公开(公告)号：US08265675B2

公开(公告)日：2012-09-11

申请号：US12098917

申请日：2008-04-07

申请人： Mariko Matsumoto ,  Shousei Yoshida

发明人： Mariko Matsumoto ,  Shousei Yoshida

IPC分类号： H04B7/00

CPC分类号： H04B7/0413 ,  H04W36/18 ,  H04W36/30

摘要： A MIMO wireless communication system capable of relaxing a reduction in a transmission rate on a cell end far from a base station and ensuring a high transmission rate for a mobile station, irrespectively of a distance from the base station is provided.In a state 1, the mobile station 21 checks a propagation line quality and instructs only the first base station 11 to transmit data to the mobile station 21. In a state 2, the mobile station 21 issues a request to divide the data to the first base station 11 and the second base station 12 and to transmit the divided data to the mobile station 21, and holds MIMO communication with the two base stations.In a state 3, the mobile station 21 requests only the second base station 12 to transmit the data and communicates with the second base station 12.

摘要翻译： 提供了一种MIMO无线通信系统，其能够在远离基站的小区端部放宽传输速率的降低，并且确保移动站的高传输速率，而与基站的距离无关。 在状态1中，移动台21检查传播线路质量，仅指示第一基站11向移动台21发送数据。在状态2中，移动台21发出将数据划分到第一 基站11和第二基站12，并将划分的数据发送到移动台21，并与两个基站保持MIMO通信。 在状态3中，移动台21仅请求第二基站12发送数据并与第二基站12进行通信。

公开(公告)号：US07961800B2

公开(公告)日：2011-06-14

申请号：US12066128

申请日：2006-06-30

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L1/0003 ,  H04L1/0026 ,  H04L27/2627

摘要： Adaptive modulation part (1) modulates a signal in a modulation scheme selected based on a modulation mode, switch (2) selects a radio scheme congenial to the modulation scheme in which the signal is modulated. When the selected radio scheme is single-carrier scheme, single-carrier generation part (3) generates a single-carrier signal. When the selected radio scheme is a multicarrier scheme, multicarrier generation part (4) generates a multicarrier signal, the generated single-carrier signal or multicarrier signal is converted into a carrier band signal by quadrature modulation part (5), and the converted signal is amplified by transmission amplifier (6).

摘要翻译： 自适应调制部分（1）调制基于调制模式选择的调制方案中的信号，开关（2）选择与其中调制信号的调制方案相适应的无线电方案。 当选择的无线电方案是单载波方案时，单载波生成部分（3）产生单载波信号。 当所选择的无线电方案是多载波方案时，多载波发生部分（4）产生多载波信号，所产生的单载波信号或多载波信号由正交调制部分（5）转换成载波信号，转换后的信号为 由发射放大器（6）放大。

公开(公告)号：US07826514B2

公开(公告)日：2010-11-02

申请号：US10526225

申请日：2004-04-26

申请人： Yoshikazu Kakura ,  Shousei Yoshida ,  Hiroyuki Atarashi ,  Noriyuki Maeda

发明人： Yoshikazu Kakura ,  Shousei Yoshida ,  Hiroyuki Atarashi ,  Noriyuki Maeda

IPC分类号： H04B1/00

CPC分类号： H04L5/026 ,  H04J11/0036 ,  H04J13/004 ,  H04L27/2613

摘要： A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and in the receiver, a spreading code that is not used in spreading said pilot signal is used as a despreading code to despread a received signal and then estimate noise and interference power. The spreading code that is used to spread the pilot symbol and the despreading code that is used in despreading are assigned so as to be orthogonal even if only in N chips on the time axis.

