公开(公告)号：US08494076B2

公开(公告)日：2013-07-23

申请号：US12923852

申请日：2010-10-12

申请人： Shigenori Hayase ,  Masaaki Shida ,  Keisuke Yamamoto

发明人： Shigenori Hayase ,  Masaaki Shida ,  Keisuke Yamamoto

IPC分类号： H04L1/02 ,  H04B7/02

CPC分类号： H04B7/0854 ,  H04B7/0615

摘要： In a MIMO wireless communication system, the transformation process synthesizes the eigenmodes having a large singular value (i.e. a high effective SNR) and the eigenmodes having a small singular value (i.e. a low effective SNR). Thereby, the former eigenmodes are converted into modes having suppressed effective SNR which do not require a large number of levels of modulation, and the latter eigenmodes are converted into modes having increased effective SNR instead. In a MIMO wireless communication system for eigenmode transmission, a large communication capacity is realized without increasing the number of levels of modulation even in a communication environment capable of achieving a high SNR.

摘要翻译： 在MIMO无线通信系统中，变换过程合成具有大奇异值（即高有效SNR）的本征模和具有小奇异值的本征模（即低有效SNR）。 因此，前者本征模式被转换为具有抑制的有效SNR的模式，其不需要大量的调制电平，并且后者本征模式被转换成具有增加的有效SNR的模式。 在用于本征模式传输的MIMO无线通信系统中，即使在能够实现高SNR的通信环境中也可实现大的通信容量而不增加调制电平的数量。

公开(公告)号：US08363634B2

公开(公告)日：2013-01-29

申请号：US11797180

申请日：2007-05-01

申请人： Keisuke Yamamoto ,  Shigenori Hayase ,  Masaaki Shida

发明人： Keisuke Yamamoto ,  Shigenori Hayase ,  Masaaki Shida

IPC分类号： H04J3/00 ,  H04J3/24 ,  H04J3/18 ,  H04M1/00

CPC分类号： H04W72/1263 ,  H04L1/0018

摘要： In a system in which a host and a plurality of terminals simultaneously communicate with each other under the SDMA scheme, transmission parameters to be used for generating frames for SDMA transmission to the respective terminals are adjusted in consideration of the transmission time durations necessary for transmission of other frames to be transmitted simultaneously with the first-mentioned frames, so that differences between the frame transmission time durations are reduced.

摘要翻译： 在其中主机和多个终端在SDMA方案下同时进行通信的系统中，考虑到发送所需的传输时间长度来调整用于生成用于SDMA传输到各个终端的帧的传输参数 要与第一帧同时发送的其他帧，从而减少帧传输时间间隔之间的差异。

公开(公告)号：US08315338B2

公开(公告)日：2012-11-20

申请号：US13043433

申请日：2011-03-08

申请人： Shigenori Hayase ,  Kazuyuki Hori

发明人： Shigenori Hayase ,  Kazuyuki Hori

IPC分类号： H04L27/00

CPC分类号： H03D7/163 ,  H03D3/245 ,  H04L27/3863

摘要： To detect phase mismatches between in-phase and quadrature signals of a quadrature demodulator. The phase mismatches can be detected using the signals obtained by removing high frequency components of output of a multiplier by a low pass filter, the output being the product of the in-phase signals of which low frequency components are removed by a first high pass filter by the quadrature signals of which low frequency components are removed by a second high pass filter.

摘要翻译： 检测正交解调器的同相和正交信号之间的相位失配。 可以使用通过低通滤波器去除乘法器的输出的高频分量而获得的信号来检测相位失配，该输出是通过第一高通滤波器去除低频分量的同相信号的乘积 通过第二高通滤波器去除低频分量的正交信号。

公开(公告)号：US08310995B2

公开(公告)日：2012-11-13

申请号：US11797321

申请日：2007-05-02

申请人： Shinji Murai ,  Tomoaki Ishifuji ,  Takashi Yano ,  Masaaki Shida ,  Shigenori Hayase

发明人： Shinji Murai ,  Tomoaki Ishifuji ,  Takashi Yano ,  Masaaki Shida ,  Shigenori Hayase

IPC分类号： H04W4/00

CPC分类号： H04W72/085 ,  H04W28/18 ,  H04W72/046

摘要： In a wireless communication system for communicating with a plurality of stations at the same point of time with the same frequency using a Space Division Multiple Access (SDMA), wireless resources are allocated by a first decision unit which evaluates performance of each station obtained when the SDMA is used and which determines periods of time to be allocated to groups of stations formed according to the SDMA technique. Using a first evaluation unit and a second evaluation unit to evaluate performance required by each station and each application, the first decision unit allocates the wireless resources to the stations. It is therefore possible that the wireless resources are efficiently allocated to the stations while preventing an event in which the wireless resources are excessive or insufficient for required quality of service.

