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1. 发明授权

US08306001B2 Dynamic downlink beamforming weight estimation for beamforming-space time code transmissions 有权
标题翻译：用于波束形成空间时间码传输的动态下行链路波束成形加权估计
公开(公告)号：US08306001B2
公开(公告)日：2012-11-06
申请号：US12687181
申请日：2010-01-14
申请人： Genyuan Wang , Li Guo , Hanqing Lou , Hang Jin
发明人： Genyuan Wang , Li Guo , Hanqing Lou , Hang Jin
IPC分类号： H04B7/216
CPC分类号： H04B7/0617 , H04B7/063 , H04W72/046
摘要： Techniques are provided to improve wireless beamformed communication between first and second wireless communication devices. At a plurality of antennas of the first wireless communication device (e.g., a base station) uplink transmissions sent from the second wireless communication device (e.g., a client or mobile device or station) are received. The first wireless communication device generates a downlink beamforming weight vector from received uplink transmissions, and computes a covariance matrix for received uplink transmissions. The first wireless communication device stores history information based on the covariance matrices for received uplink transmissions. The first wireless communication device computes first and second beamforming-space time code weight vectors based on the covariance matrix for an uplink transmission received in a current frame and the history information. The first wireless communication device uses the first and second beamforming-space time code weight vectors for a beamforming-space time code transmission technique to send a downlink transmission to the second wireless communication device.
摘要翻译：提供技术来改善第一和第二无线通信设备之间的无线波束形成的通信。在第一无线通信设备（例如，基站）的多个天线处，从第二无线通信设备（例如，客户机或移动设备或站）发送的上行链路传输被接收。第一无线通信设备从接收到的上行链路传输生成下行链路波束成形加权向量，并且计算用于接收的上行链路传输的协方差矩阵。第一无线通信设备基于接收到的上行链路传输的协方差矩阵存储历史信息。第一无线通信设备基于用于当前帧中接收的上行链路传输的协方差矩阵和历史信息来计算第一和第二波束形成空间时间码权重向量。第一无线通信设备使用波束形成空间时间码传输技术的第一和第二波束形成空间时间码权重向量来向第二无线通信设备发送下行链路传输。

2. 发明授权

US08280426B2 Adaptive power balancing and phase adjustment for MIMO-beamformed communication systems 有权
标题翻译：用于MIMO波束形成通信系统的自适应功率平衡和相位调整
公开(公告)号：US08280426B2
公开(公告)日：2012-10-02
申请号：US12608285
申请日：2009-10-29
申请人： Li Guo , Genyuan Wang , Hanqing Lou , Hang Jin
发明人： Li Guo , Genyuan Wang , Hanqing Lou , Hang Jin
IPC分类号： H04B7/005
CPC分类号： H04W52/42 , H04B7/0413 , H04B7/0617 , H04B7/086
摘要： Techniques are provided for improving performance of a multiple-input multiple-output (MIMO) wireless communication system. At a first wireless communication device (e.g., a base station) having a plurality of antennas, uplink transmissions are received from a second wireless communication device (e.g., a client device). The base station determines a measure of multipath conditions between it and the second wireless communication device based on the received uplink transmissions. The base station applies downlink beamforming weight vectors together with power balance and phase adjustment factors depending on the measure of multipath conditions to transmit multiple downlink data streams across the plurality of antennas simultaneously to the second wireless communication device.
摘要翻译：提供了用于改善多输入多输出（MIMO）无线通信系统的性能的技术。在具有多个天线的第一无线通信设备（例如，基站）处，从第二无线通信设备（例如，客户端设备）接收上行链路传输。基站基于所接收的上行链路传输来确定其与第二无线通信设备之间的多径条件的测量。基站根据多径条件的测量，将多个下行链路数据流同时发送到第二无线通信设备，基站根据功率平衡和相位调整因子来应用下行链路波束成形加权向量。

3. 发明申请

US20110105172A1 Adaptive Power Balancing and Phase Adjustment for MIMO-Beamformed Communication Systems 有权
标题翻译： MIMO-Beamformed通信系统的自适应功率平衡和相位调整
公开(公告)号：US20110105172A1
公开(公告)日：2011-05-05
申请号：US12608285
申请日：2009-10-29
申请人： Li Guo , Genyuan Wang , Hanqing Lou , Hang Jin
发明人： Li Guo , Genyuan Wang , Hanqing Lou , Hang Jin
IPC分类号： H04B7/005
CPC分类号： H04W52/42 , H04B7/0413 , H04B7/0617 , H04B7/086
摘要： Techniques are provided for improving performance of a multiple-input multiple-output (MIMO) wireless communication system. At a first wireless communication device (e.g., a base station) having a plurality of antennas, uplink transmissions are received from a second wireless communication device (e.g., a client device). The base station determines a measure of multipath conditions between it and the second wireless communication device based on the received uplink transmissions. The base station applies downlink beamforming weight vectors together with power balance and phase adjustment factors depending on the measure of multipath conditions to transmit multiple downlink data streams across the plurality of antennas simultaneously to the second wireless communication device.
摘要翻译：提供了用于改善多输入多输出（MIMO）无线通信系统的性能的技术。在具有多个天线的第一无线通信设备（例如，基站）处，从第二无线通信设备（例如，客户端设备）接收上行链路传输。基站基于所接收的上行链路传输来确定其与第二无线通信设备之间的多径条件的测量。基站根据多径条件的测量，将多个下行链路数据流同时发送到第二无线通信设备，基站根据功率平衡和相位调整因子来应用下行链路波束成形加权向量。

