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1. 发明申请

US20070274256A1 Systems and methods for wireless communication 有权
标题翻译：用于无线通信的系统和方法
公开(公告)号：US20070274256A1
公开(公告)日：2007-11-29
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： H04Q7/00
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。

2. 发明授权

US08310995B2 Systems and methods for wireless communication using SDMA 有权
标题翻译：使用SDMA进行无线通信的系统和方法
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。

3. 发明授权

US07660288B2 Radio communication device 失效
标题翻译：无线通信设备
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。

4. 发明申请

US20070086400A1 Radio communication device 失效
标题翻译：无线通信设备
公开(公告)号：US20070086400A1
公开(公告)日：2007-04-19
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： H04Q7/24
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。

5. 发明申请

US20070081450A1 WIRELESS DATA COMMUNICATION SYSTEM, WIRELESS DATA COMMUNICATION METHOD AND COMMUNICATION APPARATUS 有权
标题翻译：无线数据通信系统，无线数据通信方法和通信装置
公开(公告)号：US20070081450A1
公开(公告)日：2007-04-12
申请号：US11493821
申请日：2006-07-27
申请人： Shigenori Hayase , Shinji Murai , Tomoaki Ishifuji
发明人： Shigenori Hayase , Shinji Murai , Tomoaki Ishifuji
IPC分类号： H04J11/00
CPC分类号： H04B7/0617
摘要： A wireless communication system has no limitation in the number of AP antennas and UT antennas, and determines the parallel-communication data units to be a maximum value of MIMO communication, such that it provides a MIMO-SDMA wireless data communication system having superior transmission characteristics. The MIMO-SDMA wireless data communication system includes a single AP (Access Point) and U UTs (User Terminals) communicating with the AP using the same frequency signal at the same time. The UT includes the SDMA reception (Rx) processor, and synthesizes Rx signals of antennas, such that it controls the number of Rx data units. By the control of the number of Rx data units, the communication system controls the number of parallel-communication data units to be equal to a maximum value capable of being implemented by the MIMO-SDMA wireless data communication. The AP informs the UTs of a coefficient matrix required for the SDMA Rx process, prior to transmitting actual data.
摘要翻译：无线通信系统对AP天线和UT天线的数量没有限制，并且将并行通信数据单元确定为MIMO通信的最大值，使得其提供具有优异传输特性的MIMO-SDMA无线数据通信系统。 MIMO-SDMA无线数据通信系统包括使用相同频率信号同时与AP通信的单个AP（接入点）和U UT（用户终端）。 UT包括SDMA接收（Rx）处理器，并且合成天线的Rx信号，使得它控制Rx数据单元的数量。通过控制Rx数据单元的数量，通信系统将并行通信数据单元的数量控制为能够通过MIMO-SDMA无线数据通信实现的最大值。在发送实际数据之前，AP向UT通知SDMA Rx进程所需的系数矩阵。

6. 发明授权

US07209765B1 Wireless data communication system, wireless data communication method and communication apparatus 有权
标题翻译：无线数据通信系统，无线数据通信方式和通信装置
公开(公告)号：US07209765B1
公开(公告)日：2007-04-24
申请号：US11493821
申请日：2006-07-27
申请人： Shigenori Hayase , Shinji Murai , Tomoaki Ishifuji
发明人： Shigenori Hayase , Shinji Murai , Tomoaki Ishifuji
IPC分类号： H04Q7/20
CPC分类号： H04B7/0617
摘要： A wireless communication system has no limitation in the number of AP antennas and UT antennas, and determines the parallel-communication data units to be a maximum value of MIMO communication, such that it provides a MIMO-SDMA wireless data communication system having superior transmission characteristics. The MIMO-SDMA wireless data communication system includes a single AP (Access Point) and U UTs (User Terminals) communicating with the AP using the same frequency signal at the same time. The UT includes the SDMA reception (Rx) processor, and synthesizes Rx signals of antennas, such that it controls the number of Rx data units. By the control of the number of Rx data units, the communication system controls the number of parallel-communication data units to be equal to a maximum value capable of being implemented by the MIMO-SDMA wireless data communication. The AP informs the UTs of a coefficient matrix required for the SDMA Rx process, prior to transmitting actual data.
摘要翻译：无线通信系统对AP天线和UT天线的数量没有限制，并且将并行通信数据单元确定为MIMO通信的最大值，使得其提供具有优异传输特性的MIMO-SDMA无线数据通信系统。 MIMO-SDMA无线数据通信系统包括使用相同频率信号同时与AP通信的单个AP（接入点）和U UT（用户终端）。 UT包括SDMA接收（Rx）处理器，并且合成天线的Rx信号，使得它控制Rx数据单元的数量。通过控制Rx数据单元的数量，通信系统将并行通信数据单元的数量控制为能够通过MIMO-SDMA无线数据通信实现的最大值。在发送实际数据之前，AP向UT通知SDMA Rx进程所需的系数矩阵。

