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1. 发明授权

US08494073B2 Beamforming weight estimation using wideband multipath direction of arrival analysis 有权
标题翻译：使用宽带多径方向到达分析的波束成形权重估计
公开(公告)号：US08494073B2
公开(公告)日：2013-07-23
申请号：US12502607
申请日：2009-07-14
申请人： Genyuan Wang , Li Guo , Ahmadreza Hedayat , Hang Jin
发明人： Genyuan Wang , Li Guo , Ahmadreza Hedayat , Hang Jin
IPC分类号： H04L1/02 , H04M1/00
CPC分类号： H04B7/0617 , H04B7/0439 , H04B7/086
摘要： Techniques are provided for computing downlink beamforming weights based on the received data at a base station from a mobile station in a MIMO communication system. An uplink transmission is received at a plurality of antennas at a first communication device from a second communication device, where the uplink transmission comprises a plurality of uplink subbands. The uplink spatial signature is estimated for each of the plurality of uplink subbands. The uplink spatial signature is decomposed into a plurality of direction of arrival (DOA) components for each uplink subband using a transform. Data representing multiple propagation paths between the first communication device and the second communication device is computed for each DOA component. A plurality of direction of departure (DOD) components for each of a plurality of downlink subbands is computed based on the data representing the multiple propagation paths. A downlink spatial signature for each downlink subband from the plurality of DOD components is computed using an inverse of the transform. Downlink beamforming weights are computed for each of the plurality of downlink subbands based on the downlink spatial signature, where the downlink beamforming weights are for use by the first communication device when beamforming a downlink transmission via the plurality of antennas of the first communication device to the second communication device.
摘要翻译：提供了用于基于MIMO通信系统中的移动台在基站处接收到的数据来计算下行链路波束成形权重的技术。在来自第二通信设备的第一通信设备的多个天线处接收上行链路传输，其中上行链路传输包括多个上行链路子带。针对多个上行链路子带中的每一个估计上行链路空间特征。使用变换将上行链路空间特征分解为每个上行链路子带的多个到达方向（DOA）分量。针对每个DOA分量计算代表第一通信设备和第二通信设备之间的多个传播路径的数据。基于表示多个传播路径的数据来计算多个下行链路子带中的每一个的多个出发方向（DOD）分量。使用变换的倒数来计算来自多个DOD分量的每个下行链路子带的下行链路空间特征。基于下行链路空间特征，针对多个下行链路子带中的每一个计算下行链路波束形成权重，其中下行链路波束赋形权重由第一通信设备使用时，当波束成形通过第一通信设备的多个天线的下行链路传输到第二通信设备。

2. 发明申请

US20110013711A1 Beamforming Weight Estimation Using Wideband Multipath Direction of Arrival Analysis 有权
标题翻译：使用宽带多径方向到达分析的波束成形重量估计
公开(公告)号：US20110013711A1
公开(公告)日：2011-01-20
申请号：US12502607
申请日：2009-07-14
申请人： Genyuan Wang , Li Guo , Ahmadreza Hedayat , Hang Jin
发明人： Genyuan Wang , Li Guo , Ahmadreza Hedayat , Hang Jin
IPC分类号： H04L1/02 , H04M1/00
CPC分类号： H04B7/0617 , H04B7/0439 , H04B7/086
摘要： Techniques are provided for computing downlink beamforming weights based on the received data at a base station from a mobile station in a MIMO communication system. An uplink transmission is received at a plurality of antennas at a first communication device from a second communication device, where the uplink transmission comprises a plurality of uplink subbands. The uplink spatial signature is estimated for each of the plurality of uplink subbands. The uplink spatial signature is decomposed into a plurality of direction of arrival (DOA) components for each uplink subband using a transform. Data representing multiple propagation paths between the first communication device and the second communication device is computed for each DOA component. A plurality of direction of departure (DOD) components for each of a plurality of downlink subbands is computed based on the data representing the multiple propagation paths. A downlink spatial signature for each downlink subband from the plurality of DOD components is computed using an inverse of the transform. Downlink beamforming weights are computed for each of the plurality of downlink subbands based on the downlink spatial signature, where the downlink beamforming weights are for use by the first communication device when beamforming a downlink transmission via the plurality of antennas of the first communication device to the second communication device.
摘要翻译：提供了用于基于MIMO通信系统中的移动台在基站处接收到的数据来计算下行链路波束成形权重的技术。在来自第二通信设备的第一通信设备的多个天线处接收上行链路传输，其中上行链路传输包括多个上行链路子带。针对多个上行链路子带中的每一个估计上行链路空间特征。使用变换将上行链路空间特征分解为每个上行链路子带的多个到达方向（DOA）分量。针对每个DOA分量计算代表第一通信设备和第二通信设备之间的多个传播路径的数据。基于表示多个传播路径的数据来计算多个下行链路子带中的每一个的多个出发方向（DOD）分量。使用变换的倒数来计算来自多个DOD分量的每个下行链路子带的下行链路空间特征。基于下行链路空间特征，针对多个下行链路子带中的每一个计算下行链路波束形成权重，其中下行链路波束赋形权重由第一通信设备使用时，当波束成形通过第一通信设备的多个天线的下行链路传输到第二通信设备。

