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1. 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。

2. 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。

3. 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。

4. 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。

5. 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。

6. 发明授权

US07319684B2 System and method for wireless communication using a management server and access points 有权
标题翻译：使用管理服务器和接入点进行无线通信的系统和方法
公开(公告)号：US07319684B2
公开(公告)日：2008-01-15
申请号：US10449100
申请日：2003-06-02
申请人： Tsuyoshi Tamaki , Takashi Yano , Takaki Uta , Tomoaki Ishifuji
发明人： Tsuyoshi Tamaki , Takashi Yano , Takaki Uta , Tomoaki Ishifuji
IPC分类号： H04B7/212 , H04B7/00 , H04J3/06
CPC分类号： H04W52/243 , H04L41/00 , H04W16/28 , H04W28/14 , H04W72/1231 , H04W74/0816
摘要： A system and method are provided for wireless communication. In one example, a wireless communication system that enhances total system throughput is provided. The system performs parallel data transmission from a plurality of access points to a plurality of user terminals. On terminals with power control function, their transmit power can be set to minimize interference. The wireless communication system comprises a management server which performs centralized management of time of access-point-to-terminal packet transmission, access points, and user terminals that perform data transmission, according to transmission time control information from the management server. Transmit queues for measuring downlink traffic and receive queues for measuring uplink traffic are provided on the access points or the management server. The system determines uplink and downlink periods from the transmit and receive queue lengths. The system also controls the access points and user terminals to transmit for the determined periods. Consequently, packet collision due to transmission from a terminal that interferes with neighboring terminals is eliminated. Thus, system throughput is enhanced.
摘要翻译：提供了一种用于无线通信的系统和方法。在一个示例中，提供了增强总系统吞吐量的无线通信系统。系统执行从多个接入点到多个用户终端的并行数据传输。在具有电源控制功能的终端上，可以设置其发射功率以最小化干扰。无线通信系统包括管理服务器，其根据来自管理服务器的传输时间控制信息，对接入点到终端分组传输的时间进行集中管理，接入点和执行数据传输的用户终端。在接入点或管理服务器上提供用于测量下行链路流量的发送队列和用于测量上行链路流量的接收队列。系统从发送和接收队列长度确定上行链路和下行链路周期。系统还控制接入点和用户终端在确定的时间段内进行传输。因此，消除了来自与邻近终端干扰的终端的传输的分组冲突。因此，提高了系统吞吐量。

7. 发明授权

US06556943B2 Position calculation method and position calculation apparatus 有权
公开(公告)号：US06556943B2
公开(公告)日：2003-04-29
申请号：US09918641
申请日：2001-08-01
申请人： Mikio Kuwahara , Tomoaki Ishifuji , Takashi Yano , Kenzaburo Fujishima
发明人： Mikio Kuwahara , Tomoaki Ishifuji , Takashi Yano , Kenzaburo Fujishima
IPC分类号： H04Q720
CPC分类号： G01S5/14
摘要： A position calculation method that calculates the correct position of a terminal even when errors are not distributed symmetrically for positive and negative values, by calculating the position of a terminal using the delay time of received signals. The method calculates a first range that is a difference between a range from the terminal to each of antenna and a range from the terminal to a base antenna, the range being calculated from a wireless signal delay time; calculates a second range that is a difference between a range from an assumed terminal position for calculation to each antenna and a range from the assumed terminal position for calculation to the base antenna; calculates a likelihood of the position of the terminal, repeats these procedures to obtain a point where the likelihood is maximized, and determines an obtained most likely solution as the position of the terminal.

8. 发明授权

US06671649B2 Position calculation method and position calculation apparatus 失效
公开(公告)号：US06671649B2
公开(公告)日：2003-12-30
申请号：US10390721
申请日：2003-03-19
申请人： Mikio Kuwahara , Tomoaki Ishifuji , Takashi Yano , Kenzaburo Fujishima
发明人： Mikio Kuwahara , Tomoaki Ishifuji , Takashi Yano , Kenzaburo Fujishima
IPC分类号： G01C1700
CPC分类号： G01S5/14
摘要： A position calculation method that calculates the correct position of a terminal even when errors are not distributed symmetrically for positive and negative values, by calculating the position of a terminal using the delay time of received signals. The method calculates a first range that is a difference between a range from the terminal to each of antenna and a range from the terminal to a base antenna, the range being calculated from a wireless signal delay time; calculates a second range that is a difference between a range from an assumed terminal position for calculation to each antenna and a range from the assumed terminal position for calculation to the base antenna; calculates a likelihood of the position of the terminal, repeats these procedures to obtain a point where the likelihood is maximized, and determines an obtained most likely solution as the position of the terminal.

9. 发明申请

US20110242962A1 Method of Multiuser Mimo Wireless Communication and Device of Multiuser Mimo Wireless Communication 审中-公开
标题翻译：多用户Mimo无线通信的方法和多用户Mimo无线通信的设备
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。

10. 发明申请

US20090060073A1 METHOD FOR SUPPRESSING PEAK POWER OF ORTHOGONALLY MULTIPLEXED SIGNAL, PEAK POWER SUPPRESSING CIRCUIT, AND TRANSMITTER 有权
标题翻译：用于抑制正交多路信号峰值功率的方法，峰值功率抑制电路和发射机
公开(公告)号：US20090060073A1
公开(公告)日：2009-03-05
申请号：US12199595
申请日：2008-08-27
申请人： Takashi Yano , Shigenori Hayase , Masashi Naito
发明人： Takashi Yano , Shigenori Hayase , Masashi Naito
IPC分类号： H04J11/00
CPC分类号： H04L27/2614 , H04L27/2618 , H04L27/2623 , H04L27/2624
摘要： To suppress the peak of the orthogonal multiplex transmission signal which is small in deterioration of the quality of the reception signal by generating the cancellation waveform in synchronization with the timing of the symbol of the transmission signal. There is provided a peak suppressing method that suppresses peaks of an orthogonally multiplexed signal whose orthogonality is ensured in given time units, the method comprising: a first step of detecting the peaks of the orthogonally multiplexed signal; a second step of generating a peak cancellation waveform based on the detected peaks of the orthogonally multiplexed signal; and a third step of removing the peak of the orthogonally multiplexed signal from the orthogonally multiplexed signal using the generated peak cancellation waveform. The second step comprises generating the peak cancellation waveform in said time units of the orthogonally multiplexed signal.
摘要翻译：通过与发送信号的符号的定时同步地生成消除波形来抑制接收信号的质量恶化的正交多路传输信号的峰值。提供一种峰值抑制方法，其抑制以给定时间单位确保正交性的正交复用信号的峰值，该方法包括：检测正交多路复用信号的峰值的第一步骤; 基于检测到的正交多路复用信号的峰值产生峰值消除波形的第二步骤; 以及使用所生成的峰值抵消波形从正交多路复用信号中除去正交多路复用信号的峰值的第三步骤。第二步包括以正交复用信号的所述时间单位产生峰值消除波形。

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