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    Method and apparatus for performing cyclic-shift diversity with beamforming
    2.
    发明申请
    Method and apparatus for performing cyclic-shift diversity with beamforming 审中-公开
    用波束形成执行循环移位分集的方法和装置

    公开(公告)号：US20070206686A1

    公开(公告)日：2007-09-06

    申请号：US11325876

    申请日：2006-01-05

    Applicant: Frederick Vook ,  Timothy Thomas ,  Xiangyang Zhuang

    Inventor： Frederick Vook ,  Timothy Thomas ,  Xiangyang Zhuang

    IPC: H04K1/10

    CPC classification number: H04B7/0671

    Abstract: Cyclic-shift diversity transmission and optional per-subcarrier transmit beamforming within a same time interval (e.g., OFDM symbol interval) takes place. The CSD transmission technique circularly shifts the IFFT output prior to any cyclic prefix insertion and has the effect of putting a subcarrier and antenna dependent phase shift in the effective channel response from each transmit antenna. To properly perform transmit adaptive array (TXAA) transmission within an OFDM symbol interval that is being circularly shifted by the CSD transmission technique, the TXAA weights will account for the frequency domain phase shift created by the CSD circular shift operation.

    Abstract translation: 发生在相同时间间隔（例如，OFDM符号间隔）内的循环移位分集传输和可选的每副载波发射波束形成。 CSD传输技术在任何循环前缀插入之前循环移位IFFT输出，并且具有将每个发射天线的有效信道响应中的副载波和天线相关相移放在有效信道响应中的作用。 为了在通过CSD传输技术循环移位的OFDM符号间隔内适当地执行发射自适应阵列（TXAA）传输，TXAA权重将考虑由CSD循环移位操作产生的频域相移。

    Method and apparatus for MIMO transmission optimized for successive cancellation receivers
    4.
    发明申请
    Method and apparatus for MIMO transmission optimized for successive cancellation receivers 有权
    用于连续取消接收机优化的MIMO传输的方法和装置

    公开(公告)号：US20060067277A1

    公开(公告)日：2006-03-30

    申请号：US11209308

    申请日：2005-08-23

    Applicant: Timothy Thomas ,  Kevin Baum ,  Frederick Vook ,  Xiangyang Zhuang

    Inventor： Timothy Thomas ,  Kevin Baum ,  Frederick Vook ,  Xiangyang Zhuang

    IPC: H04Q7/00

    CPC classification number: H04B7/0634 ,  H04B7/04 ,  H04B7/0636 ,  H04B7/0639 ,  H04B7/066 ,  H04B7/0691 ,  H04L27/2601

    Abstract: A method for communicating a plurality of data streams between a transmitting device with multiple transmit antennas and a receiving device, is disclosed. The method comprises determining a list consisting of a subset of the multiple transmit antennas on which the transmitting device will transmit data, determining a set of power weightings, providing the set of power weightings and the list of the subset of the multiple transmit antennas to the transmitting device, weighting a plurality of data streams by the power weightings, and transmitting the power weighted data streams on the subset of the multiple transmit antennas to the receiving device. Another aspect of the invention comprises maintaining a codebook consisting of a plurality of transmit weight vectors at both the transmitting device and the receiving device. The method also comprises determining a list consisting of a subset of the plurality of transmit weight vectors which to use for transmitting the multiple data streams, determining a set of power weightings to be use for each data stream, providing the set of power weightings and the list of the subset of the plurality of transmit weight vectors to the transmitting device, and weighting the data streams by the power weightings and beamforming the data streams with the subset of the plurality of transmit weight vectors.

