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1. 发明授权

US07864897B2 MIMO multiplexing communication system and a signal separation method 失效
标题翻译： MIMO复用通信系统和信号分离方法
公开(公告)号：US07864897B2
公开(公告)日：2011-01-04
申请号：US11909607
申请日：2006-03-20
申请人： Noriyuki Maeda , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
发明人： Noriyuki Maeda , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
IPC分类号： H04L27/06 , H04L23/02
CPC分类号： H04B7/0413 , H04L25/0204 , H04L25/0228 , H04L25/0246 , H04L25/03191 , H04L25/03242 , H04L2025/03426
摘要： A disclosed receiver in a MIMO multiplexing communication system, in which plural signals are simultaneously transmitted from plural transmitting antenna branches using the same frequency, and the transmitted signals are retrieved by receiving signals at plural receiving antennas, separating the received signals and searching for proper symbol metrics for each branch, comprises a QR decomposer for QR decomposing the received signals to orthogonalize the transmitted signals; a symbol replica candidate ranking unit for subtracting surviving symbol replica candidates from the QR decomposed received signals to get remaining received signals and rank the remaining signals in the increasing order of expected branch metrics of the remaining received signals; a symbol replica candidate selector for selecting symbol replica candidates in the ranked order; a branch metric calculator for calculating the branch metrics of the selected symbol replica candidates; and a threshold comparator for comparing the calculated branch metrics with a predetermined threshold; wherein if a calculated branch metric is larger than the predetermined threshold, the branch metric and successive branch metrics are deleted without further searching.
摘要翻译：在MIMO复用通信系统中公开的接收机，其中使用相同频率从多个发送天线分支同时发送多个信号，并且通过在多个接收天线处接收信号来检索所发送的信号，分离接收的信号并搜索适当的符号每个分支的度量包括QR分解器，用于QR分解接收的信号以使发送的信号正交化; 符号复制候选排序单元，用于从所述QR分解的接收信号中减去剩余码元复制候选，以获得剩余的接收信号，并以剩余接收信号的预期分支度量的递增顺序对剩余信号进行排序; 用于以排序顺序选择符号复本候选者的符号复制候选选择器; 分支度量计算器，用于计算所选择的符号复本候选的分支度量; 以及阈值比较器，用于将所计算的分支度量与预定阈值进行比较; 其中如果所计算的分支度量大于所述预定阈值，则所述分支度量和连续分支度量被删除而不进一步搜索。

2. 发明申请

US20100113059A1 RADIO ACCESS NETWORK APPARATUS AND THE METHOD 审中-公开
标题翻译：无线接入网络设备及方法
公开(公告)号：US20100113059A1
公开(公告)日：2010-05-06
申请号：US12293654
申请日：2007-03-19
申请人： Akihito Morimoto , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
发明人： Akihito Morimoto , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
IPC分类号： H04W72/12
CPC分类号： H04W16/02 , H04W16/30 , H04W52/241
摘要： A radio access network apparatus comprises a means for judging whether or not a mobile station belongs to the area of a cell end and a means for allocating the frequency of the cell end to the mobile station of the cell end and allocating the frequency of a non-cell end different from the frequency of the cell end to a user in an area other than the cell end. The frequency of the cell end includes a first band different for each cell. The frequency of the non-cell end includes a second band common to a plurality of cells including its own cell and a third band equal to the frequency of the adjacent cell end.
摘要翻译：无线接入网络装置包括：判定移动台是否属于小区端区域的单元，以及用于向小区端的移动台分配小区末端的频率的单元， -cell端不同于小区端以外的区域中的小区端到用户的频率。小区端的频率包括对于每个小区不同的第一频带。非小区端的频率包括对包括其自己的小区的多个小区和等于相邻小区端的频率的第三频带共同的第二频带。

