专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US08284752B2 Method, apparatus, and system for medium access control 有权
标题翻译：用于媒体访问控制的方法，装置和系统
公开(公告)号：US08284752B2
公开(公告)日：2012-10-09
申请号：US10964332
申请日：2004-10-13
申请人： John W. Ketchum , Mark S. Wallace , Jay Rodney Walton , Sanjiv Nanda
发明人： John W. Ketchum , Mark S. Wallace , Jay Rodney Walton , Sanjiv Nanda
IPC分类号： H04J3/24 , H04J3/16
CPC分类号： H04L29/06 , H04L69/32 , H04L69/324 , H04L69/325
摘要： Embodiments addressing MAC processing for efficient use of high throughput systems are disclosed. In one aspect, an apparatus comprises a first layer for receiving one or more packets from one or more data flows and for generating one or more first layer Protocol Data Units (PDUs) from the one or more packets. In another aspect, a second layer is deployed for generating one or more MAC frames based on the one or more MAC layer PDUs. In another aspect, a MAC frame is deployed for transmitting one or more MAC layer PDUs. The MAC frame may comprise a control channel for transmitting one or more allocations. The MAC frame may comprise one or more traffic segments in accordance with allocations.
摘要翻译：公开了解决用于高吞吐量系统的有效使用的MAC处理的实施例。在一个方面，一种装置包括用于从一个或多个数据流接收一个或多个分组并用于从所述一个或多个分组生成一个或多个第一层协议数据单元（PDU）的第一层。在另一方面，第二层被部署用于基于一个或多个MAC层PDU生成一个或多个MAC帧。在另一方面，部署MAC帧以发送一个或多个MAC层PDU。 MAC帧可以包括用于发送一个或多个分配的控制信道。 MAC帧可以包括根据分配的一个或多个业务段。

22. 发明授权

US08909174B2 Continuous beamforming for a MIMO-OFDM system 有权
标题翻译：用于MIMO-OFDM系统的连续波束成形
公开(公告)号：US08909174B2
公开(公告)日：2014-12-09
申请号：US12533765
申请日：2009-07-31
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04B7/02 , H04B7/06 , H04B7/04
CPC分类号： H04B7/0617 , H04B7/0408 , H04B7/0417 , H04B7/0626 , H04B7/0671
摘要： A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols may be sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response matrix for that subband and perform receiver spatial processing for the subband with the spatial filter matrix.
摘要翻译：发送实体对具有本征模式矩阵，导向矩阵或单位矩阵的每个子带的数据符号执行空间处理，以获得子带的空间处理符号。数据符号可以在具有本征模式矩阵的正交空间信道上，在具有导引矩阵的不同空间信道上，或者从具有单位矩阵的不同发射天线发送。在从多个发射天线的发射之前，发射实体在频域或时域中进一步对空间处理的符号执行波束成形。接收实体执行补充处理以恢复由发送实体发送的数据符号。接收实体可以基于该子带的MIMO信道响应矩阵为每个子带导出空间滤波器矩阵，并且对于具有空间滤波器矩阵的子带执行接收机空间处理。

23. 发明授权

US08520498B2 Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system 失效
标题翻译：基于OFDM的多天线通信系统的发射分集和空间扩展
公开(公告)号：US08520498B2
公开(公告)日：2013-08-27
申请号：US13461707
申请日：2012-05-01
申请人： Jay Rodney Walton , John Wendell Ketchum , Mark S. Wallace , Steven J. Howard , Sanjiv Nanda
发明人： Jay Rodney Walton , John Wendell Ketchum , Mark S. Wallace , Steven J. Howard , Sanjiv Nanda
IPC分类号： H04J11/10
CPC分类号： H04B7/0615 , H04B7/0413 , H04L27/2602
摘要： A multi-antenna transmitting entity transmits data to a single- or multi-antenna receiving entity using (1) a steered mode to direct the data transmission toward the receiving entity or (2) a pseudo-random transmit steering (PRTS) mode to randomize the effective channels observed by the data transmission across the subbands. For transmit diversity, the transmitting entity uses different pseudo-random steering vectors across the subbands but the same steering vector across a packet for each subband. The receiving entity does not need to have knowledge of the pseudo-random steering vectors or perform any special processing. For spatial spreading, the transmitting entity uses different pseudo-random steering vectors across the subbands and different steering vectors across the packet for each subband. Only the transmitting and receiving entities know the steering vectors used for data transmission. Other aspects, embodiments, and features are also claimed and disclosed.
摘要翻译：多天线发射实体使用（1）向接收实体指导数据传输的导向模式或（2）伪随机发射转向（PRTS）模式来将数据发送到单天线或多天线接收实体，以随机化通过子带上的数据传输观察到的有效信道。对于发射分集，发射实体在子带上使用不同的伪随机导引向量，但是在每个子带的分组上使用相同的导向向量。接收实体不需要具有伪随机导引向量的知识或执行任何特殊处理。对于空间扩展，发射实体在子带上使用不同的伪随机导引向量，并且跨每个子带的分组使用不同的导向矢量。只有发送和接收实体知道用于数据传输的导向向量。还要求和公开其他方面，实施例和特征。

