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    • 27. 发明申请
    • FEEDBACK OF CHANNEL STATE INFORMATION FOR MIMO AND SUBBAND SCHEDULING IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中MIMO和子频带调度的信道状态信息反馈
    • WO2007112371A1
    • 2007-10-04
    • PCT/US2007/064962
    • 2007-03-26
    • QUALCOMM IncorporatedKIM, Byoung-hoonMALLADI, Durga PrasadDAMNJANOVIC, Jelena
    • KIM, Byoung-hoonMALLADI, Durga PrasadDAMNJANOVIC, Jelena
    • H04L1/00H04L27/26H04B7/06
    • H04L1/0026H04B7/0632H04B7/0641H04B7/066H04L1/0029H04L1/06H04L27/2608
    • Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency, across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state information may be sent as feedback.
    • 描述使用差分编码有效地发送信道状态信息的技术。 差分编码可以跨越空间,跨频率,跨空间和频率跨越空间,频率和时间,或跨越一些其他维度组合来执行。 在一种设计中,可以为多个子带上的多个空间信道确定空间状态信息。 空间信道可以对应于不同的天线,不同的预编码向量等。可以为多个子带上的多个空间信道获得信道质量指示符(CQI)值。 CQI值可以在多个空间信道和多个子带之间进行差分编码,以获得差分CQI信息。 在另一种设计中,可以在多个时间间隔中对多个子带上的多个空间信道获得CQI值,并且可以在空间,频率和时间之间进行差分编码。 差分CQI信息和空间状态信息可以作为反馈发送。