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    • 5. 发明申请
    • TRANSMIT DIVERSITY FOR SC-FDMA
    • SC-FDMA的传输多样性
    • WO2010039559A1
    • 2010-04-08
    • PCT/US2009/058106
    • 2009-09-23
    • QUALCOMM INCORPORATEDLUO, XiliangGAAL, PeterMONTOJO, JuanCHEN, Wanshi
    • LUO, XiliangGAAL, PeterMONTOJO, JuanCHEN, Wanshi
    • H04L27/26H04L5/00H04L1/06
    • H04L5/0023H04B7/0667H04B7/068H04L1/0618H04L27/2607
    • Techniques for transmitting data with transmit diversity for single-carrier frequency division multiple access (SC-FDMA) are described. In one design, a transmitter (e.g., a UE) may form a first symbol vector including first and second modulation symbol sequences. The transmitter may also form a second symbol vector including third and fourth modulation symbol sequences, which may be generated based on the second and first modulation symbol sequences, respectively. Each symbol vector may further include a cyclic prefix and possibly a cyclic postfix for each modulation symbol sequence. The transmitter may generate a first SC-FDMA symbol based on the first symbol vector and a second SC-FDMA symbol based on the second symbol vector. The transmitter may transmit the first and second SC-FDMA symbols from two transmit antennas in a single SC-FDMA symbol period to achieve transmit diversity.
    • 描述了用于单载波频分多址(SC-FDMA)发射分集的数据传输技术。 在一种设计中,发射机(例如,UE)可以形成包括第一和第二调制符号序列的第一符号向量。 发射机还可以形成包括分别基于第二和第一调制符号序列生成的第三和第四调制符号序列的第二符号向量。 每个符号向量可以进一步包括每个调制符号序列的循环前缀和可能的循环后缀。 发射机可以基于第一符号向量生成第一SC-FDMA符号,并且基于第二符号向量生成第二SC-FDMA符号。 发射机可以在单个SC-FDMA符号周期中从两个发射天线发送第一和第二SC-FDMA符号以实现发射分集。
    • 6. 发明申请
    • SELECTING ANTENNA PORTS FOR REFERENCE SIGNAL BASED ON MOBILITY AND CSI FEEDBACK IN WIRELESS NETWORKS WITH DISTRIBUTED REMOTE RADIO HEADS
    • 基于移动性的参考信号选择天线端口和无线网络中具有分布式远程无线电头的CSI反馈
    • WO2012112455A1
    • 2012-08-23
    • PCT/US2012/024896
    • 2012-02-13
    • QUALCOMM INCORPORATEDLUO, XiliangXU, HaoCHEN, WanshiJI, TingfangGAAL, PeterMONTOJO, Juan
    • LUO, XiliangXU, HaoCHEN, WanshiJI, TingfangGAAL, PeterMONTOJO, Juan
    • H04W72/08
    • H04W72/082H04W72/0413H04W72/048H04W88/085
    • Wireless networks may include remote radio heads (RRHs) for extending the coverage of a macro cell. The macro cell may be connected to the RRHs, for example, by optical fiber, and there may be negligible latency between the macro cell and the RRHs. As a user equipment (UE) moves within the macro cell, or between other macro cells, mobility procedures followed by the UE may vary based on the release of the UE (e.g., Rel-8/9, Rel-10, or Rel-11 and beyond). The macro cell may handle all the scheduling within the cell, for itself and the RRHs. The method comprises the steps of: - Receiving CSI feedback from a user equipment based on the CSI feedback, select one or more antenna ports for transmitting reference signals, wherein the one or more antenna ports are a least antenna ports of a base station or antenna ports of remote radio heads under control of the base station, - determine whether to update the selection of the one or more antenna ports based at least in part on a change in location or a mobility of the user equipment.
    • 无线网络可以包括用于扩展宏小区的覆盖的远程无线电头(RRH)。 宏小区可以例如通过光纤连接到RRH,并且在宏小区和RRH之间可能存在可忽略的等待时间。 当用户设备(UE)在宏小区内或其他宏小区之间移动时,UE所遵循的移动性过程可以基于UE的释放而变化(例如,Rel-8/9,Rel-10或Rel- 11及以上)。 宏小区可以处理单元内的所有调度,用于其本身和RRH。 该方法包括以下步骤: - 基于CSI反馈从用户设备接收CSI反馈,选择用于发送参考信号的一个或多个天线端口,其中所述一个或多个天线端口是基站或天线的最小天线端口 在基站的控制下的远程无线电头的端口, - 至少部分地基于用户设备的位置或移动性的变化来确定是否更新所述一个或多个天线端口的选择。