24. 发明授权

US07110463B2 Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system 有权
标题翻译：用于在MIMO通信系统中用于指导发射分集的空间滤波器矩阵的有效计算
公开(公告)号：US07110463B2
公开(公告)日：2006-09-19
申请号：US10882491
申请日：2004-06-30
申请人： Mark S. Wallace , Jay Rodney Walton , Steven J. Howard
发明人： Mark S. Wallace , Jay Rodney Walton , Steven J. Howard
IPC分类号： H04B7/02
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0697 , H04B7/0854
摘要： Techniques for efficiently computing spatial filter matrices are described. The channel response matrices for a MIMO channel may be highly correlated if the channel is relatively static over a range of transmission spans. In this case, an initial spatial filter matrix may be derived based on one channel response matrix, and a spatial filter matrix for each transmission span may be computed based on the initial spatial filter matrix and a steering matrix used for that transmission span. The channel response matrices may be partially correlated if the MIMO channel is not static but does not change abruptly. In this case, a spatial filter matrix may be derived for one transmission span l and used to derive an initial spatial filter matrix for another transmission span m. A spatial filter matrix for transmission span m may be computed based on the initial spatial filter matrix, e.g., using an iterative procedure.
摘要翻译：描述了有效计算空间滤波器矩阵的技术。如果信道在传输跨度的范围内是相对静态的，则用于MIMO信道的信道响应矩阵可以是高度相关的。在这种情况下，可以基于一个信道响应矩阵导出初始空间滤波器矩阵，并且可以基于初始空间滤波器矩阵和用于该传输跨度的导引矩阵来计算每个传输跨度的空间滤波器矩阵。如果MIMO信道不是静态的但是不突然改变，则信道响应矩阵可以是部分相关的。在这种情况下，可以为一个传输跨度l导出空间滤波器矩阵，并且用于导出用于另一个传输跨度m的初始空间滤波器矩阵。可以基于初始空间滤波器矩阵来计算用于传输跨度m的空间滤波器矩阵，例如使用迭代过程。

25. 发明授权

US08767701B2 Unified MIMO transmission and reception 有权
标题翻译：统一的MIMO传输和接收
公开(公告)号：US08767701B2
公开(公告)日：2014-07-01
申请号：US12534137
申请日：2009-08-02
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04B7/02 , H04B7/04 , H04B7/12
CPC分类号： H04B7/0413 , H04B7/0417 , H04B7/0421 , H04B7/0617 , H04L1/0026
摘要： A “unified” MIMO system that supports multiple operating modes for efficient data transmission is described. Each operating mode is associated with different spatial processing at a transmitting entity. For example, four operating modes may be defined for (1) full-CSI or partial-CSI transmission and (2) with or without steering transmit diversity (STD). An appropriate operating mode may be selected for use based on various factors (e.g., availability of a good channel estimate). With steering transmit diversity, data is spatially spread and transmitted on multiple spatial channels, and a single rate may then be used for all spatial channels used for data transmission. A receiving entity may utilize a minimum mean square error (MMSE) technique for all operating modes. The receiving entity may derive a spatial filter matrix and perform receiver spatial processing in the same manner for all operating modes, albeit with different effective channel response matrices.
摘要翻译：描述了支持多种操作模式以实现有效数据传输的“统一”MIMO系统。每个操作模式与发送实体处的不同空间处理相关联。例如，可以为（1）全CSI或部分CSI传输定义四种操作模式，以及（2）具有或不具有导向发射分集（STD）的操作模式。可以基于各种因素（例如，良好信道估计的可用性）来选择适当的操作模式来使用。利用转向发射分集，数据在空间上扩展并在多个空间信道上传输，然后可以将单个速率用于用于数据传输的所有空间信道。接收实体可以针对所有操作模式使用最小均方误差（MMSE）技术。接收实体可以导出空间滤波器矩阵并且以相同的方式对所有操作模式执行接收机空间处理，尽管具有不同的有效信道响应矩阵。

