SDMA COMMUNICATIONS WITH NON-IMMEDIATE BLOCK ACKNOWLEDGMENT
    62.
    发明申请
    SDMA COMMUNICATIONS WITH NON-IMMEDIATE BLOCK ACKNOWLEDGMENT 有权
    SDMA通信与非立即块确认

    公开(公告)号:US20080181162A1

    公开(公告)日:2008-07-31

    申请号:US11923631

    申请日:2007-10-24

    IPC分类号: H04J3/16 H04J15/00

    CPC分类号: H04L1/16 H04L1/1854 H04L1/188

    摘要: In Spatial Division Multiple Access (SDMA) communications, mobile devices that are transmitting to a base substantially simultaneously during a predetermined communications phase may wait until after an end of the predetermined communications phase to receive acknowledgments to their transmissions, so that a mobile device making a relatively short transmission does not experience an acknowledgement timeout while another mobile device is still completing a relatively long transmission. In some embodiments, the mobile devices may transmit a non-immediate block acknowledgement request during the communications phase.

    摘要翻译: 在空分多址(SDMA)通信中,在预定通信阶段基本上同时发送到基站的移动设备可以等待直到预定通信阶段结束以接收对其传输的确认,从而使得移动设备 相对短的传输在另一移动设备仍然完成相对长的传输时不经历确认超时。 在一些实施例中,移动设备可以在通信阶段期间发送非即时块确认请求。

    Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system
    63.
    发明授权
    Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system 有权
    多天线正交频分复用通信系统中自适应比特加载的系统和方法

    公开(公告)号:US07394858B2

    公开(公告)日:2008-07-01

    申请号:US10750587

    申请日:2003-12-29

    IPC分类号: H04K1/10 H04L27/28

    摘要: In an orthogonal frequency division multiplexed (OFDM) system, a transmitter and/or receiver communicate separate data streams on non-orthogonal spatial channels. Each spatial channel may use the same set of OFDM subcarriers and may take advantage of the multipath characteristics of the spatial channel allowing the communication of additional data without an increase in frequency bandwidth. Space-frequency subcarrier modulation assignments may be dynamically assigned on a per subcarrier basis as well as a per spatial channel basis to help maximize the data-carrying capacity of the channel. In some embodiments, each of the spatial channels may be associated with one of a plurality of spatially diverse antennas. In other embodiments, beamforming may be performed to allow the transmission and/or reception of signals within the spatial channels.

    摘要翻译: 在正交频分复用(OFDM)系统中,发射机和/或接收机在非正交空间信道上传送单独的数据流。 每个空间信道可以使用相同的OFDM子载波集合,并且可以利用空间信道的多径特性,允许附加数据的通信而不增加频带宽度。 可以在每个子载波基础上以及每个空间信道基础上动态分配空频子载波调制分配,以帮助最大化信道的数据承载能力。 在一些实施例中,每个空间信道可以与多个空间多样的天线中的一个相关联。 在其他实施例中,可以执行波束成形以允许空间信道内的信号的发送和/或接收。

    Multicarrier transmitter and method for transmitting multiple data streams with cyclic delay diversity
    66.
    发明申请
    Multicarrier transmitter and method for transmitting multiple data streams with cyclic delay diversity 有权
    多载波发射机和用于发送具有循环延迟分集的多个数据流的方法

    公开(公告)号:US20060068698A1

    公开(公告)日:2006-03-30

    申请号:US10954734

    申请日:2004-09-29

    IPC分类号: H04K3/00

    摘要: A multicarrier transmitter may transmit cyclically delayed linear combinations of two or more data streams with three or more antennas. In some embodiments, the multicarrier transmitter may transmit cyclically delayed linear combinations of three data streams with four antennas.

    摘要翻译: 多载波发射机可以用三个或更多个天线发送两个或更多个数据流的循环延迟的线性组合。 在一些实施例中,多载波发射机可以用四个天线发射三个数据流的循环延迟的线性组合。

    SDMA training operations
    67.
    发明申请
    SDMA training operations 审中-公开
    SDMA培训操作

    公开(公告)号:US20050147115A1

    公开(公告)日:2005-07-07

    申请号:US10745891

    申请日:2003-12-24

    CPC分类号: H04W16/28 H04W48/02

    摘要: During a training phase in a network using spatial division multiple access (SDMA) techniques, frame types that trigger network allocation vectors may be used in the training phase to prevent unwanted devices from transmitting during the training phase.

    摘要翻译: 在使用空分多址(SDMA)技术的网络的训练阶段期间,可以在训练阶段使用触发网络分配向量的帧类型,以在训练阶段期间防止不需要的设备发射。

    Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system
    68.
    发明申请
    Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system 有权
    多天线正交频分复用通信系统中自适应比特加载的系统和方法

    公开(公告)号:US20050147076A1

    公开(公告)日:2005-07-07

    申请号:US10750587

    申请日:2003-12-29

    摘要: In an orthogonal frequency division multiplexed (OFDM) system, a transmitter and/or receiver communicate separate data streams on non-orthogonal spatial channels. Each spatial channel may use the same set of OFDM subcarriers and may take advantage of the multipath characteristics of the spatial channel allowing the communication of additional data without an increase in frequency bandwidth. Space-frequency subcarrier modulation assignments may be dynamically assigned on a per subcarrier basis as well as a per spatial channel basis to help maximize the data-carrying capacity of the channel. In some embodiments, each of the spatial channels may be associated with one of a plurality of spatially diverse antennas. In other embodiments, beamforming may be performed to allow the transmission and/or reception of signals within the spatial channels.

    摘要翻译: 在正交频分复用(OFDM)系统中,发射机和/或接收机在非正交空间信道上传送单独的数据流。 每个空间信道可以使用相同的OFDM子载波集合,并且可以利用空间信道的多径特性,允许附加数据的通信而不增加频带宽度。 可以在每个子载波基础上以及每个空间信道基础上动态分配空频子载波调制分配,以帮助最大化信道的数据承载能力。 在一些实施例中,每个空间信道可以与多个空间多样的天线中的一个相关联。 在其他实施例中,可以执行波束成形以允许空间信道内的信号的发送和/或接收。

    Transmission coordination for SDMA downlink communication
    70.
    发明申请
    Transmission coordination for SDMA downlink communication 审中-公开
    SDMA下行通信的传输协调

    公开(公告)号:US20050141420A1

    公开(公告)日:2005-06-30

    申请号:US10745871

    申请日:2003-12-24

    IPC分类号: H04L12/28 H04L1/00

    CPC分类号: H04L12/2854

    摘要: According to some embodiments, a technique is provided that coordinates transmission of frames to reduce collisions. Frames are coordinated according to, for example, operation type, frame length, and solicited response. A base station gains access to a wireless medium and transmits multiple coordinated frames to multiple communication units. The transmissions to the multiple communication units may be substantially simultaneous in that at least a portion of the different frames are transmitted at the same time. The different frames may be substantially back-end aligned where the maximum difference between the termination time instances of the frame transmissions is controlled to reduce collisions.

    摘要翻译: 根据一些实施例,提供了一种协调帧的传输以减少冲突的技术。 帧根据例如操作类型,帧长度和请求响应进行协调。 基站获得对无线介质的访问,并将多个协调帧发送到多个通信单元。 对多个通信单元的传输可以基本上同时进行,因为不同帧的至少一部分同时被传送。 在控制帧传输的终止时间实例之间的最大差异以减少冲突的情况下,不同的帧可以基本上是后端对齐的。