3. 发明授权

US07583739B2 Channel estimation device, channel estimation method, and wireless receiver 有权
标题翻译：信道估计装置，信道估计方法和无线接收机
公开(公告)号：US07583739B2
公开(公告)日：2009-09-01
申请号：US11128191
申请日：2005-05-13
申请人： Kenichi Higuchi , Hiroyuki Kawai , Noriyuki Maeda , Mamoru Sawahashi
发明人： Kenichi Higuchi , Hiroyuki Kawai , Noriyuki Maeda , Mamoru Sawahashi
IPC分类号： H04K1/10
CPC分类号： H04L25/0234 , H04L25/0204
摘要： A channel estimation device is provided to achieve high-precision channel estimation in a MIMO or multicarrier wireless receiver. This channel estimation device is used in the wireless receiver that receives pilot signals through reception antennas. The pilot signals are modulated by a multicarrier method and are transmitted from transmission antennas. The pilot signals are orthogonal to one another. The channel estimation device includes: an estimation unit that determines a channel estimate value for each unit time slot and each unit sub carrier; and an averaging unit that averages the channel estimate values over time slots including a target time slot and sub carriers including a target sub carrier, thereby determining an average channel estimate value.
摘要翻译：提供信道估计装置以在MIMO或多载波无线接收机中实现高精度信道估计。该信道估计装置用于通过接收天线接收导频信号的无线接收机。导频信号由多载波方式调制，并从发射天线发射。导频信号彼此正交。信道估计装置包括：估计单元，其确定每个单位时隙的信道估计值和每个单位子载波; 以及平均单元，其对包括目标时隙的时隙和包括目标子载波的子载波的时隙进行平均，从而确定平均信道估计值。

4. 发明申请

US20070155433A1 Wireless communication system, receiving apparatus, modulating method for use therein, and program therefor 有权
标题翻译：无线通信系统，接收装置，其中使用的调制方法及其程序
公开(公告)号：US20070155433A1
公开(公告)日：2007-07-05
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： H04B7/00 , H04B1/06
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，接收天线11-1-11接收信号。信道系数估计器12从由各个接收天线11-1-11接收的信号中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矩阵和接收信号，将接收信号乘以Q矩阵的复共轭转置矩阵，并输出转换后的信号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。

5. 发明申请

US20050259771A1 Signal separation device and signal separation method 有权
标题翻译：信号分离装置和信号分离方法
公开(公告)号：US20050259771A1
公开(公告)日：2005-11-24
申请号：US11128193
申请日：2005-05-13
申请人： Kenichi Higuchi , Hiroyuki Kawai , Noriyuki Maeda , Mamoru Sawahashi
发明人： Kenichi Higuchi , Hiroyuki Kawai , Noriyuki Maeda , Mamoru Sawahashi
IPC分类号： H03M13/45 , H04B7/04 , H04L1/06 , H04L25/02 , H04L25/03 , H04L25/06 , H04L27/38 , H04B7/10
CPC分类号： H04L25/03331 , H04B7/04 , H04L25/0204 , H04L25/0228 , H04L25/0246 , H04L2025/0342
摘要： A signal separation device is disclosed that is able to reduce a number of calculations required when separating a received signal transmitted from transmission devices into the individual transmission signal. The signal separation device includes a signal point derivation unit that multiplies the received signal with respective elements of a unitary matrix, and derives at least one received-signal signal point on a signal constellation diagram; a definition unit that defines plural sections on the signal constellation diagram, each of the sections including a predetermined number of signal points; a detection unit that detects a received-signal section from the sections, the received-signal section including the received-signal signal point; a selection unit that selects signal points in the received-signal section as candidates of the received-signal signal point; and a determination unit that determines the transmission signals based on the selected signal points.
摘要翻译：公开了一种信号分离装置，其能够减少将从发送装置发送的接收信号分离成各个发送信号所需的计算次数。信号分离装置包括：信号点导出单元，用于将接收到的信号与单一矩阵的各个元素相乘，并在信号星座图上导出至少一个接收信号信号点; 定义单元，其在信号星座图上定义多个部分，每个部分包括预定数量的信号点; 检测单元，其从所述部分检测接收信号部分，所述接收信号部分包括所述接收信号信号点; 选择单元，其选择接收信号部分中的信号点作为接收信号信号点的候选; 以及确定单元，其基于所选择的信号点来确定发送信号。

6. 发明申请

US20110090893A1 MOBILE COMMUNICATION SYSTEM, RECEIVER AND METHOD 有权
标题翻译：移动通信系统，接收机和方法
公开(公告)号：US20110090893A1
公开(公告)日：2011-04-21
申请号：US12936270
申请日：2009-03-03
申请人： Kenichi Higuchi , Hiroyuki Kawai
发明人： Kenichi Higuchi , Hiroyuki Kawai
IPC分类号： H04L27/00 , H04B7/216
CPC分类号： H04B7/0413 , H04J11/0046 , H04L25/0246 , H04L27/2647 , H04L2025/03426
摘要： A transmitter in a mobile communication system code-multiplexes transmission symbols together with spreading codes, performs inverse Fourier transform and transmits the result from multiple transmit antennas. A receiver in the mobile communication system performs Fourier transform on signals received at multiple receive antennas, extracts signal components of individual subcarriers and estimates symbols in accordance with a QR decomposition algorithm. A unitary matrix is derived such that a product of a spreading matrix including spreading elements as its elements and a channel matrix representing radio channel states is equal to a product of the unitary matrix and a triangular matrix. A reception vector, a unitary matrix and a triangular matrix are used to estimate symbol candidates transmitted from individual transmit antennas.
摘要翻译：移动通信系统中的发射机将传输符号与扩展码一起进行码复用，执行逆傅里叶变换，并从多个发射天线发射结果。移动通信系统中的接收机对在多个接收天线处接收到的信号执行付里叶变换，根据QR分解算法提取各个子载波的信号分量和估计符号。导出单一矩阵，使得包括扩展元素作为其元素的扩展矩阵和表示无线电信道状态的信道矩阵的乘积等于酉矩阵和三角矩阵的乘积。接收矢量，酉矩阵和三角矩阵用于估计从各个发射天线发射的符号候选。

