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    Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system
    3.
    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

    申请人： John Sadowsky ,  Minnie Ho ,  Sumeet Sandhu ,  Alexander Maltsev ,  Eric Jacobsen ,  Ali Sadri

    发明人： John Sadowsky ,  Minnie Ho ,  Sumeet Sandhu ,  Alexander Maltsev ,  Eric Jacobsen ,  Ali Sadri

    IPC分类号： H04L1/06 ,  H04L27/26 ,  H04W16/28 ,  H04W74/02 ,  H04J1/00

    CPC分类号： H04W16/28 ,  H04B7/0408 ,  H04L27/2602 ,  H04W74/02

    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。

    MIMO transmitter for transmitting a group of sequential OFDM symbols using a plurality of antennas
    4.
    发明授权
    MIMO transmitter for transmitting a group of sequential OFDM symbols using a plurality of antennas 有权
    MIMO发射机，用于使用多个天线发送一组顺序OFDM符号

    公开(公告)号：US08396147B2

    公开(公告)日：2013-03-12

    申请号：US12757117

    申请日：2010-04-09

    申请人： John S. Sadowsky ,  Minnie Ho ,  Eric A. Jacobsen ,  Alexander A. Maltsev ,  Ali S. Sadri ,  Sumeet Sandhu

    发明人： John S. Sadowsky ,  Minnie Ho ,  Eric A. Jacobsen ,  Alexander A. Maltsev ,  Ali S. Sadri ,  Sumeet Sandhu

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04W16/28 ,  H04B7/0408 ,  H04L27/2602 ,  H04W74/02

    摘要： A MIMO transmitter and method for transmitting a group of sequential OFDM symbols on a downlink channel using a plurality of antennas is disclosed herein. Groups of OFDM subcarriers are individually modulated in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers, corresponding symbol-modulated subcarriers are combined for transmission on each of a plurality of spatial channels, and beamforming is performed on the combined symbol-modulated subcarriers for transmission over the spatial channels. The channel comprises a plurality of the groups of the OFDM subcarriers and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments. The spatial-frequency subcarrier modulation assignments for each group are determined based on feedback by a receiver, which is determined from spatial channel characteristics of the spatial channels.

    摘要翻译： 这里公开了一种用于使用多个天线在下行链路信道上发送一组顺序OFDM符号的MIMO发射器和方法。 根据空间 - 频率副载波调制分配对OFDM子载波组进行单独调制，以生成符号调制子载波组，将多个空间信道中的每一个组合对应的符号调制副载波进行传输，并对组合 用于在空间信道上传输的符号调制副载波。 信道包括多个OFDM子载波组和每个子载波组内的OFDM子载波，并且在每组顺序OFDM符号内具有相同的空间频率副载波调制分配。 基于由空间信道的空间信道特性确定的接收机的反馈来确定每个组的空间频率副载波调制分配。

    MIMO transmitter and methods for transmitting OFDM symbols with cyclic-delay diversity
    6.
    发明授权
    MIMO transmitter and methods for transmitting OFDM symbols with cyclic-delay diversity 有权
    MIMO发射机和用于发送具有循环延迟分集的OFDM符号的方法

    公开(公告)号：US08126077B2

    公开(公告)日：2012-02-28

    申请号：US12643035

    申请日：2009-12-21

    申请人： Sumeet Sandhu

    发明人： Sumeet Sandhu

    IPC分类号： H04B7/02 ,  H04L1/02

    CPC分类号： H04L1/0071 ,  H04L1/0618 ,  H04L5/0023 ,  H04L25/0216 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/36

    摘要： A multiple-input multiple output (MIMO) transmitter and methods for transmitting orthogonal frequency division multiplexed (OFDM) symbols with cyclic-delay diversity (CDD) are generally described herein. In some embodiments, a base station uses a number of antennas for MIMO transmission of OFDM symbols. For the number of antennas, quadrature-amplitude modulated (QAM) symbols are distributed across a group of OFDM tones of a block comprising the group of tones and a group of OFDM symbols. An incremented cyclic delay is applied to the QAM symbols of the block associated with each subsequent of the antennas for CDD transmission. Each blocks is transmitted by an associated one of the antennas.

    摘要翻译： 多输入多输出（MIMO）发射机和用于发送具有循环延迟分集（CDD）的正交频分复用（OFDM）符号的方法）。 在一些实施例中，基站使用多个天线进行OFDM符号的MIMO传输。 对于天线数量，正交幅度调制（QAM）符号分布在包括音调组和一组OFDM符号的块的一组OFDM音调上。 对与用于CDD传输的每个后续天线相关联的块的QAM符号应用递增的循环延迟。 每个块由相关联的一个天线发送。

    Device, system, and method of resource allocation in a wireless network
    7.
    发明授权
    Device, system, and method of resource allocation in a wireless network 有权
    无线网络资源分配的设备，系统和方法

    公开(公告)号：US08077802B2

    公开(公告)日：2011-12-13

    申请号：US12049766

    申请日：2008-03-17

    申请人： Sumeet Sandhu ,  Feng Xue

    发明人： Sumeet Sandhu ,  Feng Xue

    IPC分类号： H04L27/04 ,  H04L23/00 ,  H04B1/00 ,  H04W72/04 ,  H04J3/16

    CPC分类号： H04L5/0037 ,  H04L5/0023 ,  H04L5/006 ,  H04W72/0453 ,  H04W72/082 ,  Y02D70/1224 ,  Y02D70/124 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/166