26. 发明授权

US07822069B2 Phase correction for OFDM and MIMO transmissions 有权
标题翻译： OFDM和MIMO传输的相位校正
公开(公告)号：US07822069B2
公开(公告)日：2010-10-26
申请号：US11751471
申请日：2007-05-21
申请人： Irina Medvedev , Jay Rodney Walton , Mark S. Wallace , Steven J. Howard
发明人： Irina Medvedev , Jay Rodney Walton , Mark S. Wallace , Steven J. Howard
IPC分类号： H04B3/10 , H04W4/00
CPC分类号： H04L27/0014 , H04L1/0045 , H04L5/0023 , H04L5/0048 , H04L25/061 , H04L27/261 , H04L27/2657 , H04L27/2662 , H04L2027/0053 , H04L2027/0067 , H04L2027/0087
摘要： Techniques for performing phase correction for wireless communication are described. Received pilot symbols and received data symbols may be obtained from an orthogonal frequency division multiplexing (OFDM) and/or multiple-input multiple-output (MIMO) transmission. First phase information is obtained based upon the received pilot symbols. Second phase information is obtained based upon the received data symbols. The phase of the received data symbols is corrected based upon the first and second phase information (directly and/or indirectly). For example, the phase of the received data symbols may be corrected based upon the first phase information, detection may be performed on the phase corrected data symbols to obtain estimated data symbols, the second phase information may be obtained based upon the estimated data symbols, and the phase of the estimated data symbols may be corrected based upon the second phase information. The phase correction may also be performed in other manners.
摘要翻译：描述用于执行无线通信的相位校正的技术。可以从正交频分复用（OFDM）和/或多输入多输出（MIMO）传输中获得接收到的导频符号和接收的数据符号。基于接收到的导频符号获得第一相位信息。基于接收到的数据符号获得第二相位信息。基于第一和第二相位信息（直接和/或间接地）校正接收到的数据符号的相位。例如，可以基于第一相位信息来校正接收到的数据符号的相位，可以对相位校正数据符号执行检测以获得估计的数据符号，可以基于估计的数据符号获得第二相位信息，并且可以基于第二相位信息来校正估计数据符号的相位。相位校正也可以以其他方式进行。

27. 发明授权

US08923785B2 Continuous beamforming for a MIMO-OFDM system 有权
公开(公告)号：US08923785B2
公开(公告)日：2014-12-30
申请号：US11050897
申请日：2005-02-03
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04B7/02 , H04B7/06 , H04B7/04
CPC分类号： H04B7/0617 , H04B7/0408 , H04B7/0417 , H04B7/0626 , H04B7/0671
摘要： A transmitting entity performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols may be sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas. A receiving entity performs the complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity may derive a spatial filter matrix for each subband based on a MIMO channel response matrix for that subband and perform receiver spatial processing for the subband with the spatial filter matrix.

28. 发明授权

US08081728B2 Method and apparatus for clock correction in MIMO OFDM 有权
标题翻译： MIMO OFDM中的时钟校正方法和装置
公开(公告)号：US08081728B2
公开(公告)日：2011-12-20
申请号：US11734961
申请日：2007-04-13
申请人： Mark S. Wallace , Peter Monsen , Irena Medvedev , Steven J. Howard , Jay Rodney Walton
发明人： Mark S. Wallace , Peter Monsen , Irena Medvedev , Steven J. Howard , Jay Rodney Walton
IPC分类号： H04L7/00 , H03D1/04
CPC分类号： H04L27/0014 , H04L5/0023 , H04L5/0048 , H04L27/261 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L27/2679 , H04L2027/0053 , H04L2027/0067 , H04L2027/0087
摘要： A method of phase correction at a wireless device includes: estimating a phase slope for an OFDM symbol in a data portion of a packet based on an elapsed time from the start of the packet; measuring a residual phase slope from tracking pilots for the OFDM symbol in the data portion of the packet; and adjusting a phase correction based upon the phase slope and the residual phase slope. Apparatus in a wireless device performs the method and machine-readable media carry instructions for carrying out the method.
摘要翻译：一种无线设备的相位校正方法包括：基于从分组开始起的经过时间，估计分组的数据部分中的OFDM符号的相位斜率; 测量分组的数据部分中的OFDM符号的跟踪导频的残留相位斜率; 以及基于相位斜率和残余相位斜率调整相位校正。无线设备中的设备执行方法和机器可读介质携带用于执行该方法的指令。

