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1. 发明授权

US08718172B2 Two stage precoding for multi-user MIMO systems 有权
标题翻译：用于多用户MIMO系统的两级预编码
公开(公告)号：US08718172B2
公开(公告)日：2014-05-06
申请号：US13459328
申请日：2012-04-30
申请人： Brian Donald Hart , Genyuan Wang , Ahmadreza Hedayat , Paul J. Stager
发明人： Brian Donald Hart , Genyuan Wang , Ahmadreza Hedayat , Paul J. Stager
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0456 , H04B7/0452 , H04L25/03898
摘要： Techniques are provided for generating a precoding matrix for a multi-user multiple-input multiple-output wireless communication system. A first wireless communication device is provided that has a plurality of antennas from which multiple spatial streams are to be simultaneously transmitted to a plurality of second wireless communication devices. A channel matrix is computed between the antennas of the first device and the antennas of each of the second wireless communication devices to produce a plurality of client-specific channel matrices. A singular value decomposition is computed of each client-specific channel matrices. A number of strongest singular values and their corresponding singular vectors are stored from the singular decomposition of each of the client-specific channel matrices. From each client-specific channel matrix, a principal component-like single-client channel matrix is computed. The principal component-like single-client channel matrices are combined to form a principal component-like multi-user channel matrix, from which the precoding matrix is computed.
摘要翻译：提供了用于为多用户多输入多输出无线通信系统生成预编码矩阵的技术。提供了具有多个天线的第一无线通信设备，多个空间流将从该多个天线同时发送到多个第二无线通信设备。在第一设备的天线和每个第二无线通信设备的天线之间计算信道矩阵，以产生多个客户专用信道矩阵。对每个客户特定的信道矩阵计算奇异值分解。从每个客户特定信道矩阵的奇异分解中存储多个最强奇异值及其相应的奇异向量。从每个客户端特定的信道矩阵，计算一个主要的组件类的单客户端信道矩阵。主要的组件类单客户机信道矩阵被组合以形成主要的组件类多用户信道矩阵，从中计算预编码矩阵。

2. 发明申请

US20140052508A1 ROGUE SERVICE ADVERTISEMENT DETECTION 审中-公开
标题翻译： ROGUE服务广告检测
公开(公告)号：US20140052508A1
公开(公告)日：2014-02-20
申请号：US13585226
申请日：2012-08-14
申请人： Santosh PANDEY , Brian Donald Hart , Andrew Myles
发明人： Santosh PANDEY , Brian Donald Hart , Andrew Myles
IPC分类号： G06Q30/02
CPC分类号： G06Q30/02 , H04W12/12
摘要： In an example embodiment, unauthorized wireless services and advertisements can be detected by access points via active or passive scanning. Unauthorized, or rogue, service advertisements are reported to the venue owner along with contextual information for further mitigation.
摘要翻译：在示例实施例中，可以通过主动或被动扫描的接入点来检测未授权的无线服务和广告。未经授权或流氓的服务广告将与场景所有者一起报告，以便进一步减轻风险。

3. 发明申请

US20130287131A1 Two Stage Precoding for Multi-User MIMO Systems 有权
标题翻译：用于多用户MIMO系统的两级预编码
公开(公告)号：US20130287131A1
公开(公告)日：2013-10-31
申请号：US13459328
申请日：2012-04-30
申请人： Brian Donald Hart , Genyuan Wang , Ahmadreza Hedayat , Paul J. Stager
发明人： Brian Donald Hart , Genyuan Wang , Ahmadreza Hedayat , Paul J. Stager
IPC分类号： H04B7/04
CPC分类号： H04B7/0456 , H04B7/0452 , H04L25/03898
摘要： Techniques are provided for generating a precoding matrix for a multi-user multiple-input multiple-output wireless communication system. A first wireless communication device is provided that has a plurality of antennas from which multiple spatial streams are to be simultaneously transmitted to a plurality of second wireless communication devices. A channel matrix is computed between the antennas of the first device and the antennas of each of the second wireless communication devices to produce a plurality of client-specific channel matrices. A singular value decomposition is computed of each client-specific channel matrices. A number of strongest singular values and their corresponding singular vectors are stored from the singular decomposition of each of the client-specific channel matrices. From each client-specific channel matrix, a principal component-like single-client channel matrix is computed. The principal component-like single-client channel matrices are combined to form a principal component-like multi-user channel matrix, from which the precoding matrix is computed.
摘要翻译：提供了用于为多用户多输入多输出无线通信系统生成预编码矩阵的技术。提供了具有多个天线的第一无线通信设备，多个空间流将从该多个天线同时发送到多个第二无线通信设备。在第一设备的天线和每个第二无线通信设备的天线之间计算信道矩阵，以产生多个客户专用信道矩阵。对每个客户特定的信道矩阵计算奇异值分解。从每个客户特定信道矩阵的奇异分解中存储多个最强奇异值及其相应的奇异向量。从每个客户端特定的信道矩阵，计算一个主要的组件类的单客户端信道矩阵。主要的组件类单客户机信道矩阵被组合以形成主要的组件类多用户信道矩阵，从中计算预编码矩阵。

