Pseudo eigen-beamforming with dynamic beam selection
    2.
    发明申请
    Pseudo eigen-beamforming with dynamic beam selection 审中-公开
    具有动态波束选择的伪特征波束成形

    公开(公告)号:US20070071147A1

    公开(公告)日:2007-03-29

    申请号:US11454761

    申请日:2006-06-15

    IPC分类号: H04B7/10 H04L27/28

    摘要: Techniques for transmitting data with limited channel information are described. A transmitter (e.g., a base station) obtains channel information for a subset of multiple antennas used for data reception at a receiver (e.g., a terminal). The channel information may include at least one channel response vector for at least one antenna, which is a subset of the multiple antennas at the receiver. The transmitter derives multiple eigenvectors based on the channel information, e.g., using pseudo eigen-beamforming. The transmitter selects at least one eigenvector from among the multiple eigenvectors and transmits data with the selected eigenvector(s). The transmitter may select and use different subsets of eigenvector(s) in different time intervals. The transmitter may arrange the multiple eigenvectors into multiple sets based on their eigenvalues, select at least one set based on a MIMO transmission rank, and select one eigenvector from each set.

    摘要翻译: 描述了用有限信道信息发送数据的技术。 发射机(例如,基站)在接收机(例如,终端))获得用于数据接收的多个天线的子集的信道信息。 信道信息可以包括用于至少一个天线的至少一个信道响应向量,其是接收机处的多个天线的子集。 发射机基于信道信息导出多个特征向量,例如使用伪特征波束形成。 发射机从多个特征向量中选择至少一个特征向量,并用所选择的特征向量发送数据。 发射机可以在不同的时间间隔内选择和使用不同的特征向量子集。 发射机可以基于它们的特征值将多个特征向量排列成多个集合,基于MIMO传输秩选择至少一个集合,并从每个集合中选择一个特征向量。

    PRECODING FOR SEGMENT SENSITIVE SCHEDULING IN WIRELESS COMMUNICATION SYSTEMS
    10.
    发明申请
    PRECODING FOR SEGMENT SENSITIVE SCHEDULING IN WIRELESS COMMUNICATION SYSTEMS 有权
    无线通信系统中分段敏感调度的预测

    公开(公告)号:US20070098099A1

    公开(公告)日:2007-05-03

    申请号:US11553870

    申请日:2006-10-27

    IPC分类号: H04K1/10 H04L1/02

    摘要: Techniques to enhance the performance in a wireless communication system using segments called subbands and using precoding are shown. According to one aspect, the bandwidth for transmission to an access terminal is constrained to a preferred bandwidth which is less than the bandwidth available for transmission to an access terminal and precoding information related to the subcarriers within the constrained bandwidth is provided to a transmitter. The precoding information related to the subcarriers within a constrained bandwidth provides feedback about the forward link channel properties relative to different subbands and may be fed back on a channel associated with the bandwidth.

    摘要翻译: 示出了使用称为子带并使用预编码的段来增强在无线通信系统中的性能的技术。 根据一个方面,用于传输到接入终端的带宽被限制到比可用于传输到接入终端的带宽的优选带宽,并且将与受限带宽内的子载波相关的预编码信息提供给发射机。 与受限带宽内的子载波相关的预编码信息提供关于相对于不同子带的前向链路信道属性的反馈,并且可以在与带宽相关联的信道上反馈。