7. 发明申请

US20090213965A1 MIMO MULTIPLEXING COMMUNICATION SYSTEM AND A SIGNAL SEPARATION METHOD 失效
标题翻译： MIMO多路复用通信系统和信号分离方法
公开(公告)号：US20090213965A1
公开(公告)日：2009-08-27
申请号：US11909607
申请日：2006-03-20
申请人： Noriyuki Maeda , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
发明人： Noriyuki Maeda , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
IPC分类号： H04L27/06
CPC分类号： H04B7/0413 , H04L25/0204 , H04L25/0228 , H04L25/0246 , H04L25/03191 , H04L25/03242 , H04L2025/03426
摘要： A disclosed receiver in a MIMO multiplexing communication system, in which plural signals are simultaneously transmitted from plural transmitting antenna branches using the same frequency, and the transmitted signals are retrieved by receiving signals at plural receiving antennas, separating the received signals and searching for proper symbol metrics for each branch, comprises a QR decomposer for QR decomposing the received signals to orthogonalize the transmitted signals; a symbol replica candidate ranking unit for subtracting surviving symbol replica candidates from the QR decomposed received signals to get remaining received signals and rank the remaining signals in the increasing order of expected branch metrics of the remaining received signals; a symbol replica candidate selector for selecting symbol replica candidates in the ranked order; a branch metric calculator for calculating the branch metrics of the selected symbol replica candidates; and a threshold comparator for comparing the calculated branch metrics with a predetermined threshold; wherein if a calculated branch metric is larger than the predetermined threshold, the branch metric and successive branch metrics are deleted without further searching.
摘要翻译：在MIMO复用通信系统中公开的接收机，其中使用相同频率从多个发送天线分支同时发送多个信号，并且通过在多个接收天线处接收信号来检索所发送的信号，分离接收的信号并搜索适当的符号每个分支的度量包括QR分解器，用于QR分解接收的信号以使发送的信号正交化; 符号复制候选排序单元，用于从所述QR分解的接收信号中减去剩余码元复制候选，以获得剩余的接收信号，并以剩余接收信号的预期分支度量的递增顺序对剩余信号进行排序; 用于以排序顺序选择符号复本候选者的符号复制候选选择器; 分支度量计算器，用于计算所选择的符号复本候选的分支度量; 以及阈值比较器，用于将所计算的分支度量与预定阈值进行比较; 其中如果所计算的分支度量大于所述预定阈值，则所述分支度量和连续分支度量被删除而不进一步搜索。

8. 发明申请

US20050254589A1 Channel estimation device, channel estimation method, and wireless receiver 有权
标题翻译：信道估计装置，信道估计方法和无线接收机
公开(公告)号：US20050254589A1
公开(公告)日：2005-11-17
申请号：US11128191
申请日：2005-05-13
申请人： Kenichi Higuchi , Hiroyuki Kawai , Noriyuki Maeda , Mamoru Sawahashi
发明人： Kenichi Higuchi , Hiroyuki Kawai , Noriyuki Maeda , Mamoru Sawahashi
IPC分类号： H04J99/00 , H03D1/04 , H04B7/04 , H04B7/10 , H04B7/26 , H04J1/02 , H04J11/00 , H04L25/02
CPC分类号： H04L25/0234 , H04L25/0204
摘要： A channel estimation device is provided to achieve high-precision channel estimation in a MIMO or multicarrier wireless receiver. This channel estimation device is used in the wireless receiver that receives pilot signals through reception antennas. The pilot signals are modulated by a multicarrier method and are transmitted from transmission antennas. The pilot signals are orthogonal to one another. The channel estimation device includes: an estimation unit that determines a channel estimate value for each unit time slot and each unit sub carrier; and an averaging unit that averages the channel estimate values over time slots including a target time slot and sub carriers including a target sub carrier, thereby determining an average channel estimate value.
摘要翻译：提供信道估计装置以在MIMO或多载波无线接收机中实现高精度信道估计。该信道估计装置用于通过接收天线接收导频信号的无线接收机。导频信号由多载波方式调制，并从发射天线发射。导频信号彼此正交。信道估计装置包括：估计单元，其确定每个单位时隙的信道估计值和每个单位子载波; 以及平均单元，其对包括目标时隙的时隙和包括目标子载波的子载波的时隙进行平均，从而确定平均信道估计值。