摘要翻译： 一种无线电发射机 - 接收机，其中在发射机中使用导频符号，该发射机在频率轴上经过M码片扩​​频，并在时间轴上以N×M码片长度的扩频码（其中M和N为 任何整数等于或大于2），并且在接收机中，将不用于扩展所述导频信号的扩展码用作解扩码以对接收信号进行解扩，然后估计噪声和干扰功率。 用于扩展导频符号的扩展码和解扩使用的解扩码被分配为正交，即使只在时间轴上的N个码片。

公开(公告)号：US07773687B2

公开(公告)日：2010-08-10

申请号：US10588386

申请日：2005-02-02

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04B15/00

CPC分类号： H04L1/0021 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0026

摘要： A wireless apparatus 1 receives reception quality information, propagation environment information, and block error rate detection information from a wireless apparatus of the other end of communication together with a data signal, and the target error rate selecting unit 7 selects any one of a plurality of tables in which target block error rates of respective ones of a plurality of transmission modes are registered in accordance with propagation environment information. The threshold value control unit 8 controls the threshold value of the reception quality to select the transmission mode by the control amount on the basis of the target block error rate in accordance with error rate detection information. The transmission mode selecting unit 9 compares reception quality information with the threshold value, selects any one of the transmission modes, and makes the selected one into the transmission mode to the wireless apparatus of the other end of communication.

摘要翻译： 无线装置1从数据信号的另一端的无线装置接收接收质量信息，传播环境信息和块错误率检测信息，目标错误率选择部7选择多个 根据传播环境信息登记多个传输模式中的各个传输模式的目标块错误率的表。 阈值控制单元8根据错误率检测信息，根据目标块错误率，控制接收质量的阈值，以选择发送模式的控制量。 传输模式选择单元9将接收质量信息与阈值进行比较，选择传输模式中的任何一种，并将所选择的一个传送到传输模式，使其连接到另一端的无线设备。

公开(公告)号：US20100046661A1

公开(公告)日：2010-02-25

申请号：US12524065

申请日：2008-01-09

申请人： Shousei Yoshida ,  Masayuki Kimata

发明人： Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H04B15/00 ,  H03D1/04

CPC分类号： H04B7/0854 ,  H04B1/71052 ,  H04B1/712 ,  H04L25/0228 ,  H04L25/03159 ,  H04L27/2647 ,  H04L2025/03414

摘要： A receiving apparatus is provided in which a single carrier signal is received by a plurality of receiving antennas, and multipath equalization and other cell interference suppression are carried out in a frequency domain at a same time. A plurality of antennas 1-1 to 1-N receives the single carrier signal. The DFT sections 3-1 to 3-N converts the reception signals into frequency domain signals. A channel estimating section 5 estimates a channel gain of a desired user signal by using pilot reception signals. An interference correlation matrix estimating section 6 estimates an interference correlation matrix from the pilot reception signals and a channel estimation value. A weight, calculating section. A weight calculating section 7 receives the channel estimates and the interference correlation matrix and calculates equalization weights. An equalising section 8 performs multipath equalization and other cell interference suppression to the desired user signal in a frequency domain. An IDFT section 9 converts an equalization signal into a signal in a time domain.

摘要翻译： 提供一种接收装置，其中单个载波信号被多个接收天线接收，并且同时在频域中执行多径均衡和其他小区干扰抑制。 多个天线1-1至1-N接收单载波信号。 DFT部3-1〜3-N将接收信号变换为频域信号。 信道估计部分5通过使用导频接收信号来估计所需用户信号的信道增益。 干扰相关矩阵估计部分6从导频接收信号和信道估计值估计干扰相关矩阵。 一个体重，计算部分。 权重计算部分7接收信道估计和干扰相关矩阵并计算均衡权重。 均衡部分8对频域中的期望用户信号执行多径均衡和其他小区干扰抑制。 IDFT部分9将均衡信号转换成时域中的信号。

公开(公告)号：US20090232194A1

公开(公告)日：2009-09-17

申请号：US12066128

申请日：2006-06-30

申请人： Shousei Yoshida

发明人： Shousei Yoshida

IPC分类号： H04L27/36 ,  H04B17/00

CPC分类号： H04L1/0003 ,  H04L1/0026 ,  H04L27/2627

摘要： Adaptive modulation part (1) modulates a signal in a modulation scheme selected based on a modulation mode, switch (2) selects a radio scheme congenial to the modulation scheme in which the signal is modulated. When the selected radio scheme is single-carrier scheme, single-carrier generation part (3) generates a single-carrier signal. When the selected radio scheme is a multicarrier scheme, multicarrier generation part (4) generates a multicarrier signal, the generated single-carrier signal or multicarrier signal is converted into a carrier band signal by quadrature modulation part (5), and the converted signal is amplified by transmission amplifier (6).