4. 发明申请

US20110124290A1 MIMO Mode Switch Management for Beamformed MIMO Systems 有权
标题翻译：用于波束形成MIMO系统的MIMO模式切换管理
公开(公告)号：US20110124290A1
公开(公告)日：2011-05-26
申请号：US12623932
申请日：2009-11-23
申请人： Hanqing Lou , Li Guo , Genyuan Wang , Hang Jin , Yanxin Na
发明人： Hanqing Lou , Li Guo , Genyuan Wang , Hang Jin , Yanxin Na
IPC分类号： H04B15/00
CPC分类号： H04B7/0689
摘要： Techniques are provided herein for improving multiple-input multiple-output (MIMO) wireless communications, and in particular to dynamically determining when to switch MIMO transmission modes on a communication link between two devices that are capable of supporting multiple MIMO transmission modes. A base station receives from a client device one or more signals containing information representing a first signal-to-noise ratio (SNR) measurement and a second SNR measurement made by the client device. The first SNR measurement is associated with a first MIMO transmission mode and the second SNR measurement is associated with a second MIMO transmission mode. The base station computes a MIMO channel quality indicator from the first SNR measurement and the second SNR measurement, and evaluates the MIMO channel quality indicator to determine whether to switch MIMO transmission modes for transmissions to the client device.
摘要翻译：本文提供了用于改进多输入多输出（MIMO）无线通信的技术，特别是动态地确定何时在能够支持多个MIMO传输模式的两个设备之间的通信链路上切换MIMO传输模式。基站从客户端设备接收包含表示第一信噪比（SNR）测量的信息的一个或多个信号和由客户端设备进行的第二SNR测量。第一SNR测量与第一MIMO传输模式相关联，并且第二SNR测量与第二MIMO传输模式相关联。基站从第一SNR测量和第二SNR测量计算MIMO信道质量指示符，并且评估MIMO信道质量指示符，以确定是否将用于传输的MIMO传输模式切换到客户端设备。

5. 发明授权

US08725084B2 MIMO mode switch management for beamformed MIMO systems 有权
标题翻译：用于波束形成MIMO系统的MIMO模式切换管理
公开(公告)号：US08725084B2
公开(公告)日：2014-05-13
申请号：US12623932
申请日：2009-11-23
申请人： Hanqing Lou , Li Guo , Genyuan Wang , Hang Jin , Yanxin Na
发明人： Hanqing Lou , Li Guo , Genyuan Wang , Hang Jin , Yanxin Na
IPC分类号： H04B7/00
CPC分类号： H04B7/0689
摘要： Techniques are provided herein for improving multiple-input multiple-output (MIMO) wireless communications, and in particular to dynamically determining when to switch MIMO transmission modes on a communication link between two devices that are capable of supporting multiple MIMO transmission modes. A base station receives from a client device one or more signals containing information representing a first signal-to-noise ratio (SNR) measurement and a second SNR measurement made by the client device. The first SNR measurement is associated with a first MIMO transmission mode and the second SNR measurement is associated with a second MIMO transmission mode. The base station computes a MIMO channel quality indicator from the first SNR measurement and the second SNR measurement, and evaluates the MIMO channel quality indicator to determine whether to switch MIMO transmission modes for transmissions to the client device.
摘要翻译：本文提供了用于改进多输入多输出（MIMO）无线通信的技术，特别是动态地确定何时在能够支持多个MIMO传输模式的两个设备之间的通信链路上切换MIMO传输模式。基站从客户端设备接收包含表示第一信噪比（SNR）测量的信息的一个或多个信号和由客户端设备进行的第二SNR测量。第一SNR测量与第一MIMO传输模式相关联，并且第二SNR测量与第二MIMO传输模式相关联。基站从第一SNR测量和第二SNR测量计算MIMO信道质量指示符，并且评估MIMO信道质量指示符，以确定是否将用于传输的MIMO传输模式切换到客户端设备。

