Precoding for segment sensitive scheduling in wireless communication systems
    2.
    发明授权
    Precoding for segment sensitive scheduling in wireless communication systems 有权
    无线通信系统中片段敏感调度的预编码

    公开(公告)号:US08639190B2

    公开(公告)日:2014-01-28

    申请号:US11553870

    申请日:2006-10-27

    IPC分类号: H04B1/00

    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。

    Precoding and SDMA support
    3.
    发明授权
    Precoding and SDMA support 有权
    预编码和SDMA支持

    公开(公告)号:US09136974B2

    公开(公告)日:2015-09-15

    申请号:US11401979

    申请日:2006-04-10

    摘要: Embodiments are described in connection with enhancing performance in a wireless communication system using codebook technology. According to an embodiment is a method for enhancing performance in a wireless communication environment. The method can include receiving a user preference for a transmission mode, associating the user preference with an entry or entries in a codebook, and assigning the user to a transmission mode corresponding to the entry or entries. The transmission mode can be one of a precoding, space division multiple access (SDMA), SDMA precoding, multiple input multiple output (MIMO), MIMO precoding, MIMO-SDMA and a diversity. Each entry can correspond to a transmission mode.

    摘要翻译: 结合增强使用码本技术的无线通信系统中的性能来描述实施例。 根据实施例是用于增强无线通信环境中的性能的方法。 该方法可以包括接收用户对传输模式的偏好,将用户偏好与码本中的条目或条目相关联,并将用户分配给与条目或条目相对应的传输模式。 传输模式可以是预编码,空分多址(SDMA),SDMA预编码,多输入多输出(MIMO),MIMO预编码,MIMO-SDMA和分集之一。 每个条目可以对应于传输模式。

    METHOD AND APPARATUS FOR PRE-CODING FOR A MIMO SYSTEM
    4.
    发明申请
    METHOD AND APPARATUS FOR PRE-CODING FOR A MIMO SYSTEM 审中-公开
    用于MIMO系统的预编码的方法和装置

    公开(公告)号:US20070165738A1

    公开(公告)日:2007-07-19

    申请号:US11552948

    申请日:2006-10-25

    IPC分类号: H04L1/02

    CPC分类号: H04L1/0687

    摘要: Systems and methodologies are described that facilitates computing a precoding index which correlates to a precoding matrix within a codebook. According to various aspects, systems and/or methods are described that facilitate computing an effective signal-to-noise ratio (SNR). Such systems and/or methods may further facilitate selecting a precoding matrix and a corresponding precoding index. Such systems and/or methods may still further facilitate employing the precoding matrix in a MIMO wireless communication system.

    摘要翻译: 描述了有助于计算与码本内的预编码矩阵相关的预编码索引的系统和方法。 根据各个方面,描述了有助于计算有效信噪比(SNR)的系统和/或方法。 这样的系统和/或方法可以进一步促进选择预编码矩阵和相应的预编码索引。 这样的系统和/或方法还可以进一步促进在MIMO无线通信系统中采用预编码矩阵。

    Pseudo eigen-beamforming with dynamic beam selection
    5.
    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。

    Linear precoding for time division duplex system
    6.
    发明授权
    Linear precoding for time division duplex system 有权
    时分双工系统的线性预编码

    公开(公告)号:US07948959B2

    公开(公告)日:2011-05-24

    申请号:US11552960

    申请日:2006-10-25

    摘要: Systems and methodologies are described that facilitate generating and/or utilizing explicit and implicit feedback related to a forward link channel for linear precoding in a time division duplex (TDD) multiple-input multiple-output (MIMO) system. Implicit feedback may be provided by estimating a reverse link channel, which may be substantially similar to at least a portion of the forward link channel (e.g., based upon reciprocity). Moreover, explicit feedback may be yielded by quantizing at least part of an estimate of the forward link channel (e.g., utilizing vector and/or scalar quantization).

    摘要翻译: 描述了有助于在时分双工(TDD)多输入多输出(MIMO)系统中生成和/或利用与用于线性预编码的前向链路信道相关的显式和隐式反馈。 可以通过估计反向链路信道来提供隐式反馈,反向链路信道可以基本上类似于前向链路信道的至少一部分(例如,基于互惠)。 此外,可以通过量化前向链路信道的估计的至少一部分(例如,利用向量和/或标量量化)来产生显式反馈。