Methods and systems for peer-to-peer network discovery using multi-user diversity
    72.
    发明授权
    Methods and systems for peer-to-peer network discovery using multi-user diversity 有权
    使用多用户多样性的对等网络发现的方法和系统

    公开(公告)号:US08478776B2

    公开(公告)日:2013-07-02

    申请号:US12610255

    申请日:2009-10-30

    IPC分类号: G06F17/00

    摘要: A collection of nodes in a peer-to-peer (P2P) network can have a larger aggregate coverage footprint than any given single node. This inherent multi-site property of P2P wireless networks can provide each node with benefits of multi-user diversity. This can improve the effective coverage of nodes within a P2P wireless network and improve discovery of devices in the P2P network.

    摘要翻译: 点对点(P2P)网络中的节点集合可以具有比任何给定的单个节点更大的聚合覆盖范围。 P2P无线网络固有的多站点属性可以为每个节点提供多用户多样性的优势。 这可以提高P2P无线网络内节点的有效覆盖,改善P2P网络中设备的发现。

    METHOD, APPARATUS, AND SYSTEM FOR MULTIPLEXING PROTOCOL DATA UNITS
    73.
    发明申请
    METHOD, APPARATUS, AND SYSTEM FOR MULTIPLEXING PROTOCOL DATA UNITS 有权
    用于多协议协议数据单元的方法,装置和系统

    公开(公告)号:US20120287856A1

    公开(公告)日:2012-11-15

    申请号:US13555174

    申请日:2012-07-22

    IPC分类号: H04W40/00

    摘要: Embodiments addressing MAC processing for efficient use of high throughput systems are disclosed. In one aspect, a protocol stack is disclosed comprising one or more of the following: an adaptation layer, a data link control layer, a physical layer, and a layer manager. In another aspect, physical layer feedback is used for adaptation layer processing. In one embodiment, physical layer feedback is used for segmentation. In another embodiment, physical layer feedback is used for multicast mapping onto one or more unicast channels. In another aspect, a data unit for transmission from a first station to a second station comprises zero or more complete sub-data units, zero or one partial sub-data units from a prior transmission, and zero or one partial sub-data units to fill the data unit. In one embodiment, a pointer may be used to indicate the location of any complete sub-data units.

    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。 一方面,公开了一种协议栈,其包括以下一个或多个:适配层,数据链路控制层,物理层和层管理器。 在另一方面,物理层反馈用于适应层处理。 在一个实施例中,物理层反馈用于分割。 在另一个实施例中,物理层反馈用于到一个或多个单播信道上的多播映射。 在另一方面,用于从第一站到第二站的传输的数据单元包括零个或多个完整的子数据单元,来自先前传输的零个或一个部分子数据单元,以及零个或一个部分子数据单元 填写数据单元。 在一个实施例中,可以使用指针来指示任何完整的子数据单元的位置。

    METHOD AND SYSTEM FOR PROVIDING BEAMFORMING FEEDBACK IN WIRELESS COMMUNICATION SYSTEMS
    75.
    发明申请
    METHOD AND SYSTEM FOR PROVIDING BEAMFORMING FEEDBACK IN WIRELESS COMMUNICATION SYSTEMS 有权
    在无线通信系统中提供波束形成反馈的方法和系统

    公开(公告)号:US20120127899A1

    公开(公告)日:2012-05-24

    申请号:US13277450

    申请日:2011-10-20

    IPC分类号: H04W4/00

    摘要: Techniques to support beamforming for stations in a wireless network are described. A station may support beamforming with implicit or explicit feedback by having capabilities to transmit and receive sounding frames, responding to training request by sending a sounding frame, and responding to request for explicit feedback. In one explicit beamforming embodiment, the station may send a first frame with an explicit feedback request and may also send a Null Data Packet (NDP) having at least one training field but no data field. The station may receive a second frame with explicit feedback, which may be derived based on the NDP. The station may derive steering information based on explicit feedback and may then send a steered frame with beamforming based on the steering information. Other aspects, embodiments, and features are also claimed and described.

    摘要翻译: 描述了支持无线网络中的站的波束成形的技术。 站可以通过具有发送和接收探测帧的能力来支持具有隐式或显式反馈的波束成形,通过发送探测帧来响应训练请求,以及响应对显式反馈的请求。 在一个明确的波束形成实施例中,站可以发送具有显式反馈请求的第一帧,并且还可以发送具有至少一个训练场但不包括数据字段的空数据分组(NDP)。 该站可以接收具有显式反馈的第二帧,其可以基于NDP导出。 该站可以基于显式反馈导出转向信息,然后可以基于转向信息发送具有波束成形的转向帧。 还要求和描述其它方面,实施例和特征。

    Broadcast transmission with spatial spreading in a multi-antenna communication system
    78.
    发明授权
    Broadcast transmission with spatial spreading in a multi-antenna communication system 有权
    在多天线通信系统中具有空间扩展的广播传输

    公开(公告)号:US07899131B2

    公开(公告)日:2011-03-01

    申请号:US11870380

    申请日:2007-10-10

    IPC分类号: H04L27/04 H04B7/02

    摘要: An access point in a multi-antenna system broadcasts data using spatial spreading to randomize an “effective” channel observed by each user terminal for each block of data symbols broadcast by the access point. At the access point, data is coded, interleaved, and modulated to obtain ND data symbol blocks to be broadcast in NM transmission spans, where ND≧1 and NM>1. The ND data symbol blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and broadcast via NT transmit antennas and in one transmission span to user terminals within a broadcast coverage area.

