公开(公告)号：US20120082129A1

公开(公告)日：2012-04-05

申请号：US13324608

申请日：2011-12-13

申请人： Kimihiko Imamura

发明人： Kimihiko Imamura

IPC分类号： H04W72/04

CPC分类号： H04L5/0053 ,  H04L5/0066

摘要： A method and system optimizes the transmission of a downlink reference signal (DLRS) in a wireless communication system that uses orthogonal division multiple access (OFDMA) for the downlink. Each Node-B (base station) is capable of transmitting the DLRS reference symbols in different subframes of the OFDM radio frame and changing both the number and location of the subframes in response to changing network conditions. The network conditions include the number of terminals being served by the Node-B and multiple access interference (MAI) from adjacent Node-Bs.

摘要翻译： 一种方法和系统优化在对于下行链路使用正交分多址（OFDMA）的无线通信系统中下行链路参考信号（DLRS）的传输。 每个节点B（基站）能够在OFDM无线电帧的不同子帧中发送DLRS参考符号，并且响应于不断变化的网络条件改变子帧的数量和位置。 网络条件包括由节点B服务的终端的数量和来自相邻节点B的多址干扰（MAI）。

公开(公告)号：US08121559B2

公开(公告)日：2012-02-21

申请号：US12692986

申请日：2010-01-25

申请人： Kimihiko Imamura

发明人： Kimihiko Imamura

IPC分类号： H03C7/02 ,  H04B1/02 ,  H04B7/02

CPC分类号： H04B7/0842 ,  H04B7/0634 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0682 ,  H04B7/12 ,  H04W24/00 ,  H04W48/16 ,  H04W48/20 ,  H04W88/02 ,  H04W88/08

摘要： A wireless transmitter includes: a plurality of transmission antennas; a phase rotating unit which adds phase rotation to signals which are respectively input to the plurality of transmission antennas; and a reception unit which receives information on phase control of arbitrary antennas among the plurality of transmission antennas from another party of communication, wherein the phrase rotating unit adds first phase rotation for controlling the maximum delay time between the plurality of transmission antennas depending on whether transmission is performed using frequency diversity or transmission is performed using multi-user diversity and second phase rotation for controlling the phases of the arbitrary antennas among the plurality of transmission antennas based on the information.

摘要翻译： 无线发射机包括：多个发射天线; 相位旋转单元，其将相位旋转相加到分别输入到所述多个发送天线的信号; 以及接收单元，其从另一个通信对方接收关于所述多个发送天线中的任意天线的相位控制的信息，其中，所述短语旋转单元根据传输是否添加用于控制所述多个发送天线之间的最大延迟时间的第一相位旋转 使用频率分集来执行，或者使用多用户分集和第二相位旋转执行传输，以基于该信息来控制多个发送天线中的任意天线的相位。

公开(公告)号：US08121184B2

公开(公告)日：2012-02-21

申请号：US12326581

申请日：2008-12-02

申请人： Kimihiko Imamura

发明人： Kimihiko Imamura

IPC分类号： H03H7/30

CPC分类号： H04B7/0842 ,  H04B7/0634 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0682 ,  H04B7/12 ,  H04W24/00 ,  H04W48/16 ,  H04W48/20 ,  H04W88/02 ,  H04W88/08

摘要： A wireless receiver receiving a signal from a wireless transmitter which includes a plurality of transmission antennas and transmits data to which first phase rotation for controlling the maximum delay time between the plurality of transmission antennas is added and pilot channels corresponding to the plurality of transmission antennas which are orthogonal to each other, where the wireless receiver includes a reception unit which receives the pilot channels and a demodulating unit which demodulates the data.

摘要翻译： 一种从包括多个发送天线的无线发射机接收信号的无线接收机，并且发送用于控制多个发送天线之间的最大延迟时间的第一相旋转的数据和与多个发送天线对应的导频信道， 彼此正交，其中无线接收机包括接收导频信道的接收单元和解调数据的解调单元。

公开(公告)号：US08099063B2

公开(公告)日：2012-01-17

申请号：US12773684

申请日：2010-05-04

申请人： Toshizo Nogami ,  Kimihiko Imamura ,  Ryota Yamada

发明人： Toshizo Nogami ,  Kimihiko Imamura ,  Ryota Yamada

IPC分类号： H03C7/02 ,  H04B1/02 ,  H04B7/02

CPC分类号： H04B7/0671 ,  H04B7/0452 ,  H04B7/0682 ,  H04B7/12

摘要： An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station.