摘要翻译： 自适应调制部分（1）调制基于调制模式选择的调制方案中的信号，开关（2）选择与其中调制信号的调制方案相适应的无线电方案。 当选择的无线电方案是单载波方案时，单载波生成部分（3）产生单载波信号。 当所选择的无线电方案是多载波方案时，多载波发生部分（4）产生多载波信号，所产生的单载波信号或多载波信号由正交调制部分（5）转换成载波信号，转换后的信号为 由发射放大器（6）放大。

公开(公告)号：US07565114B2

公开(公告)日：2009-07-21

申请号：US10564552

申请日：2004-07-16

申请人： Takumi Ito ,  Shousei Yoshida

发明人： Takumi Ito ,  Shousei Yoshida

IPC分类号： H04B1/00 ,  H04B7/00

CPC分类号： H04B7/0619 ,  H04L1/0001

摘要： An SINR estimating unit of a receiver apparatus measures first and second demodulated signals to calculate SINR (ratio of signal power to sum of interference power and noise power) for each signal sequence. A transmission parameter deciding unit decides, based on the SINR, a transmission parameter used by a transmitter apparatus for controlling the transmission for each signal sequence, and then feeds the decided transmission parameter back to the transmitter apparatus. First and second mapping units of the transmitter apparatus controls, based on the transmission parameters as fed back, the modulation level for each signal sequence.

摘要翻译： 接收机装置的SINR估计单元测量第一和第二解调信号，以计算每个信号序列的SINR（信号功率与干扰功率与噪声功率之和的比值）。 传输参数决定单元基于SINR确定由发送装置使用的用于控制每个信号序列的发送的发送参数，然后将所确定的发送参数反馈给发送装置。 发射机装置的第一和第二映射单元基于反馈的传输参数来控制每个信号序列的调制级别。

公开(公告)号：US20090154419A1

公开(公告)日：2009-06-18

申请号：US12332480

申请日：2008-12-11

申请人： SHOUSEI YOSHIDA ,  Masayuki KIMATA

发明人： SHOUSEI YOSHIDA ,  Masayuki KIMATA

IPC分类号： H04W72/00

CPC分类号： H04L5/0023 ,  H04L5/0037 ,  H04L5/006 ,  H04L5/0089 ,  H04L25/022

摘要： A priority computation process computes a priority of each user for each RB (Resource Brock) using a reception SINR. A maximum priority user selection/RB allocation process selects a user with the maximum priority for an unallocated RB and allocates the RB to the user. A frequency axis/space axis unallocated RB presence determination process proceeds to scheduling for a next user if there is an unallocated RB on the frequency or space axis. A projected channel vector update process updates a projected channel vector of an unselected user by GS orthogonalization. An orthogonal coefficient computation process computes an orthogonal coefficient. A corrected SINR computation process computes a corrected SINR. A next MIMO layer priority computation process computes priorities of unselected users for a corresponding RB in the next multiple MIMO layer. The priorities of the unselected users are used in the next user scheduling processing.