    摘要翻译: 多天线系统中的接入点使用空间扩展广播数据,以随机化由接入点广播的每个数据符号块由每个用户终端观察到的“有效”信道。 在接入点,对数据进行编码,交织和调制,以获得ND数据符号块,在ND传输范围内广播,其中ND≥1,NM> 1。 ND数据符号块被划分为NM数据符号子块,每个传输跨度的一个子块。 对于每个子块,选择导向矩阵(例如,从一组L个导引矩阵中以确定性或伪随机方式)。 利用为该子块选择的导引矩阵来对每个数据符号子块进行空间处理,以获得进一步的处理并经由NT个发射天线广播的传输符号,并在一个传输范围内广播到广播覆盖区域内的用户终端。

    Eigenvalue decomposition and singular value decomposition of matrices using Jacobi rotation
    79.
    发明授权
    Eigenvalue decomposition and singular value decomposition of matrices using Jacobi rotation 有权
    使用Jacobi旋转的矩阵的特征值分解和奇异值分解

    公开(公告)号:US07895254B2

    公开(公告)日:2011-02-22

    申请号:US11280596

    申请日:2005-11-15

    IPC分类号: G06F7/32

    摘要: Techniques for decomposing matrices using Jacobi rotation are described. Multiple iterations of Jacobi rotation are performed on a first matrix of complex values with multiple Jacobi rotation matrices of complex values to zero out the off-diagonal elements in the first matrix. For each iteration, a submatrix may be formed based on the first matrix and decomposed to obtain eigenvectors for the submatrix, and a Jacobi rotation matrix may be formed with the eigenvectors and used to update the first matrix. A second matrix of complex values, which contains orthogonal vectors, is derived based on the Jacobi rotation matrices. For eigenvalue decomposition, a third matrix of eigenvalues may be derived based on the Jacobi rotation matrices. For singular value decomposition, a fourth matrix with left singular vectors and a matrix of singular values may be derived based on the Jacobi rotation matrices.

    摘要翻译: 描述了使用雅可比旋转分解矩阵的技术。 对具有复数值的多个Jacobi旋转矩阵的复数值的第一矩阵执行Jacobi旋转的多次迭代,以将第一矩阵中的非对角线元素归零。 对于每次迭代,可以基于第一矩阵形成子矩阵并分解以获得子矩阵的特征向量,并且可以与特征向量形成雅可比旋转矩阵并用于更新第一矩阵。 基于Jacobi旋转矩阵导出包含正交向量的第二个复数值矩阵。 对于特征值分解,可以基于Jacobi旋转矩阵导出特征值的第三矩阵。 对于奇异值分解,可以基于雅可比旋转矩阵导出具有左奇异矢量的第四矩阵和奇异值矩阵。

    Method and system for increased bandwidth efficiency in multiple input—multiple output channels
    80.
    发明授权
    Method and system for increased bandwidth efficiency in multiple input—multiple output channels 有权
    在多输入多输出通道中提高带宽效率的方法和系统

    公开(公告)号:US07881360B2

    公开(公告)日:2011-02-01

    申请号:US10810442

    申请日:2004-03-26

    申请人: John W. Ketchum

    发明人: John W. Ketchum

    IPC分类号: H04B1/00

    摘要: In one disclosed embodiment, an input bit stream is supplied to a trellis code block. For example, the trellis code block can perform convolutional coding using a rate 6/7 code. The output of the trellis code block is then modulated using, for example, trellis coded quadrature amplitude modulation with 128 signal points or modulation symbols. The sequence of modulation symbols thus generated can be diversity encoded. The diversity encoding can be either a space time encoding, for example, or a space frequency encoding. The sequence of modulation symbols, or the sequence of diversity encoded modulation symbols, is fed to two or more orthogonal Walsh covers. For example, replicas of the modulation symbol sequences can be provided to increase diversity, or demultiplexing the modulation symbol sequences can be used to increase data transmission rate or “throughput.” The outputs of the Walsh covers are fed as separate inputs into a communication channel.

    摘要翻译: 在一个公开的实施例中,输入比特流被提供给网格码块。 例如,网格码块可以使用速率6/7码进行卷积编码。 然后使用例如具有128个信号点或调制符号的网格编码正交幅度调制来调制格状码块的输出。 如此生成的调制符号的序列可以被分集编码。 分集编码可以是例如空间时间编码或空间频率编码。 调制符号序列或分集编码调制符号的序列被馈送到两个或更多个正交沃尔什覆盖。 例如,可以提供调制符号序列的副本以增加分集,或者解复用调制符号序列可用于增加数据传输速率或“吞吐量”.Walsh覆盖的输出作为单独的输入馈送到通信信道 。