情况下，接收机或发射机基于信道质量信息确定自适应滤波器的滚降速率。 发射机使用所确定的滚降速率的自适应滤波器来过滤和发送信号。

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：US07936838B2

公开(公告)日：2011-05-03

申请号：US10589460

申请日：2005-02-14

申请人： Takumi Ito ,  Shousei Yoshida ,  Yoshikazu Kakura ,  Hiroyuki Seki ,  Hiroyuki Kawai ,  Kenichi Higuchi ,  Mamoru Sawahashi

发明人： Takumi Ito ,  Shousei Yoshida ,  Yoshikazu Kakura ,  Hiroyuki Seki ,  Hiroyuki Kawai ,  Kenichi Higuchi ,  Mamoru Sawahashi

IPC分类号： H04B7/02

CPC分类号： H04L1/06 ,  H04B7/0854

摘要： It is an object to provide a receiving apparatus which is capable of demodulating signals with a very simple arrangement. Receiving apparatus 1 has N reception antennas 11-1-11-N, and reception antennas 11-1-11-N receive signals. Channel coefficient estimator 12 estimates and outputs channel coefficients from the signals received by respective reception antennas 11-1-11-N. QR decomposer 13 is supplied with a channel matrix having the channel coefficients as its elements, performs QR decomposition on the channel matrix, and outputs a Q matrix and an R matrix. A QH processor 14 is supplied with the Q matrix and the received signals, multiplies the received signals by a complex conjugate transposed matrix of the Q matrix, and outputs converted signal z. A transmitted sequence estimator 15 is supplied with converted signal z and the R matrix and estimates transmitted sequences.

摘要翻译： 本发明的目的是提供一种能够以非常简单的布置解调信号的接收装置。 接收装置1具有N个接收天线11-1-11-N，接收天线11-1-11-N接收信号。 信道系数估计器12从由各个接收天线11-1-11-N接收的信号估计和输出信道系数。 QR分解器13被提供有以通道系数作为其元件的通道矩阵，在通道矩阵上执行QR分解，并且输出Q矩阵和R矩阵。 Q Q处理器14被提供有Q矩阵和接收的信号，将接收的信号乘以Q矩阵的复共轭转置矩阵，并输出转换的信号z。 向发送序列估计器15提供转换的信号z和R矩阵并估计发送的序列。

公开(公告)号：US07822132B2

公开(公告)日：2010-10-26

申请号：US11718510

申请日：2005-10-31

申请人： Hisashi Futaki ,  Yoshikazu Kakura ,  Shousei Yoshida ,  Takumi Ito

发明人： Hisashi Futaki ,  Yoshikazu Kakura ,  Shousei Yoshida ,  Takumi Ito

IPC分类号： H04K1/10

CPC分类号： H04L5/0094 ,  H04L5/0007 ,  H04L5/0046

摘要： N sub-carriers are grouped in units of predetermined quantities in order beginning with the one exhibiting the highest communication channel quality to generate an optimal group pattern on the reception side. Then, communication channel information is calculated for each of sub-carrier groups in the optimal group pattern or a quasi-optimal group pattern which is assumed to be closest to the optimal group pattern among a plurality of previously set group pattern candidates. Communication channel information is designated as modified communication channel information. Grouping information indicative of the optimal group pattern or quasi-optimal group pattern is combined with modified communication channel information to generate feedback information. On the transmission side, sub-carriers are grouped based on reproduced feedback information reproduced from the feedback information.

摘要翻译： N个子载波以预定量的单位被分组，从具有最高通信信道质量的一个开始，以在接收侧生成最佳组模式。 然后，针对多个先前设定的组模式候选中的最佳组模式中的每一个子载波组或被假设为最接近最佳组模式的准最优组模式计算通信信道信息。 通信信道信息被指定为修改的通信信道信息。 将表示最佳组模式或准最佳组模式的分组信息与修改的通信信道信息组合以产生反馈信息。 在发送侧，基于从反馈​​信息再现的再现的反馈信息对子载波进行分组。

公开(公告)号：US08594039B2

公开(公告)日：2013-11-26

申请号：US11841021

申请日：2007-08-20

申请人： Yoshikazu Kakura ,  Shousei Yoshida ,  Takamichi Inoue

发明人： Yoshikazu Kakura ,  Shousei Yoshida ,  Takamichi Inoue

IPC分类号： H04W4/00 ,  H04B7/216 ,  H04J3/00 ,  H04W72/00 ,  H04B7/00

CPC分类号： H04W72/042 ,  H04L1/20 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/2602 ,  H04L27/2613

摘要： A reference signal of a user equipment to which a resource (LB#1) is allocated for a L1/L2 control signal, is allocated a resource (SB#1) that is closer on the time axis to the resource (LB#1), which the L1/L2 control signal is allocated, within the same frequency band as the L1/L2 control signal. A reference signal for CQI estimation, independent of a data signal and a L1/L2 control signal, is allocated a resource with which at least one of a reference signal for demodulation of a data signal and a reference signal for demodulation of a L1/L2 control signal is not transmitted at the same timing within the transmission band. The types of bandwidths of the reference signals multiplexed in a same short block within a same band are reduced, whereby restrictions as to the number of reference signal sequences that can be secured are diminished.

摘要翻译： 向L1 / L2控制信号分配资源（LB＃1）的用户设备的参考信号被分配在资源（LB＃1）的时间轴上更接近的资源（SB＃1） L1 / L2控制信号被分配在与L1 / L2控制信号相同的频带内。 分配与数据信号和L1 / L2控制信号无关的用于CQI估计的参考信号，用于解调数据信号的参考信号和解调L1 / L2的参考信号中的至少一个 在发送频带内的相同定时不发送控制信号。 减少在相同频带内的相同短块中多路复用的参考信号的带宽类型，从而减少了可以确保的参考信号序列的数量的限制。