摘要翻译： 优先级计算处理使用接收SINR为每个RB（资源Brock）计算每个用户的优先级。 最大优先级用户选择/ RB分配过程选择未分配RB的最大优先级的用户，并将RB分配给用户。 如果在频率或空间轴上存在未分配的RB，则频率轴/空间轴未分配的RB存在确定处理进行到下一个用户的调度。 投影通道矢量更新处理通过GS正交化更新未选择用户的投影通道向量。 正交系数计算处理计算正交系数。 经校正的SINR计算处理计算校正SINR。 下一个MIMO层优先级计算处理计算下一个多MIMO层中相应RB的未选择用户的优先级。 未选择的用户的优先级用于下一个用户调度处理。

公开(公告)号：US20090022253A1

公开(公告)日：2009-01-22

申请号：US12162126

申请日：2007-01-23

申请人： Shousei Yoshida ,  Masayuki Kimata

发明人： Shousei Yoshida ,  Masayuki Kimata

IPC分类号： H03D1/04

CPC分类号： H04B1/76 ,  H04B2201/70701 ,  H04L25/022 ,  H04L25/0228 ,  H04L25/03159 ,  H04L27/2623 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03522

摘要： Provided are a channel estimation device and an equalization device capable of achieving high channel estimation accuracy with less amount of calculation processing. The equalization device includes: a channel estimation section including a ZF calculation/clipping processing section and correlation processing section; a weight calculation section; and an equalization filter. The ZF calculation/clipping processing section uses a signal obtained by converting a pilot code into a frequency domain to calculate a pilot reference signal according to a Zero Forcing (ZF) method and clips the gain of the calculated pilot reference signal to a predetermined value to generate a clipped pilot reference signal. The correlation processing section performs correlation between a pilot reception signal in the frequency domain and clipped pilot reference signal to estimate channel characteristics of the frequency domain. The weight calculation section calculates an equalization weight based on the channel characteristics of the frequency domain. The equalization filter performs equalization processing of a frequency domain reception signal using the equalization weight.

摘要翻译： 提供了能够以更少的计算处理量实现高信道估计精度的信道估计装置和均衡装置。 均衡装置包括：信道估计部分，包括ZF计算/限幅处理部分和相关处理部分; 权重计算部分; 和均衡滤波器。 ZF计算/削波处理部使用通过将导频码转换成频域而获得的信号，根据零强制（ZF）方法计算导频参考信号，并将计算出的导频基准信号的增益剪切为规定值， 产生限幅导频参考信号。 相关处理部分执行频域中的导频接收信号和限幅导频参考信号之间的相关，以估计频域的信道特性。 权重计算部分基于频域的信道特性来计算均衡权重。 均衡滤波器使用均衡权重来执行频域接收信号的均衡处理。

公开(公告)号：US07363057B2

公开(公告)日：2008-04-22

申请号：US10510453

申请日：2003-04-03

申请人： Naoto Ishii ,  Shousei Yoshida ,  Kojiro Hamabe

发明人： Naoto Ishii ,  Shousei Yoshida ,  Kojiro Hamabe

IPC分类号： H04M1/00 ,  H04B1/38 ,  H04B15/00 ,  H04B17/00 ,  H04H1/00

CPC分类号： H04W36/06 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/20 ,  H04W36/30

摘要： A mobile communication system capable of improving the system throughput. A base station (1) divides one cell into three sectors. A common pilot channel is transmitted to a plurality of mobile stations in the sectors by beams (101-103) whose directivity is controlled by an adaptive antenna for each of the sectors. On the other hand, when a mobile station (2) communicates data with the base station (1), the base station transmits a data channel and an individual control channel to the mobile station (2) by using a beam (201) whose directivity is controlled individually. The mobile station (2) switches between the common pilot channel and the individual control channel from the base station (1) for estimating the communication path quality.

摘要翻译： 一种能够提高系统吞吐量的移动通信系统。 基站（1）将一个小区划分为三个扇区。 公共导频信道通过波束（101-103）向扇区中的多个移动台发送，其方向性由每个扇区的自适应天线控制。 另一方面，当移动台（2）与基站（1）通信数据时，基站通过使用其指向性的波束（201）向移动台（2）发送数据信道和单独的控制信道 被单独控制。 移动站（2）在公共导频信道和来自基站（1）的单独控制信道之间切换以估计通信路径质量。