METHOD AND APPARATUS FOR ANTENNA DIVERSITY IN MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEMS
    7.
    发明申请
    METHOD AND APPARATUS FOR ANTENNA DIVERSITY IN MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEMS 有权
    多输入多输出通信系统中天线多样性的方法与装置

    公开(公告)号:US20120120925A1

    公开(公告)日:2012-05-17

    申请号:US13271121

    申请日:2011-10-11

    IPC分类号: H04W72/04

    摘要: Transmission schemes that can flexibly achieve the desired spatial multiplexing order, spatial diversity order, and channel estimation overhead order are described. For data transmission, the assigned subcarriers and spatial multiplexing order (M) for a receiver are determined, where M≧1. For each assigned subcarrier, M virtual antennas are selected from among V virtual antennas formed with V columns of an orthonormal matrix, where V≧M. V may be selected to achieve the desired spatial diversity order and channel estimation overhead order. Output symbols are mapped to the M virtual antennas selected for each assigned subcarrier by applying the orthonormal matrix. Pilot symbols are also mapped to the V virtual antennas. The mapped symbols are provided for transmission from T transmit antennas, where T≧V. Transmission symbols are generated for the mapped symbols, e.g, based on OFDM or SC-FDMA. Different cyclic delays may be applied for the T transmit antennas to improve diversity.

    摘要翻译: 描述了可以灵活地实现期望的空间复用顺序,空间分集顺序和信道估计开销顺序的传输方案。 对于数据传输,确定接收机的分配子载波和空间复用顺序(M),其中M≥1。 对于每个分配的子载波,从由正交矩阵的V列形成的V个虚拟天线中选择M个虚拟天线,其中V≥M。 可以选择V以实现期望的空间分集顺序和信道估计开销顺序。 通过应用正交矩阵将输出符号映射到为每个分配的副载波选择的M个虚拟天线。 导频符号也映射到V虚拟天线。 映射的符号被提供用于从T发射天线发射,其中T≥V。 为映射符号生成传输符号,例如基于OFDM或SC-FDMA。 可以对T发射天线应用不同的循环延迟以改善分集。

    Rank step-down for MIMO SCW design employing HARQ
    8.
    发明申请
    Rank step-down for MIMO SCW design employing HARQ 有权
    采用HARQ的MIMO SCW设计的等级降级

    公开(公告)号:US20070011550A1

    公开(公告)日:2007-01-11

    申请号:US11441742

    申请日:2006-05-25

    摘要: Systems and methodologies are described that facilitate reducing rank (e.g., of a user device) as a number of transmissions there from increases. Such rank step-down can improve interference resistance and facilitate maintaining code rate despite transmission propagation. Additionally, rank step-down information can be encoded along with CQI information to generate a 5-bit CQI signal that can facilitate updating a user's rank upon each CQI transmission (e.g., approximately every 5 ms). The described systems and/or methods can be employed in a single code word (SCW) wireless communication environment with a hybrid automatic request (HARQ) protocol.

    摘要翻译: 描述的系统和方法被简化为有助于减少等级(例如,用户设备),因为其中的传输数量增加。 这种排序降低可以改善抗干扰性,并且有助于保持代码率,尽管传输传播。 此外,等级降级信息可以与CQI信息一起编码,以产生可以有助于在每次CQI传输(例如,大约每5ms)更新用户的等级的5比特CQI信号。 所描述的系统和/或方法可以用于具有混合自动请求(HARQ)协议的单个码字(SCW)无线通信环境中。

    Rank step-down for MIMO SCW design employing HARQ
    9.
    发明授权
    Rank step-down for MIMO SCW design employing HARQ 有权
    采用HARQ的MIMO SCW设计的等级降级

    公开(公告)号:US08842693B2

    公开(公告)日:2014-09-23

    申请号:US11441742

    申请日:2006-05-25

    IPC分类号: H04J3/22 H04J13/00

    摘要: Systems and methodologies are described that facilitate reducing rank (e.g., of a user device) as a number of transmissions there from increases. Such rank step-down can improve interference resistance and facilitate maintaining code rate despite transmission propagation. Additionally, rank step-down information can be encoded along with CQI information to generate a 5-bit CQI signal that can facilitate updating a user's rank upon each CQI transmission (e.g., approximately every 5 ms). The described systems and/or methods can be employed in a single code word (SCW) wireless communication environment with a hybrid automatic request (HARQ) protocol.

    摘要翻译: 描述的系统和方法被简化为有助于减少等级(例如,用户设备),因为其中的传输数量增加。 这种排序降低可以改善抗干扰性,并且有助于保持代码率,尽管传输传播。 此外,等级降级信息可以与CQI信息一起编码,以产生可以有助于在每次CQI传输(例如,大约每5ms)更新用户的等级的5比特CQI信号。 所描述的系统和/或方法可以用于具有混合自动请求(HARQ)协议的单个码字(SCW)无线通信环境中。