9. 发明授权

US08725186B2 Base station apparatus, user equipment and precoding method 有权
标题翻译：基站装置，用户设备和预编码方法
公开(公告)号：US08725186B2
公开(公告)日：2014-05-13
申请号：US13119901
申请日：2009-09-18
申请人： Hidekazu Taoka , Yuichi Kakishima , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
发明人： Hidekazu Taoka , Yuichi Kakishima , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
IPC分类号： H04B7/00
CPC分类号： H04W72/085 , H04B7/0615 , H04B7/0658 , H04L5/0023 , H04L5/0037 , H04L5/0053 , H04L5/006 , H04L5/0091 , H04L25/03343 , H04L2025/03426 , H04L2025/03802 , H04W72/0413
摘要： The present invention provides a base station apparatus capable of preventing degrading of throughput performance even when feedback information amount on precoding in uplink MIMO transmission is reduced. This base station (200) has a scheduler (231) for determining resource blocks used in wireless communications with each mobile station (100) adaptively, a precoding weight selecting section (232) for selecting a precoding weight for controlling phase and/or amplitude of a transmission signal for each antenna in the mobile station (100) based on reception quality on uplink at the resource blocks determined to the mobile station (100); and transmission/reception sections (206a and 206b) for transmitting the determined precoding weight to the mobile station (100).
摘要翻译：本发明提供一种即使在上行链路MIMO传输中的预编码的反馈信息量减少的情况下也能够防止吞吐量性能的劣化的基站装置。该基站（200）具有调度器（231），用于自适应地确定与每个移动台（100）的无线通信中使用的资源块;预编码权重选择部（232），用于选择用于控制相位和/或幅度的预编码权重基于对移动台（100）确定的资源块的上行链路的接收质量，移动站（100）中的每个天线的发送信号; 以及用于将确定的预编码权重发送到移动台（100）的发送/接收部分（206a和206b）。

10. 发明申请

US20110256897A1 BASE STATION APPARATUS, USER EQUIPMENT AND PRECODING METHOD 有权
标题翻译：基站设备，用户设备和预处理方法
公开(公告)号：US20110256897A1
公开(公告)日：2011-10-20
申请号：US13119901
申请日：2009-09-18
申请人： Hidekazu Taoka , Yuichi Kakishima , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
发明人： Hidekazu Taoka , Yuichi Kakishima , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
IPC分类号： H04W72/04 , H04B7/24
CPC分类号： H04W72/085 , H04B7/0615 , H04B7/0658 , H04L5/0023 , H04L5/0037 , H04L5/0053 , H04L5/006 , H04L5/0091 , H04L25/03343 , H04L2025/03426 , H04L2025/03802 , H04W72/0413
摘要： The present invention provides a base station apparatus capable of preventing degrading of throughput performance even when feedback information amount on precoding in uplink MIMO transmission is reduced. This base station (200) has a scheduler (231) for determining resource blocks used in wireless communications with each mobile station (100) adaptively, a precoding weight selecting section (232) for selecting a precoding weight for controlling phase and/or amplitude of a transmission signal for each antenna in the mobile station (100) based on reception quality on uplink at the resource blocks determined to the mobile station (100); and transmission/reception sections (206a and 206b) for transmitting the determined precoding weight to the mobile station (100).
摘要翻译：本发明提供一种即使在上行链路MIMO传输中的预编码的反馈信息量减少的情况下也能够防止吞吐量性能的劣化的基站装置。该基站（200）具有调度器（231），用于自适应地确定与每个移动台（100）的无线通信中使用的资源块;预编码权重选择部（232），用于选择用于控制相位和/或幅度的预编码权重基于对移动台（100）确定的资源块的上行链路的接收质量，移动站（100）中的每个天线的发送信号; 以及用于将确定的预编码权重发送到移动台（100）的发送/接收部分（206a和206b）。

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