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    • 6. 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。