3. 发明申请

US20070268988A1 Method and system for optimal receive diversity combining 审中-公开
标题翻译：最优接收分集组合的方法和系统
公开(公告)号：US20070268988A1
公开(公告)日：2007-11-22
申请号：US11585581
申请日：2006-10-24
申请人： Ahmadreza Hedayat , Hang Jin , Li Guo , John Grabner
发明人： Ahmadreza Hedayat , Hang Jin , Li Guo , John Grabner
IPC分类号： H04L1/02 , H04B7/10
CPC分类号： H04B7/0851 , H04B7/0854 , H04L1/0045 , H04L1/0059 , H04L1/06 , H04L1/18 , H04L25/067
摘要： The present invention discloses a method and system for receive signal diversity combining that achieves the high effective SNR and high coding gain. The receive signal diversity combining method combines two or more received diversified signals of a predetermined original message and employs a Maximum Likelihood (ML) detection method to process the diversified signals to generate Log-Likelihood Ratio (LLR) data to exploit the available signal diversity and coding gain of each bit and to help the channel decoder to correctly determine the predetermined original message.
摘要翻译：本发明公开了一种实现高有效SNR和高编码增益的接收信号分集组合的方法和系统。接收信号分集组合方法组合了两个或多个接收到的预定原始消息的多样化信号，并采用最大似然（ML）检测方法来处理多样化信号以产生对数似然比（LLR）数据以利用可用信号分集，编码每个位的增益，并帮助信道解码器正确地确定预定的原始消息。

4. 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。

5. 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。

6. 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。

7. 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。

8. 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。

9. 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。

10. 发明申请

US20130003564A1 Link Adaptation for Retransmission Schemes 有权
标题翻译：链接适应重传方案
公开(公告)号：US20130003564A1
公开(公告)日：2013-01-03
申请号：US13616066
申请日：2012-09-14
申请人： Hang Jin , Li Guo , Hanqing Lou
发明人： Hang Jin , Li Guo , Hanqing Lou
IPC分类号： H04W24/00
CPC分类号： H04L1/0034 , H04L1/0035
摘要： Link adaptive retransmission techniques are provided for use in connection with wireless communications between a first wireless communication device and a second wireless communication device. The first wireless communication device generates M packet error information values for the transmit session of a packet based on whether an acknowledgment message or a non-acknowledgment message is received from the second wireless communication device for a transmission and for previously sent transmissions even if less than M transmissions are sent by the first wireless communication device to the second wireless communication device upon completion of the transmit session. The first wireless communication device computes a retransmission fading margin based on the M packet error information values, from which an effective carrier-to-interference-plus-noise ratio is derived for selection of a modulation scheme.
摘要翻译：链路自适应重传技术被提供用于结合第一无线通信设备和第二无线通信设备之间的无线通信。第一无线通信设备基于是否从第二无线通信设备接收到用于传输的确认消息或非确认消息，以及对于先前发送的传输，即使小于等于，也产生用于分组的发送会话的M个分组错误信息值在发送会话完成时，M个传输由第一无线通信设备发送到第二无线通信设备。第一无线通信设备基于M个分组误差信息值来计算重发衰落余量，从而从其导出用于选择调制方案的有效载波干扰加噪声比。

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