4. 发明授权

US08559323B2 Downlink OFDMA for service sets with mixed client types 有权
标题翻译：用于具有混合客户端类型的服务集的下行OFDMA
公开(公告)号：US08559323B2
公开(公告)日：2013-10-15
申请号：US12819327
申请日：2010-06-21
申请人： Brian Donald Hart
发明人： Brian Donald Hart
IPC分类号： G01R31/08
CPC分类号： H04W72/048 , H04L5/0007 , H04L5/001 , H04L5/0023 , H04L5/0028 , H04L5/0037 , H04L5/0055 , H04L5/0064 , H04L5/0087 , H04L5/0094 , H04L69/22 , H04L69/323 , H04W24/04 , H04W72/0453 , H04W72/1289 , H04W84/12 , H04W88/08
摘要： Techniques are provided herein to allow a wireless network access point (AP) to more fully use its bandwidth in order to leverage the different bandwidth capabilities of different types of wireless client devices that the AP serves. The AP generates control parameters for usage of a plurality of channels in a bandwidth during a downlink transmission interval. The control parameters comprise information indicating channel assignments that result in multiple downlink transmissions that at least partially overlap in time to different wireless client devices according to their respective bandwidth capabilities. The AP transmits the control parameters in a control frame in advance of the downlink transmission interval on each of the plurality of channels in the bandwidth.
摘要翻译：本文提供了技术以允许无线网络接入点（AP）更充分地使用其带宽，以便利用AP所服务的不同类型的无线客户端设备的不同带宽能力。 AP在下行链路传输间隔期间产生用于在带宽中使用多个信道的控制参数。控制参数包括指示根据各自的带宽能力导致至少部分地与不同无线客户端设备重叠的多个下行链路传输的信道分配的信息。 AP在带宽中的多个信道中的每一个上的下行链路传输间隔之前的控制帧中发送控制参数。

5. 发明授权

US08335173B2 Inserting time of departure information in frames to support multi-channel location techniques 有权
标题翻译：以帧格式插入出发时间信息，以支持多频道定位技术
公开(公告)号：US08335173B2
公开(公告)日：2012-12-18
申请号：US12168250
申请日：2008-07-07
申请人： Brian Donald Hart , Paul J. Stager , Allan Thomson
发明人： Brian Donald Hart , Paul J. Stager , Allan Thomson
IPC分类号： H04B7/00
CPC分类号： G01S5/0226
摘要： A device whose location is to be determined (target device) generates a plurality of frames (messages) and time of departure (TOD) timestamp information indicating when the target device transmits the plurality of frames in a sequence or burst. The target device transmits the plurality of frames and the TOD information, wherein the plurality of frames are transmitted such that at least two of the frames are on different radio frequency (RF) channels. Within a sequence or burst (or across multiple sequences or bursts), multiple widely spaced transmissions on the same channel are included to allow for estimation of the crystal frequency offset of the transmitting device. The TOD information included in the transmitted packets allows devices that receive the packets not to change their channels of operation solely for the purpose of receiving packets from the device to be located.
摘要翻译：要确定其位置的设备（目标设备）产生指示目标设备何时以序列或突发方式发送多个帧的多个帧（消息）和出发时间（TOD）时间戳信息。目标设备发送多个帧和TOD信息，其中发送多个帧，使得至少两个帧在不同的射频（RF）信道上。在序列或突发（或跨多个序列或突发）中，包括相同信道上的多个宽间隔的传输以允许估计发射设备的晶体频率偏移。包含在所发送的分组中的TOD信息允许接收分组的设备不改变其操作信道，仅用于从要被定位的设备接收分组。