摘要翻译： 在用于使用空分多址（SDMA）以相同频率在同一时间点与多个站进行通信的无线通信系统中，无线资源由第一决策单元分配，该第一决策单元评估当 使用SDMA，并确定要分配给根据SDMA技术形成的站组的时间段。 使用第一评估单元和第二评估单元来评估每个站点和每个应用所需的性能，第一决策单元向站点分配无线资源。 因此，可以将无线资源有效地分配给站，同时防止无线资源过多或不足以满足所需服务质量的事件。

公开(公告)号：US20110242962A1

公开(公告)日：2011-10-06

申请号：US13126405

申请日：2008-10-28

申请人： Shigenori Hayase ,  Takashi Yano ,  Yunjian Jia

发明人： Shigenori Hayase ,  Takashi Yano ,  Yunjian Jia

IPC分类号： H04J11/00

CPC分类号： H04B7/0426

摘要： The present invention achieves a communication speed close to a theoretical limitation with suppressing a computing amount and without increasing protocol overhead. In a multiuser MIMO wireless communication method according to the present invention, a receive weight matrix is determined based on a channel matrix, the channel matrix is updated by a product of the receive weight matrix and a channel matrix, a transmitted signal is generated in a ZF-DPC method based on the updated channel matrix and transmitted, and the receive weight matrix is multiplied with a received signal and then subjected to a DPC decoding. A method of determining a receive weight matrix is to take a conjugate transpose matrix of a left singular matrix obtained when subjecting the channel matrix to a singular value decomposition.

摘要翻译： 本发明通过抑制计算量并且不增加协议开销来实现接近理论限制的通信速度。 在根据本发明的多用户MIMO无线通信方法中，基于信道矩阵确定接收权重矩阵，通过接收权重矩阵和信道矩阵的乘积更新信道矩阵，发送信号在 基于更新的信道矩阵并发送的ZF-DPC方法，并将接收权重矩阵与接收信号相乘，然后进行DPC解码。 一种确定接收权重矩阵的方法是采用将信道矩阵进行奇异值分解时获得的左奇异矩阵的共轭转置矩阵。

公开(公告)号：US20110212744A1

公开(公告)日：2011-09-01

申请号：US12986377

申请日：2011-01-07

申请人： Rintaro KATAYAMA ,  Satoshi Tamaki ,  Tomonori Yamamoto ,  Hirotake Ishii ,  Shigenori Hayase

发明人： Rintaro KATAYAMA ,  Satoshi Tamaki ,  Tomonori Yamamoto ,  Hirotake Ishii ,  Shigenori Hayase

IPC分类号： H04W52/06

CPC分类号： H04W52/143 ,  H04W52/241 ,  H04W52/245

摘要： A communication device includes pilot signal sending part and transmit power control part and holds a criterion value indicating target channel quality for mobile stations within the area covered by the base station. It creates quality data from reports from one or plural mobile stations, stores the quality data, creates a first representative value indicating average channel quality for the mobile station(s) from the stored quality data, and changes the transmit power depending on the result of comparison between the first representative value and the criterion value. It creates a second representative value indicating distribution of low channel quality from the stored quality data and updates the criterion value depending on the result of comparison between the second representative value and the criterion value.

摘要翻译： 通信设备包括导频信号发送部分和发射功率控制部分，并且保持指示由基站覆盖的区域内的移动台的目标信道质量的标准值。 它从一个或多个移动站的报告创建质量数据，存储质量数据，从存储的质量数据创建指示移动站的平均信道质量的第一代表值，并且根据所存储的质量数据的结果来改变发送功率 第一代表值与标准值之间的比较。 它从存储的质量数据创建指示低通道质量的分布的第二代表值，并且根据第二代表值与标准值之间的比较结果来更新标准值。

公开(公告)号：US20110158353A1

公开(公告)日：2011-06-30

申请号：US13043433

申请日：2011-03-08

申请人： Shigenori HAYASE ,  Kazuyuki Hori

发明人： Shigenori HAYASE ,  Kazuyuki Hori

IPC分类号： H04L27/00

CPC分类号： H03D7/163 ,  H03D3/245 ,  H04L27/3863

摘要： To detect phase mismatches between in-phase and quadrature signals of a quadrature demodulator. The phase mismatches can be detected using the signals obtained by removing high frequency components of output of a multiplier by a low pass filter, the output being the product of the in-phase signals of which low frequency components are removed by a first high pass filter by the quadrature signals of which low frequency components are removed by a second high pass filter.