6. 发明申请

US20110170521A1 Dynamic Downlink Beamforming Weight Estimation for Beamforming-Space Time Code Transmissions 有权
标题翻译：波束形成 - 时空码传输的动态下行波束成形重量估计
公开(公告)号：US20110170521A1
公开(公告)日：2011-07-14
申请号：US12687181
申请日：2010-01-14
申请人： Genyuan Wang , Li Guo , Hanqing Lou , Hang Jin
发明人： Genyuan Wang , Li Guo , Hanqing Lou , Hang Jin
IPC分类号： H04J3/00
CPC分类号： H04B7/0617 , H04B7/063 , H04W72/046
摘要： Techniques are provided to improve wireless beamformed communication between first and second wireless communication devices. At a plurality of antennas of the first wireless communication device (e.g., a base station) uplink transmissions sent from the second wireless communication device (e.g., a client or mobile device or station) are received. The first wireless communication device generates a downlink beamforming weight vector from received uplink transmissions, and computes a covariance matrix for received uplink transmissions. The first wireless communication device stores history information based on the covariance matrices for received uplink transmissions. The first wireless communication device computes first and second beamforming-space time code weight vectors based on the covariance matrix for an uplink transmission received in a current frame and the history information. The first wireless communication device uses the first and second beamforming-space time code weight vectors for a beamforming-space time code transmission technique to send a downlink transmission to the second wireless communication device.
摘要翻译：提供技术来改善第一和第二无线通信设备之间的无线波束形成的通信。在第一无线通信设备（例如，基站）的多个天线处，从第二无线通信设备（例如，客户机或移动设备或站）发送的上行链路传输被接收。第一无线通信设备从接收到的上行链路传输生成下行链路波束成形加权向量，并且计算用于接收的上行链路传输的协方差矩阵。第一无线通信设备基于接收到的上行链路传输的协方差矩阵存储历史信息。第一无线通信设备基于用于当前帧中接收的上行链路传输的协方差矩阵和历史信息来计算第一和第二波束形成空间时间码权重向量。第一无线通信设备使用波束形成空间时间码传输技术的第一和第二波束形成空间时间码权重向量来向第二无线通信设备发送下行链路传输。

7. 发明授权

US08149942B1 Method and system for selecting a transmission scheme in a multiple-input-multiple-output wireless communications system 有权
标题翻译：用于在多输入多输出无线通信系统中选择传输方案的方法和系统
公开(公告)号：US08149942B1
公开(公告)日：2012-04-03
申请号：US12026928
申请日：2008-02-06
申请人： Genyuan Wang , Ahmadreza Hedayat , Hanqing Lou , Hang Jin
发明人： Genyuan Wang , Ahmadreza Hedayat , Hanqing Lou , Hang Jin
IPC分类号： H04B7/02
CPC分类号： H04B7/0617 , H04B7/0626
摘要： The present invention discloses a method for selecting a transmission scheme in a multiple-input-multiple-output (MIMO) wireless communications system. The method comprises receiving a downlink request to transmit a data stream to a wireless station, checking the availability of channel state information (CSI) associated with the wireless station, determining the validity characteristic of beamforming weighting vectors associated with the wireless station, selecting a transmission scheme from a plurality of predetermined transmission schemes based on the availability of the CSI and the validity characteristic of the beamforming weighting vectors.
摘要翻译：本发明公开了一种在多输入多输出（MIMO）无线通信系统中选择传输方案的方法。该方法包括接收向无线站发送数据流的下行链路请求，检查与无线站相关联的信道状态信息（CSI）的可用性，确定与无线站相关联的波束成形加权向量的有效性特性，选择传输基于CSI的可用性和波束成形加权矢量的有效特性，从多个预定传输方案中获取。

8. 发明授权

US08116698B2 Generalized MIMO-beamforming weight estimation 有权
标题翻译：广义MIMO波束成形权重估计
公开(公告)号：US08116698B2
公开(公告)日：2012-02-14
申请号：US12181383
申请日：2008-07-29
申请人： Ahmadreza Hedayat , Genyuan Wang , Hang Jin , Hanqing Lou
发明人： Ahmadreza Hedayat , Genyuan Wang , Hang Jin , Hanqing Lou
IPC分类号： H03C7/02 , H04M1/00 , H04B1/00 , H04B15/00
CPC分类号： H04B7/0617 , H04B7/0404 , H04B7/0413 , H04B7/0434 , H04B7/0851
摘要： Techniques are provided to enable wireless communication between first and second wireless communication devices each having a plurality of antennas, where the second device sends the transmissions via less than all of its plurality of antennas. Each transmission may comprise a plurality of time-frequency instances. At the first communication device, data is derived representing parameters of a communication channel between the plurality of antennas of the first device and all of the plurality of antennas of the second device from the transmissions received at the plurality of antennas of the first device. Beamforming weights for transmitting one or more signal streams via the plurality of antennas of the first device to the plurality of antennas of the second device are computed based on the data representing parameters of the communication channel between the plurality of antennas of the first device and the plurality of antennas of the second device. The beamforming weights are applied to the one or more signal streams to be transmitted via the plurality of antennas of the first device to the plurality of antennas of the second device.
摘要翻译：提供技术来实现每个具有多个天线的第一和第二无线通信设备之间的无线通信，其中第二设备经由小于其全部多个天线发送传输。每个传输可以包括多个时频实例。在第一通信设备处，从第一设备的多个天线处接收到的传输中导出表示第一设备的多个天线与第二设备的所有多个天线之间的通信信道的参数的数据。基于表示第一设备的多个天线和第一设备的天线之间的通信信道的参数的数据来计算用于经由第一设备的多个天线将一个或多个信号流发送到第二设备的多个天线的波束成形权重第二装置的多个天线。波束成形权重被施加到要经由第一设备的多个天线发送到第二设备的多个天线的一个或多个信号流。