6. 发明申请

US20120314583A1 COEXISTENCE MECHANISM FOR MULTIPLE CHANNELS 有权
标题翻译：多通道的共同机制
公开(公告)号：US20120314583A1
公开(公告)日：2012-12-13
申请号：US13158945
申请日：2011-06-13
申请人： Brian Donald HART , Raghuram Rangarajan , Ahmadreza Hedayat
发明人： Brian Donald HART , Raghuram Rangarajan , Ahmadreza Hedayat
IPC分类号： H04W24/00
CPC分类号： H04W72/04 , H04L1/00 , H04L43/00 , H04W36/18 , H04W72/0406 , H04W74/0816
摘要： In accordance with an example embodiment, there is disclosed herein a coexistence mechanism for multiple channels. A plurality of channels are monitored to determine which channels are available for communications. Upon receiving a request to establish communications on a channel set within the plurality of channels, a response is sent to the request on at least one in the channel set. The response comprises data representative of which channels from the channel set are available for communications. Optionally, the response may include data indicating how long the unavailable channels will be occupied.
摘要翻译：根据示例性实施例，这里公开了一种用于多个信道的共存机制。监视多个信道以确定哪些信道可用于通信。在接收到在多个信道中设置的信道上建立通信的请求时，在信道集中的至少一个上向该请求发送响应。响应包括表示来自信道集的哪些信道可用于通信的数据。可选地，响应可以包括指示不可用信道将被占用多长时间的数据。

7. 发明申请

US20120280714A1 CLOCK SYNCHRONIZATION 审中-公开
标题翻译：时钟同步
公开(公告)号：US20120280714A1
公开(公告)日：2012-11-08
申请号：US13552093
申请日：2012-07-18
申请人： Matthew Aaron SILVERMAN , Paul Jeffrey Stager , Brian Donald Hart
发明人： Matthew Aaron SILVERMAN , Paul Jeffrey Stager , Brian Donald Hart
IPC分类号： H03K19/096
CPC分类号： H04J3/0667 , G01S5/06 , H04W56/0075
摘要： In an example embodiment, a method for synchronizing clocks between a plurality of clocked devices where one of the plurality of clocked devices is not directly synchronized with another of the plurality of clocked devices. Clock offset and a clock drift between a first clock associated with a first device and a second clock associated with a second is directly determined based on signals exchanged between the first and second devices. Clock offset and clock drift between the second clock and a third clock associated with a third device is directly determined based on signals exchanged between the second and third devices. A clock offset and clock drift between the first clock and third clock is determined based on a difference between the clock offset and drift between the first and second clocks and the clock offset and drift between the second and third clocks.
摘要翻译：在示例实施例中，一种用于在多个时钟控制的设备之间同步时钟的方法，其中多个时钟控制的设备之一不直接与多个时钟设备中的另一个同步。基于在第一和第二设备之间交换的信号直接确定与第一设备相关联的第一时钟和与第二设备相关联的第二时钟之间的时钟偏移和时钟漂移。第二时钟与与第三设备相关联的第三时钟之间的时钟偏移和时钟漂移基于在第二和第三设备之间交换的信号直接确定。第一时钟和第三时钟之间的时钟偏移和时钟漂移基于第一和第二时钟之间的时钟偏移和漂移之间的差异以及第二和第三时钟之间的时钟偏移和漂移来确定。