    摘要： Device, system, and method of resource allocation in a wireless network. Embodiments include optimal space-frequency architectures for very high peak rates in wireless systems. For example, an apparatus for wireless communication in a power-limited, very wideband system includes a wireless communication device having a media access controller (MAC) and a physical layer (PHY) that are adapted for a multiple-input-multiple-output (MIMO) orthogonal frequency-division multiple access (OFDMA) communication scheme; a plurality of antennas, operationally coupled to said device, to send and receive wireless communication signals according to the MIMO-OFDMA communication scheme; and a resource allocator, to allocate transmission resources of the device into desired MIMO channels optimized according to at least one of signal-to-noise ratio (SNR), bandwidth, number of users, and signal-to-noise-plus-interference ratio (SINR).

    摘要翻译： 无线网络资源分配的设备，系统和方法。 实施例包括用于无线系统中极高峰值速率的最佳空频架构。 例如，在功率受限的非常宽带系统中的用于无线通信的装置包括具有媒体接入控制器（MAC）和物理层（PHY）的无线通信设备，该物理层适用于多输入多输出（ MIMO）正交频分多址（OFDMA）通信方案; 多个天线，可操作地耦合到所述设备，以根据MIMO-OFDMA通信方案发送和接收无线通信信号; 以及资源分配器，用于将所述设备的传输资源分配到根据信噪比（SNR），带宽，用户数量以及信噪比加干扰比中的至少一个优化的期望MIMO信道中 （SINR）。

    Techniques to enhance diversity for a wireless system
    8.
    发明授权
    Techniques to enhance diversity for a wireless system 有权
    提高无线系统多样性的技术

    公开(公告)号：US08060033B2

    公开(公告)日：2011-11-15

    申请号：US12454726

    申请日：2009-05-20

    申请人： Nageen Himayat ,  Sumeet Sandhu

    发明人： Nageen Himayat ,  Sumeet Sandhu

    IPC分类号： H04B7/02 ,  H04K1/00 ,  H04L1/02

    CPC分类号： H04B7/0669 ,  H04B7/068 ,  H04L1/0041 ,  H04L1/0071 ,  H04L1/0606 ,  H04L27/2601

    摘要： A system, apparatus, method and article to manage diversity for a wireless multicarrier communication system are described. An apparatus may include a diversity agent to couple to a transmitter, the diversity agent to convert a determined number of input bits into symbols, interleave the symbols across multiple spatial streams, and map the symbols to tones for each spatial stream. Other embodiments are described and claimed.

    摘要翻译： 描述了一种用于管理无线多载波通信系统的分集的系统，装置，方法和文章。 设备可以包括分组代理以耦合到发射机，分集代理将确定数量的输入比特转换为符号，在多个空间流之间交织符号，并将符号映射到每个空间流的音调。 描述和要求保护其他实施例。

    Cooperative transmission apparatus, systems, and methods
    10.
    发明授权
    Cooperative transmission apparatus, systems, and methods 失效
    协同传输装置，系统和方法

    公开(公告)号：US07760678B2

    公开(公告)日：2010-07-20

    申请号：US11563386

    申请日：2006-11-27

    申请人： Sumeet Sandhu ,  Ozgur Oyman ,  Timothy F. Cox

    发明人： Sumeet Sandhu ,  Ozgur Oyman ,  Timothy F. Cox

    IPC分类号： H04B7/14 ,  H04B3/36 ,  H04J1/10 ,  H04J3/08 ,  H04J3/14

    CPC分类号： H04L25/14 ,  H04B7/15521 ,  H04B7/15592 ,  H04L1/0013 ,  H04L2001/0097

    摘要： Embodiments herein may operate at a cooperating relay station (CRS) in a wireless packet-carrying network (WPCN). A source-to-CRS (SC) link quality of an SC wireless channel may be estimated using signal quality information derived from a packet transmitted by a source station and received by the CRS. A CRS-to-destination (CD) link quality of a CD wireless channel may also be estimated using signal quality information derived from a packet transmitted by a destination station and received by the CRS. A source-to-destination (SD) link quality parameter representing SD link quality may be extracted by the CRS from the packet transmitted by the destination station. The CRS may decide whether to participate with the source station or with another CRS in transmitting an SD packet based upon the SC link quality, the CD link quality, the SD link quality, or a combination thereof. Other embodiments may be described and claimed.

    摘要翻译： 本文的实施例可以在无线分组承载网络（WPCN）中的协作中继站（CRS）处操作。 可以使用从源站发送并由CRS接收的分组导出的信号质量信息来估计SC无线信道的源到CRS（SC）链路质量。 也可以使用从由目的地站发送并由CRS接收的分组导出的信号质量信息来估计CD无线信道的CRS到目的地（CD）链路质量。 表示SD链路质量的源到目的地（SD）链路质量参数可以由目的站发送的分组由CRS提取。 CRS可以基于SC链路质量，CD链路质量，SD链路质量或其组合来决定是否与源站或另一个CRS一起发送SD分组。 可以描述和要求保护其他实施例。