公开(公告)号：US20110269489A1

公开(公告)日：2011-11-03

申请号：US12771974

申请日：2010-04-30

申请人： Ahmad Khoshnevis ,  John M. Kowalski ,  Sayantan Choudhury ,  Kimihiko Imamura

发明人： Ahmad Khoshnevis ,  John M. Kowalski ,  Sayantan Choudhury ,  Kimihiko Imamura

IPC分类号： H04B7/00

CPC分类号： H04L5/0048 ,  H04L25/0202

摘要： A method for assigning and coordinating uplink reference signals for cooperative communication is disclosed. Data about an assigned uplink reference signal sequence used by a wireless communication device is received at a non-serving base station. An uplink reference signal estimate is determined based on the data. The uplink reference signal estimate is used to coherently demodulate a signal received from the wireless communication device or is used to estimate an uplink channel between the non-serving base station and the wireless communication device.

摘要翻译： 公开了一种用于协调通信的上行链路参考信号的分配和协调的方法。 关于由无线通信设备使用的分配的上行链路参考信号序列的数据在非服务基站处被接收。 基于该数据确定上行链路参考信号估计。 上行链路参考信号估计用于相干地解调从无线通信设备接收的信号，或者用于估计非服务基站和无线通信设备之间的上行链路信道。

公开(公告)号：US20110081875A1

公开(公告)日：2011-04-07

申请号：US12572563

申请日：2009-10-02

申请人： Kimihiko Imamura ,  John M. Kowalski ,  Sayantan Choudhury

发明人： Kimihiko Imamura ,  John M. Kowalski ,  Sayantan Choudhury

IPC分类号： H04B1/04 ,  H04B1/02

CPC分类号： H04B7/0689 ,  H04B1/04 ,  H04B7/0871 ,  H04W52/146 ,  H04W52/228 ,  H04W52/34 ,  H04W52/42 ,  H04W72/0413 ,  H04W88/06

摘要： A wireless communication device may autonomously transition from a multiple antenna port mode to a single antenna port mode. The wireless communication device may implicitly notify a base station about the autonomous transition from the multiple antenna port mode to the single antenna port mode. The base station may reallocate resources that were previously allocated to the wireless communication device but that are no longer being used by the wireless communication device. In some cases, the base station may configure the wireless communication device's antenna port mode via radio resource control signaling.

摘要翻译： 无线通信设备可以自主地从多个天线端口模式转换到单个天线端口模式。 无线通信设备可以隐含地通知基站关于从多天线端口模式到单天线端口模式的自主转换。 基站可以重新分配先前分配给无线通信设备但是不再被无线通信设备使用的资源。 在某些情况下，基站可以通过无线资源控制信令来配置无线通信设备的天线端口模式。

公开(公告)号：US20100120388A1

公开(公告)日：2010-05-13

申请号：US12693058

申请日：2010-01-25

申请人： Kimihiko Imamura

发明人： Kimihiko Imamura

IPC分类号： H04B1/16

CPC分类号： H04B7/0842 ,  H04B7/0634 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0682 ,  H04B7/12 ,  H04W24/00 ,  H04W48/16 ,  H04W48/20 ,  H04W88/02 ,  H04W88/08

摘要： A wireless receiver that includes a reception unit which, in the case in which the frequency bandwidth of the chunk is Fc, receives a) data to which phase rotation for controlling the maximum delay time between the plurality of transmission antennas is added so that the maximum delay time is set to either a predetermined first value which is smaller than 1/Fc or a predetermined second value which is larger than 1/Fc depending on whether transmission is performed using frequency diversity or transmission is performed using multi-user diversity and b) pilot channels corresponding to the plurality of transmission antennas which are orthogonal to each other; and a demodulating unit which demodulates the data based on transfer functions calculated using the pilot channels.

摘要翻译： 一种无线接收机，包括接收单元，所述接收单元在所述块的频率带宽为Fc的情况下接收到a）添加了用于控制所述多个发送天线之间的最大延迟时间的相位旋转的数据，使得最大值 延迟时间被设定为小于1 / Fc的预定第一值或大于1 / Fc的预定第二值，这取决于使用多用户分集执行是否使用频率分集或传输来执行传输，以及b） 对应于彼此正交的多个发送天线的导频信道; 以及解调单元，其基于使用导频信道计算的传递函数来解调数据。

公开(公告)号：US20100016005A1

公开(公告)日：2010-01-21

申请号：US12526216

申请日：2008-01-30

申请人： Yasuo Sugawara ,  Shohei Yamada ,  Daiichiro Nakashima ,  Yasuyuki Kato ,  Katsunari Uemura ,  Waho Oh ,  Kimihiko Imamura

发明人： Yasuo Sugawara ,  Shohei Yamada ,  Daiichiro Nakashima ,  Yasuyuki Kato ,  Katsunari Uemura ,  Waho Oh ,  Kimihiko Imamura