8. 发明授权

US07983667B2 Radio frequency coverage map generation in wireless networks 有权
标题翻译：无线网络中的射频覆盖图生成
公开(公告)号：US07983667B2
公开(公告)日：2011-07-19
申请号：US11543747
申请日：2006-10-05
申请人： Brian Donald Hart , Robert J. Friday , Milind Paranjpe
发明人： Brian Donald Hart , Robert J. Friday , Milind Paranjpe
IPC分类号： H04W24/00 , H04W40/00
CPC分类号： H04W16/20 , H04B17/318 , H04B17/3913
摘要： In one embodiment, a method for generating a radio-frequency coverage map. The method includes receiving coverage map data comprising a plurality of locations within a region, and an identification of a location in the plurality of locations corresponding to a radio transceiver, wherein the locations within the region are represented by at least corresponding x- and y-terms of a Cartesian coordinate system. The method further includes receiving calibration data comprising a plurality of observed signal strength values at corresponding ones of the plurality of locations, converting the x- and y-terms of the locations of the coverage map data to corresponding first and second warped coordinate terms of a warped coordinate system, and computing, using linear interpolation and the first and second warped coordinate terms, predicted received signal strength values at one or more locations in the coverage map based on the calibration data.
摘要翻译：在一个实施例中，一种用于产生射频覆盖图的方法。该方法包括接收包括区域内的多个位置的覆盖地图数据以及对应于无线电收发信机的多个位置中的位置的标识，其中该区域内的位置由至少相应的x和y- 笛卡尔坐标系的项。该方法还包括接收包括在多个位置中的相应位置处的多个观测信号强度值的校准数据，将覆盖地图数据的位置的x和y项转换成相应的第一和第二扭曲坐标项弯曲坐标系，以及使用线性内插和第一和第二翘曲坐标项的计算，基于校准数据在覆盖图中的一个或多个位置处预测接收信号强度值。

9. 发明授权

US07948991B1 Broadcast and multicast transmissions with acknowledgement scheduling 有权
标题翻译：具有确认调度的广播和多播传输
公开(公告)号：US07948991B1
公开(公告)日：2011-05-24
申请号：US12283831
申请日：2008-09-16
申请人： Brian Donald Hart , Lu Qian
发明人： Brian Donald Hart , Lu Qian
IPC分类号： H04L12/28 , G06F9/46
CPC分类号： H04L12/1868 , H04L1/1854 , H04L1/1861 , H04L2001/0093 , H04W72/1289
摘要： In one embodiment, a method includes scheduling acknowledgements from a plurality of receivers in a wireless network, transmitting an acknowledgement schedule to the receivers, broadcasting or multicasting data to the receivers, processing acknowledgements received from receivers, and retransmitting at least a portion of the data to one or more of the receivers if an acknowledgement is not received from the one or more receivers. An apparatus for broadcasting or multicasting data in a wireless network is also disclosed.
摘要翻译：在一个实施例中，一种方法包括从无线网络中的多个接收机调度确认，向接收机发送确认调度，向接收机广播或多播数据，处理从接收机接收的确认，以及重发数据的至少一部分如果没有从一个或多个接收器接收到确认，则发送给一个或多个接收器。还公开了一种用于在无线网络中广播或组播数据的装置。

10. 发明申请

US20090257426A1 INSERTING TIME OF DEPARTURE INFORMATION IN FRAMES TO SUPPORT MULTI-CHANNEL LOCATION TECHNIQUES 有权
标题翻译：支持多通道位置技术的框架中的离开时间的插入时间
公开(公告)号：US20090257426A1
公开(公告)日：2009-10-15
申请号：US12168250
申请日：2008-07-07
申请人： Brian Donald Hart , Paul J. Stager , Allan Thomson
发明人： Brian Donald Hart , Paul J. Stager , Allan Thomson
IPC分类号： H04J3/06
CPC分类号： G01S5/0226
摘要： A device whose location is to be determined (target device) generates a plurality of frames (messages) and time of departure (TOD) timestamp information indicating when the target device transmits the plurality of frames in a sequence or burst. The target device transmits the plurality of frames and the TOD information, wherein the plurality of frames are transmitted such that at least two of the frames are on different radio frequency (RF) channels. Within a sequence or burst (or across multiple sequences or bursts), multiple widely spaced transmissions on the same channel are included to allow for estimation of the crystal frequency offset of the transmitting device. The TOD information included in the transmitted packets allows devices that receive the packets not to change their channels of operation solely for the purpose of receiving packets from the device to be located.
摘要翻译：要确定其位置的设备（目标设备）产生指示目标设备何时以序列或突发方式发送多个帧的多个帧（消息）和出发时间（TOD）时间戳信息。目标设备发送多个帧和TOD信息，其中发送多个帧，使得至少两个帧在不同的射频（RF）信道上。在序列或突发（或跨多个序列或突发）中，包括相同信道上的多个宽间隔的传输以允许估计发射设备的晶体频率偏移。包含在所发送的分组中的TOD信息允许接收分组的设备不改变其操作信道，仅用于从要被定位的设备接收分组。

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