摘要翻译： 检测正交解调器的同相和正交信号之间的相位失配。 可以使用通过低通滤波器去除乘法器的输出的高频分量而获得的信号来检测相位失配，该输出是通过第一高通滤波器去除低频分量的同相信号的乘积 通过第二高通滤波器去除低频分量的正交信号。

公开(公告)号：US20100278279A1

公开(公告)日：2010-11-04

申请号：US12805062

申请日：2010-07-09

申请人： Masaaki Shida ,  Shigenori Hayase ,  Keisuke Yamamoto

发明人： Masaaki Shida ,  Shigenori Hayase ,  Keisuke Yamamoto

IPC分类号： H04B7/02

CPC分类号： H04L1/1867 ,  H04B7/0417 ,  H04B7/0626 ,  H04L1/0003 ,  H04L1/06 ,  H04L1/1812

摘要： A MIMO wireless data transmission system including a data arrangement in which data to be sent is divided for each transmission stream of MIMO with adding an error detection code thereto and thereby resending a subframe's worth of data when an error occurred at the time of resending. It therefore becomes to avoid the same frame being sent again at the time of resending.

摘要翻译： 一种MIMO无线数据传输系统，包括数据排列，其中，为每个MIMO发送流划分要发送的数据，并添加错误检测码，从而在重新发送时发生错误时重新发送子帧的数据。 因此，避免在重新发送时再次发送相同的帧。

公开(公告)号：US07660288B2

公开(公告)日：2010-02-09

申请号：US11493556

申请日：2006-07-27

申请人： Masaaki Shida ,  Shigenori Hayase ,  Tomoaki Ishifuji

发明人： Masaaki Shida ,  Shigenori Hayase ,  Tomoaki Ishifuji

IPC分类号： H04J1/00

CPC分类号： H04L27/2649 ,  H04B7/0417 ,  H04B7/0626 ,  H04L25/0204 ,  H04L27/2657 ,  H04L27/2662 ,  H04L2025/03426 ,  H04L2027/0024

摘要： Disclosed is a wireless communication system capable of performing demodulation at the receiving side without substantially deteriorating BER characteristics, regardless of carrier frequency error existing among plural wireless communication systems in SDMA of uplink. The wireless communication system includes plural antennas; a MIMO processor that decomposes a reception signal the plural antennas received from plural transmitters into transmission signals transmitted from the respective transmitters; a FFT processor that carries out OFDM demodulation; and a demapping unit that obtains data from signals which were previously converted into sub-carrier signals by the FFT processor, in which the MIMO processor is installed ahead of the FFT processor for sake of the processing sequence of a receive signal, and even though a carrier frequency offset exists in the reception signal MIMO processing is performed prior to OFDM demodulation to split the reception signal from plural transmitters.

摘要翻译： 公开了无论在上行链路的SDMA中的多个无线通信系统中存在的载波频率误差如何，都能够在接收侧进行解调而不使BER特性实质恶化的无线通信系统。 无线通信系统包括多个天线; 将从多个发射机接收的多个天线的接收信号分解为从各个发射机发射的传输信号的MIMO处理器; 执行OFDM解调的FFT处理器; 以及解映射单元，其通过FFT处理器从先前被转换为子载波信号的信号获得数据，其中为处理接收信号的处理顺序而将MIMO处理器安装在FFT处理器之前，并且即使 载波频率偏移存在于接收信号中，在OFDM解调之前执行MIMO处理，以分割来自多个发射机的接收信号。

公开(公告)号：US20070166052A1

公开(公告)日：2007-07-19

申请号：US11711951

申请日：2007-02-27

申请人： Tetsuya Uda ,  Shigehiro Takashima ,  Shigenori Hayase ,  Yoshimasa Kusano ,  Satoshi Asamizu ,  Hirofumi Nakano

发明人： Tetsuya Uda ,  Shigehiro Takashima ,  Shigenori Hayase ,  Yoshimasa Kusano ,  Satoshi Asamizu ,  Hirofumi Nakano

IPC分类号： H04B10/00

CPC分类号： H04B10/294 ,  H04J14/0221

摘要： Optical signal transmission is improved by reducing the variance in light output level and OSNR by adjusting optical signal intensity and gain tilt, taking SRS influence into consideration.

摘要翻译： 通过调整光信号强度和增益倾斜，通过减小光输出电平和OSNR的差异来改善光信号传输，考虑SRS影响。