IPC分类号： H04B7/00

CPC分类号： H04W72/1284 ,  H04J13/0059 ,  H04L1/0026 ,  H04L5/0048 ,  H04L5/0091 ,  H04L12/40013 ,  H04L27/2613 ,  H04W56/0005

摘要： A communication terminal apparatus requests resource allocation to a communication control apparatus without allocating any dedicated resource for resource request. The communication terminal apparatus is applied to a wireless communication system in which the communication control apparatus allocates resources used when a communication terminal apparatus 200 performs wireless transmission to a communication control apparatus 100. The communication terminal apparatus includes: a determination unit 210 determining whether to make resource request to the communication control apparatus 100; and a signal control unit 211 which transmits a signal used to maintain time-frequency synchronization with the communication control apparatus 100 to the communication control apparatus 100 according to a first transmission procedure for maintaining the synchronization, while transmitting the signal to the communication control apparatus 100 according to a second transmission procedure indicating resource request when the determination unit 210 has determined to make resource request.

摘要翻译： 通信终端装置向通信控制装置请求资源分配，而不分配用于资源请求的专用资源。 通信终端装置被应用于通信控制装置分配当通信终端装置200向通信控制装置100进行无线发送时使用的资源的无线通信系统。通信终端装置包括：判定部210， 向通信控制装置100提供资源请求; 以及信号控制单元211，其将通信控制装置100的时间 - 频率同步的信号发送到通信控制装置100，根据用于维持同步的第一传输过程，将信号发送到通信控制装置100 当确定单元210确定作出资源请求时，根据指示资源请求的第二传输过程。

公开(公告)号：US07561510B2

公开(公告)日：2009-07-14

申请号：US11116282

申请日：2005-04-28

申请人： Kimihiko Imamura ,  Daiichiro Nakashima

发明人： Kimihiko Imamura ,  Daiichiro Nakashima

IPC分类号： H04J9/00

CPC分类号： H04W16/14 ,  H04W74/04 ,  H04W84/12

摘要： A high-speed wireless LAN system capable of avoiding a collision of packets and maintaining the original transmission speed is provided. A transmitter is applied to an HT terminal using a second frequency band wider than a first frequency band used by a legacy terminal, in which an HT sequence is started after a legacy beacon as an occupation signal and a legacy CTS are transmitted using every frequency in the second frequency band. Due to this, an NAV is set at the legacy terminal and packets are no longer transmitted from the legacy terminal. As a result, a collision of packets is avoided and it becomes possible to perform communication between HT terminals at the original transmission speed.

摘要翻译： 提供了能够避免分组冲突并保持原始传输速度的高速无线LAN系统。 使用比传统终端使用的第一频带宽的第二频带将发射机应用到HT终端，其中在作为占用信号的传统信标和传统CTS之后开始HT序列，并且使用每个频率 第二频带。 由此，在遗留终端设置了NAV，并且不再从传统终端发送分组。 结果，避免了分组的冲突，并且可以以原始传输速度在HT终端之间进行通信。

公开(公告)号：US20090168923A1

公开(公告)日：2009-07-02

申请号：US12374249

申请日：2007-07-19

申请人： Kimihiko Imamura ,  Yasuhiro Hamaguchi ,  Yasuyuki Kato ,  Daiichiro Nakashima

发明人： Kimihiko Imamura ,  Yasuhiro Hamaguchi ,  Yasuyuki Kato ,  Daiichiro Nakashima

IPC分类号： H04L27/00

CPC分类号： H04L25/0232 ,  H04B7/0671 ,  H04L1/0033 ,  H04L1/0042 ,  H04L1/04 ,  H04L5/0044 ,  H04L25/0204 ,  H04L25/022 ,  H04L27/2626 ,  H04L27/2627 ,  H04L27/2647 ,  H04L27/265

摘要： A multicarrier-signal receiving apparatus includes: a Fourier-transformer that performs a Fourier transform, on reception signals to extract subcarriers; a channel estimator that performs channel estimation on one of the extracted subcarriers using channel estimation symbols included in a subcarrier group to which the one of the extracted subcarriers belongs, the subcarrier group including subcarriers to which an identical phase rotation is added upon transmission; and a channel compensator that performs channel compensation on data symbols included in the one of the extracted subcarriers using a result of the channel estimation performed by the channel estimator on the one of the extracted subcarriers.

摘要翻译： 多载波信号接收装置包括：对接收信号进行傅立叶变换的傅里叶变换器，以提取子载波; 信道估计器，其使用包括在所提取的子载波中的一个子载波所属的子载波组中的信道估计符号，在所提取的子载波之一上执行信道估计，所述子载波组包括在发送时相加相同旋转的副载波; 以及信道补偿器，使用在所提取的子载波之一上由信道估计器执行的信道估计的结果，对包括在所提取的一个子载波中的一个的数据符号执行信道补偿。