Coordinated transmissions in wireless networks
    43.
    发明授权
    Coordinated transmissions in wireless networks 有权
    无线网络中的协调传输

    公开(公告)号:US08072946B2

    公开(公告)日:2011-12-06

    申请号:US11394464

    申请日:2006-03-30

    IPC分类号: H04W4/00

    摘要: Overall network throughput may be increased in a wireless network through coordinated transmission between wireless network stations. A wireless network station selects beamforming information based at least in part on interference to other wireless network stations.

    摘要翻译: 通过无线网络站之间的协调传输,可以在无线网络中增加总体网络吞吐量。 无线网络站至少部分地基于对其他无线网络站的干扰来选择波束形成信息。

    Interpolation in channel state feedback
    46.
    发明授权
    Interpolation in channel state feedback 有权
    通道状态反馈插值

    公开(公告)号:US07961802B2

    公开(公告)日:2011-06-14

    申请号:US12424259

    申请日:2009-04-15

    IPC分类号: H04K1/10 H04L27/28

    摘要: Feedback bandwidth may be reduced in a closed loop MIMO system by Householder transformations, vector quantization using codebooks, and down-sampling in the frequency domain. A column of a beamforming matrix is quantized using a codebook, a Householder reflection is performed on the beamforming matrix to reduce the dimensionality of the beamforming matrix, and the quantizing and performing of Householder reflection on the previously dimensionality reduced beamforming matrix is recursively repeated to obtain a further reduction of dimensionality of the beamforming matrix. These actions are performed for a subset of orthogonal frequency divisional multiplexing (OFDM) carriers, and quantized column vectors for the subset of OFDM carriers are transmitted.

    摘要翻译: 在闭环MIMO系统中,通过Householder变换,使用码本的矢量量化和频域中的下采样可以减少反馈带宽。 使用码本对波束成形矩阵的列进行量化,对波束成形矩阵执行Householder反射以减小波束成形矩阵的维数,并且递归地重复量化并执行先前维数减小的波束形成矩阵中的Householder反射以获得 波束形成矩阵的维度的进一步降低。 对于正交频分复用(OFDM)载波的子集执行这些动作,并且发送用于OFDM载波子集的量化列向量。

    Relays in wireless communication networks
    47.
    发明授权
    Relays in wireless communication networks 有权
    无线通信网络中的继电器

    公开(公告)号:US07907540B2

    公开(公告)日:2011-03-15

    申请号:US11959351

    申请日:2007-12-18

    IPC分类号: H04J1/16

    摘要: Methods and apparatus for transmitting packets in wireless communication networks are disclosed. The methods include a relay mobile station measuring channel quality between the relay mobile station and a destination mobile station in response to a request for relay mobile stations from a base station The relay mobile station reports a channel quality indicator to the base station if the channel quality for a link between the base station and the destination mobile station via the relay mobile station is greater than a predetermined channel quality. The base station determines the relay mobile station that provides an optimal route for transmitting the packets from the base station to the destination mobile station.

    摘要翻译: 公开了在无线通信网络中传送分组的方法和装置。 所述方法包括响应于从基站对中继移动台的请求,测量中继移动台和目的地移动台之间的信道质量的中继移动台。如果信道质量,中继移动台向基站报告信道质量指示符 用于基站和目的地移动台之间经由中继移动站的链路大于预定信道质量。 基站确定提供用于从基站向目的地移动台发送分组的最佳路由的中继移动台。

    Differential codebook for a wireless network, MIMO beamforming system using same, and method of reducing a quantization error in a MIMO beamforming system for a wireless network using same
    48.
    发明申请
    Differential codebook for a wireless network, MIMO beamforming system using same, and method of reducing a quantization error in a MIMO beamforming system for a wireless network using same 审中-公开
    用于无线网络的差分码本,使用该无线网络的MIMO波束成形系统以及使用该无线网络的用于使用无线网络的MIMO波束形成系统中的量化误差的方法

    公开(公告)号:US20100226357A1

    公开(公告)日:2010-09-09

    申请号:US12658105

    申请日:2010-02-02

    IPC分类号: H04B7/216 H04K1/10

    摘要: A differential codebook for a wireless network includes a plurality of codewords and [e1 . . . eNs] G as a center location of the plurality of codewords, where ek represents a column vector comprising a plurality of rows including a k-th row and in which an entry on the k-th row is one and entries on each of the plurality of rows except for the k-th row are zero, where G is any Ns by Ns unitary matrix including the identity matrix, and where Ns, represents a number of spatial streams in the wireless network. At least two of the plurality of codewords are symmetric about the center location.

    摘要翻译: 无线网络的差分码本包括多个码字,[e1。 。 。 eNs] G作为多个码字的中心位置,其中ek表示包括包括第k行的多行的列向量,并且其中第k行中的条目是1,并且多个行中的每一个上的条目 除了第k行以外的行是零,其中G是包括单位矩阵的任何Ns乘Ns酉矩阵,并且其中Ns表示无线网络中的空间流的数量。 多个码字中的至少两个码字关于中心位置是对称的。

    DOWNLINK TRANSMIT BEAMFORMING
    49.
    发明申请
    DOWNLINK TRANSMIT BEAMFORMING 有权
    下行发射波束形成

    公开(公告)号:US20100189068A1

    公开(公告)日:2010-07-29

    申请号:US12752517

    申请日:2010-04-01

    IPC分类号: H04W72/04

    摘要: A wireless network access point can operate as a closed loop MIMO device when communicating with a station that is operating as an open loop MIMO device. Transmit/receive chains in the access point are calibrated to support aggregate channel reciprocity.

    摘要翻译: 当与作为开环MIMO设备操作的站通信时,无线网络接入点可以作为闭环MIMO设备操作。 校准接入点中的发送/接收链以支持聚合信道互易。