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    • 5. 发明申请
    • CYCLIC DELAY DIVERSITY AND PRECODING FOR WIRELESS COMMUNICATION
    • 循环延迟多样性和无线通信预测
    • WO2008098092A2
    • 2008-08-14
    • PCT/US2008053232
    • 2008-02-06
    • QUALCOMM INCKIM BYOUNG-HOONMALLADI DURGA PRASADZHANG XIAOXIAYOO TAESANG
    • KIM BYOUNG-HOONMALLADI DURGA PRASADZHANG XIAOXIAYOO TAESANG
    • H04B7/0671H04B7/0473H04L5/0023H04L25/03898H04L27/2646
    • Techniques for sending a MIMO transmission using a combination of cyclic delay diversity and precoding are described. A set of delays (e.g., zero delay, small delay, and large delay) for cyclic delay diversity and a set of precoding matrices may be supported. In one design, a Node B may select a delay specifically for a UE or for a set of UEs served by the Node B. In another design, a UE may evaluate different combinations of precoding matrix and delay, determine the combination with the best performance, and send this combination of precoding matrix and delay to the Node B. The Node B may perform precoding with the precoding matrix and then processing for cyclic delay diversity based on the selected delay. Alternatively, the Node B may perform processing for cyclic delay diversity based on the selected delay and then precoding with the precoding matrix.
    • 描述了使用循环延迟分集和预编码的组合来发送MIMO传输的技术。 可以支持用于循环延迟分集和一组预编码矩阵的一组延迟(例如,零延迟,小延迟和大延迟)。 在一种设计中,节点B可以针对UE或由节点B服务的一组UE选择延迟。在另一种设计中,UE可以评估预编码矩阵和延迟的不同组合,确定具有最佳性能的组合 并将预编码矩阵和延迟的组合发送到节点B.节点B可以利用预编码矩阵执行预编码,然后基于所选择的延迟来执行循环延迟分集的处理。 或者,节点B可以基于所选择的延迟执行循环延迟分集的处理,然后用预编码矩阵进行预编码。
    • 7. 发明申请
    • PRECODING CONTROL CHANNELS IN WIRELESS NETWORKS
    • 预测无线网络中的控制信道
    • WO2011005533A3
    • 2011-04-21
    • PCT/US2010039522
    • 2010-06-22
    • QUALCOMM INCLUO TAODOAN DUNG NYOO TAESANGZHANG XIAOXIASEONG KIBEOM
    • LUO TAODOAN DUNG NYOO TAESANGZHANG XIAOXIASEONG KIBEOM
    • H04L25/03
    • H04L25/03343H04B7/0413H04B7/0456H04L5/0048H04L2025/03414H04L2025/03426
    • Systems and methodologies are described that facilitate precoding signals transmitted over downlink control channels to provide transmit diversity. A dedicated reference signal (DRS) related to a wireless device can additionally be precoded such that the wireless device can determine a precoder or related parameters based at least in part on performing a channel estimate for the precoded DRS signal. The wireless device can utilize the determined precoder or related parameters to decode precoded signals received over downlink control channel resources. Additionally or alternatively, an access point can signal a sequence of precoders to the wireless device. The access point can cycle through the sequence of precoders to precode signals for transmission over downlink control channel resources, and the wireless device can decode the signals based at least in part on similarly cycling through the precoders for received signals.
    • 描述了有助于对通过下行链路控制信道传输的信号进行预编码以提供传输分集的系统和方法。 另外可以对与无线设备相关的专用参考信号(DRS)进行预编码,使得无线设备可以至少部分地基于对预编码的DRS信号执行信道估计来确定预编码器或相关参数。 无线设备可以利用所确定的预编码器或相关参数对通过下行链路控制信道资源接收到的预编码信号进行解码。 附加地或可选地,接入点可以向无线设备发送一系列预编码器。 接入点可循环通过预编码器序列以预编码信号以通过下行链路控制信道资源进行传输,并且无线设备可至少部分地基于针对接收信号的预编码器的类似循环来解码信号。
    • 10. 发明申请
    • TRANSMISSION OF UE-SPECIFIC REFERENCE SIGNAL FOR WIRELESS COMMUNICATION
    • 用于无线通信的UE特定参考信号的传输
    • WO2011032033A3
    • 2011-06-09
    • PCT/US2010048519
    • 2010-09-10
    • QUALCOMM INCZHANG XIAOXIAWEI YONGBINLUO TAODOAN DUNG NGOCYOO TAESANG
    • ZHANG XIAOXIAWEI YONGBINLUO TAODOAN DUNG NGOCYOO TAESANG
    • H04L5/00
    • H04L5/0051H04L5/0032H04L5/0037
    • Techniques for transmitting UE-specific reference signals (UE-RSs) in a wireless network are described. In an aspect, a UE-RS may be transmitted in different manners depending on the number of layers used for data transmission. In one design, a cell may determine subcarriers for a UE-RS based on a frequency shift if data is transmitted on one layer and based on a predetermined set of subcarriers (with no frequency shift) if data is transmitted on multiple layers. In another aspect, a UE-RS may be transmitted on subcarriers determined based on a frequency shift for data transmission on multiple layers. In yet another aspect, a UE-RS may be transmitted from a plurality of cells to a UE for coordinated multi-point (CoMP). In yet another aspect, a UE-RS may be transmitted in a data section of a subframe including only the data section.
    • 描述了用于在无线网络中发送UE特定参考信号(UE-RS)的技术。 在一个方面,取决于用于数据传输的层的数量,可以以不同的方式发送UE-RS。 在一个设计中,如果数据在一个层上传输并且基于预定的一组副载波(没有频移),如果数据在多个层上传输,则小区可以基于频移确定用于UE-RS的副载波。 在另一方面,可以在基于用于多层上的数据传输的频移确定的副载波上发送UE-RS。 在又一方面,可以将UE-RS从多个小区发送到用于协调多点(CoMP)的UE。 在又一方面,可以在仅包括数据部分的子帧的数据部分中发送UE-RS。