9. 发明授权

US08068552B2 Method and system for achieving spatial diversity of a wireless communications network 有权
标题翻译：实现无线通信网络空间分集的方法和系统
公开(公告)号：US08068552B2
公开(公告)日：2011-11-29
申请号：US12035033
申请日：2008-02-21
申请人： Genyuan Wang , Hang Jin , Hanqing Lou , Ahmadreza Hedayat
发明人： Genyuan Wang , Hang Jin , Hanqing Lou , Ahmadreza Hedayat
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0691 , H04B7/0617 , H04B7/0671 , H04L5/0023 , H04W52/42
摘要： A method and system are provided for achieving spatial diversity of a wireless communications network. The method comprises arranging antennas on a transmitting wireless station into a plurality of antenna subgroups, wherein each of the antenna subgroups forms a virtual antenna, creating a plurality of beamformed MIMO channels using the plurality of virtual antennas, wherein each of the beamformed MIMO channel comprises a plurality of sub-carriers and corresponds to a virtual antenna, dividing sub-carriers in each of the plurality of beamformed MIMO channels into at least a first and second cluster, distributing a first amount of transmitting power to the first cluster and a second amount of transmitting power to the second cluster, wherein the first amount of transmitting power is substantially larger than the second amount of transmitting power.
摘要翻译：提供了一种用于实现无线通信网络的空间分集的方法和系统。该方法包括将发射无线站上的天线布置到多个天线子组中，其中每个天线子组形成虚拟天线，使用多个虚拟天线创建多个波束形成的MIMO信道，其中每个波束形成的MIMO信道包括多个子载波，并且对应于虚拟天线，将所述多个波束形成的MIMO信道中的每一个中的子载波划分为至少第一和第二簇，将第一发射功率量分配给所述第一簇，并将第二量向所述第二群发射功率，其中所述第一发射功率量大大地大于所述第二发射功率量。

10. 发明申请

US20080205539A1 Method and System for Achieving Spatial Diversity of a Wireless Communications Network 有权
标题翻译：实现无线通信网络空间分集的方法与系统
公开(公告)号：US20080205539A1
公开(公告)日：2008-08-28
申请号：US12035033
申请日：2008-02-21
申请人： Genyuan Wang , Hang Jin , Hanqing Lou , Ahmadreza Hedayat
发明人： Genyuan Wang , Hang Jin , Hanqing Lou , Ahmadreza Hedayat
IPC分类号： H04B7/02
CPC分类号： H04B7/0691 , H04B7/0617 , H04B7/0671 , H04L5/0023 , H04W52/42
摘要： A method and system are provided for achieving spatial diversity of a wireless communications network. The method comprises arranging antennas on a transmitting wireless station into a plurality of antenna subgroups, wherein each of the antenna subgroups forms a virtual antenna, creating a plurality of beamformed MIMO channels using the plurality of virtual antennas, wherein each of the beamformed MIMO channel comprises a plurality of sub-carriers and corresponds to a virtual antenna, dividing sub-carriers in each of the plurality of beamformed MIMO channels into at least a first and second cluster, distributing a first amount of transmitting power to the first cluster and a second amount of transmitting power to the second cluster, wherein the first amount of transmitting power is substantially larger than the second amount of transmitting power.
摘要翻译：提供了一种用于实现无线通信网络的空间分集的方法和系统。该方法包括将发射无线站上的天线布置到多个天线子组中，其中每个天线子组形成虚拟天线，使用多个虚拟天线创建多个波束形成的MIMO信道，其中每个波束形成的MIMO信道包括多个子载波，并且对应于虚拟天线，将所述多个波束形成的MIMO信道中的每一个中的子载波划分为至少第一和第二簇，将第一发射功率量分配给所述第一簇，并将第二量向所述第二群发射功率，其中所述第一发射功率量大大地大于所述第二发射功率量。

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