    Abstract translation: 公开了一种在具有多个发射天线的发射装置与接收装置之间传送多个数据流的方法。 该方法包括确定由发射设备将在其上发射数据的多个发射天线的子集组成的列表，确定一组功率加权，提供该组功率加权和多个发射天线的子集的列表到 发送设备，通过功率加权对多个数据流进行加权，以及将多个发射天线的子集上的功率加权数据流发送到接收设备。 本发明的另一方面包括在发送设备和接收设备两者处维护由多个发送权重向量组成的码本。 该方法还包括确定由用于发送多个数据流的多个发射权重向量的子集组成的列表，确定要为每个数据流使用的一组功率权重，提供该组功率权重和 将多个发射权重向量的子集的列表发送到发射装置，以及通过功率加权对数据流进行加权，并且利用多个发射权重向量的子集对数据流进行波束形成。

    METHOD AND APPARATUS FOR PERFORMING SPATIAL-DIVISION MULTIPLE ACCESS
    5.
    发明申请
    METHOD AND APPARATUS FOR PERFORMING SPATIAL-DIVISION MULTIPLE ACCESS 有权
    用于执行空间分割多路访问的方法和装置

    公开(公告)号：US20070183362A1

    公开(公告)日：2007-08-09

    申请号：US11275938

    申请日：2006-02-06

    Applicant: Bishwarup Mondal ,  Xiangyang Zhuang ,  Kevin Baum ,  Timothy Thomas ,  Frederick Vook

    Inventor： Bishwarup Mondal ,  Xiangyang Zhuang ,  Kevin Baum ,  Timothy Thomas ,  Frederick Vook

    IPC: H04Q7/00

    CPC classification number: H04B7/0617 ,  H04B7/0452 ,  H04B7/0634 ,  H04B7/0639 ,  Y02D70/444

    Abstract: A method and apparatus for performing spatial-division multiple access within a communication system is provided herein. During operation, nodes will return null subspace information along with their channel subspace information. The null subspace is similar to the channel subspace except that the null subspace information directs a base station to the matrix in a predefined codebook that results in minimum power being received at the node. The null subspace for each node is taken into consideration when communicating with a particular node.

    Abstract translation: 本文提供了一种在通信系统内执行空分多址的方法和装置。 在运行期间，节点将返回空子空间信息及其信道子空间信息。 空子空间类似于信道子空间，除了空子信息将基站指向预定码本中的矩阵，导致节点接收的最小功率。 当与特定节点进行通信时，将考虑每个节点的空子空间。

    Method and system for aggregate channel estimation for frequency-selective transmit beamforming
    6.
    发明申请
    Method and system for aggregate channel estimation for frequency-selective transmit beamforming 审中-公开
    频率选择性发射波束成形的聚合信道估计方法和系统

    公开(公告)号：US20070147533A1

    公开(公告)日：2007-06-28

    申请号：US11317382

    申请日：2005-12-23

    Applicant: Timothy Thomas ,  Frederick Vook ,  Xiangyang Zhuang

    Inventor： Timothy Thomas ,  Frederick Vook ,  Xiangyang Zhuang

    IPC: H04L1/02

    CPC classification number: H04L25/025 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0689 ,  H04B7/0697 ,  H04B17/364 ,  H04L25/024

    Abstract: A system (10) and method (50) of operating a wireless communication system between a transmit device (12) employing an array of transmit antennas and a receiver (15) can include transmitting (52) a beamformed signal with antenna weights computed based on knowledge of a plurality of channels forming an aggregate channel and computing (54) a set of characteristics for the aggregate channel such as a power delay profile, a frequency correlation, or an expected beamforming gain of the aggregate channel. Characteristics can also be based on factors among a number of transmit antennas, a beamforming weight application delay value, an expected Doppler profile, or an expected delay profile of the propagation channel. The method can further determine (58) a channel estimator based on the computed set of characteristics, receive (62) the beamformed signal, and compute (64) an aggregate channel estimate as a function of the channel estimator and the beamformed signal.

    Abstract translation: 在采用发射天线阵列的发射设备（12）和接收机（15）之间操作无线通信系统的系统（10）和方法（50）可以包括：发射（52）波束形成的信号，其中天线权重基于 形成聚合信道的多个信道的知识，以及计算（54）聚合信道的一组特征，例如聚合信道的功率延迟分布，频率相关或期望的波束形成增益。 特性还可以基于多个发射天线中的因素，波束成形加权应用延迟值，期望的多普勒分布或传播信道的预期延迟分布。 该方法可以基于所计算的特征集合进一步确定（58）信道估计器，接收（62）波束形成的信号，并且计算（64）作为信道估计器和波束形成信号的函数的聚合信道估计。

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