7. 发明授权

US08155219B2 Apparatus and method for peak suppression in wireless communication systems 有权
标题翻译：无线通信系统中峰值抑制的装置和方法
公开(公告)号：US08155219B2
公开(公告)日：2012-04-10
申请号：US12175572
申请日：2008-07-18
申请人： Shigenori Hayase , Takashi Yano , Masaaki Shida , Keisuke Yamamoto , Yunjian Jia
发明人： Shigenori Hayase , Takashi Yano , Masaaki Shida , Keisuke Yamamoto , Yunjian Jia
IPC分类号： H04K1/10
CPC分类号： H04L27/2623 , H04L5/0023 , H04L5/006 , H04L25/0224 , H04L27/2626 , H04L27/2647
摘要： A method for suppressing the peak-to-average power ratio (PAPR) while limiting deterioration in signal characteristics in wireless communication devices utilizing wireless communication methods (OFDM method, MIMO method) for multiplexing and sending multiple signals. A weight calculator unit sets a large weight for transmit signals whose channel quality is poor, relative to the weight of each base component based on the acquired channel quality. A peak detector unit detects the peak from the signal string after unitary conversion, and extracts a distortion component to apply for suppressing the peak. A peak suppression signal generation unit calculates the peak signal from the distortion component and weight of each base component, to add to each base component, and adds the peak suppression signal to each base component prior to unitary transformation.
摘要翻译：一种抑制峰值与平均功率比（PAPR）的方法，同时利用用于复用和发送多个信号的无线通信方法（OFDM方法，MIMO方法）来限制无线通信装置中的信号特性的劣化。权重计算器单元基于所获取的信道质量，相对于每个基本分量的权重，对信道质量差的发送信号设置较大的权重。峰值检测器单元在单位转换之后从信号串检测峰值，并提取失真分量以应用于抑制峰值。峰值抑制信号生成单元根据每个基本分量的失真分量和权重来计算峰值信号，以添加到每个基本分量，并且在单一变换之前将峰值抑制信号加到每个基本分量。

8. 发明申请

US20090060070A1 Apparatus and Method for Peak Suppression in Wireless Communication Systems 有权
标题翻译：无线通信系统中峰值抑制的装置和方法
公开(公告)号：US20090060070A1
公开(公告)日：2009-03-05
申请号：US12175572
申请日：2008-07-18
申请人： Shigenori Hayase , Takashi Yano , Masaaki Shida , Keisuke Yamamoto , Yunjian Jia
发明人： Shigenori Hayase , Takashi Yano , Masaaki Shida , Keisuke Yamamoto , Yunjian Jia
IPC分类号： H04L27/28 , H04L25/49
CPC分类号： H04L27/2623 , H04L5/0023 , H04L5/006 , H04L25/0224 , H04L27/2626 , H04L27/2647
摘要： A method for suppressing the peak-to-average power ratio (PAPR) while limiting deterioration in signal characteristics in wireless communication devices utilizing wireless communication methods (OFDM method, MIMO method) for multiplexing and sending multiple signals. A weight calculator unit sets a large weight for transmit signals whose channel quality is poor, relative to the weight of each base component based on the acquired channel quality. A peak detector unit detects the peak from the signal string after unitary conversion, and extracts a distortion component to apply for suppressing the peak. A peak suppression signal generation unit calculates the peak signal from the distortion component and weight of each base component, to add to each base component, and adds the peak suppression signal to each base component prior to unitary transformation.
摘要翻译：一种抑制峰值与平均功率比（PAPR）的方法，同时利用用于复用和发送多个信号的无线通信方法（OFDM方法，MIMO方法）来限制无线通信装置中的信号特性的劣化。权重计算器单元基于所获取的信道质量，相对于每个基本分量的权重，对信道质量差的发送信号设置较大的权重。峰值检测器单元在单位转换之后从信号串检测峰值，并提取失真分量以应用于抑制峰值。峰值抑制信号生成单元根据每个基本分量的失真分量和权重来计算峰值信号，以添加到每个基本分量，并且在单一变换之前将峰值抑制信号加到每个基本分量。

9. 发明申请

US20080267133A1 MIMO WIRELESS COMMUNICATION SYSTEM, MIMO WIRELESS COMMUNICATION APPARATUSES, AND WIRELESS COMMUNICATION METHOD 审中-公开
标题翻译： MIMO无线通信系统，MIMO无线通信设备和无线通信方法
公开(公告)号：US20080267133A1
公开(公告)日：2008-10-30
申请号：US12032046
申请日：2008-02-15
申请人： Masaaki Shida , Takashi Yano , Shigenori Hayase , Keisuke Yamamoto
发明人： Masaaki Shida , Takashi Yano , Shigenori Hayase , Keisuke Yamamoto
IPC分类号： H04Q7/20
CPC分类号： H04B7/0874 , H04B7/0626 , H04B7/0643 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0057 , H04L1/0068 , H04L1/0071 , H04L1/06
摘要： When a plurality of user stations (STAs) simultaneously communicate with an access point (AP) through an SDMA (Space Division Multiple Access) channel in a MIMO wireless communication system, these STAs control their respective transmission signals such that each signal is received by only a different one of the plurality of antennas at the AP. (It should be noted that the number of these STAs is equal to or smaller than the number of antennas at the AP.) This eliminates the need for the AP to perform MIMO processing, thereby allowing the AP to properly receive and demodulate the signals even if they differ in carrier frequency and transmission timing, which would otherwise result in communication degradation or failure.
摘要翻译：当多个用户站（STA）通过MIMO无线通信系统中的SDMA（空分多址）信道同时与接入点（AP）通信时，这些STA控制它们各自的传输信号，使得每个信号仅被接收在AP处的多个天线中的不同的天线。（应当注意，这些STA的数量等于或小于AP处的天线数量）。这消除了对AP进行MIMO处理的需要，从而允许AP正确地接收和解调信号，甚至如果它们在载波频率和传输时间上不同，否则将导致通信衰减或故障。

10. 发明授权

US07817741B2 MIMO wireless data communication system, MIMO wireless data communication method and MIMO wireless data communication apparatus 有权
标题翻译： MIMO无线数据通信系统，MIMO无线数据通信方式和MIMO无线数据通信装置
公开(公告)号：US07817741B2
公开(公告)日：2010-10-19
申请号：US11785376
申请日：2007-04-17
申请人： Shigenori Hayase , Masaaki Shida , Keisuke Yamamoto
发明人： Shigenori Hayase , Masaaki Shida , Keisuke Yamamoto
IPC分类号： H04B7/01 , H04L1/02
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。

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