29. 发明授权

US07978649B2 Unified MIMO transmission and reception 有权
标题翻译：统一的MIMO传输和接收
公开(公告)号：US07978649B2
公开(公告)日：2011-07-12
申请号：US10892732
申请日：2004-07-15
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04Q7/00
CPC分类号： H04B7/0413 , H04B7/0417 , H04B7/0421 , H04B7/0617 , H04L1/0026
摘要： A “unified” MIMO system that supports multiple operating modes for efficient data transmission is described. Each operating mode is associated with different spatial processing at a transmitting entity. For example, four operating modes may be defined for (1) full-CSI or partial-CSI transmission and (2) with or without steering transmit diversity (STD). An appropriate operating mode may be selected for use based on various factors (e.g., availability of a good channel estimate). With steering transmit diversity, data is spatially spread and transmitted on multiple spatial channels, and a single rate may then be used for all spatial channels used for data transmission. A receiving entity may utilize a minimum mean square error (MMSE) technique for all operating modes. The receiving entity may derive a spatial filter matrix and perform receiver spatial processing in the same manner for all operating modes, albeit with different effective channel response matrices.
摘要翻译：描述了支持多种操作模式以实现有效数据传输的“统一”MIMO系统。每个操作模式与发送实体处的不同空间处理相关联。例如，可以为（1）全CSI或部分CSI传输定义四种操作模式，以及（2）具有或不具有导向发射分集（STD）的操作模式。可以基于各种因素（例如，良好信道估计的可用性）来选择适当的操作模式来使用。利用转向发射分集，数据在空间上扩展并在多个空间信道上传输，然后可以将单个速率用于用于数据传输的所有空间信道。接收实体可以针对所有操作模式使用最小均方误差（MMSE）技术。接收实体可以导出空间滤波器矩阵并且以相同的方式对所有操作模式执行接收机空间处理，尽管具有不同的有效信道响应矩阵。

30. 发明申请

US20100074301A1 UNIFIED MIMO TRANSMISSION AND RECEPTION 有权
标题翻译：统一的MIMO传输和接收
公开(公告)号：US20100074301A1
公开(公告)日：2010-03-25
申请号：US12534137
申请日：2009-08-02
申请人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
发明人： Steven J. Howard , Jay Rodney Walton , Mark S. Wallace
IPC分类号： H04B1/69 , H04B7/02
CPC分类号： H04B7/0413 , H04B7/0417 , H04B7/0421 , H04B7/0617 , H04L1/0026
摘要： A “unified” MIMO system that supports multiple operating modes for efficient data transmission is described. Each operating mode is associated with different spatial processing at a transmitting entity. For example, four operating modes may be defined for (1) full-CSI or partial-CSI transmission and (2) with or without steering transmit diversity (STD). An appropriate operating mode may be selected for use based on various factors (e.g., availability of a good channel estimate). With steering transmit diversity, data is spatially spread and transmitted on multiple spatial channels, and a single rate may then be used for all spatial channels used for data transmission. A receiving entity may utilize a minimum mean square error (MMSE) technique for all operating modes. The receiving entity may derive a spatial filter matrix and perform receiver spatial processing in the same manner for all operating modes, albeit with different effective channel response matrices.
摘要翻译：描述了支持多种操作模式以实现有效数据传输的“统一”MIMO系统。每个操作模式与发送实体处的不同空间处理相关联。例如，可以为（1）全CSI或部分CSI传输定义四种操作模式，以及（2）具有或不具有导向发射分集（STD）的操作模式。可以基于各种因素（例如，良好信道估计的可用性）来选择适当的操作模式来使用。利用转向发射分集，数据在空间上扩展并在多个空间信道上传输，然后可以将单个速率用于用于数据传输的所有空间信道。接收实体可以针对所有操作模式使用最小均方误差（MMSE）技术。接收实体可以导出空间滤波器矩阵并且以相同的方式对所有操作模式执行接收机空间处理，尽管具有不同的有效信道响应矩阵。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式