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    • 59. 发明授权
    • Multi-user MIMO feedback and transmission in a wireless communication system
    • 无线通信系统中的多用户MIMO反馈和传输
    • US07649831B2
    • 2010-01-19
    • US11979266
    • 2007-10-31
    • Cornelius Van RensburgJianzhong ZhangFarooq Khan
    • Cornelius Van RensburgJianzhong ZhangFarooq Khan
    • H04J11/00
    • H04B7/0639H04B7/0478H04B7/065H04L1/0003H04L1/0009H04L1/0026H04L1/0029H04L1/06H04L25/03343H04L27/2601H04L2001/0093
    • The present invention provides a method for feedback and transmission of multi-user (MU) multiple input multiple output (MIMO) in a wireless communication system. The method includes steps of selecting subset codebook or full code book based on traffic load of a base station, and broadcasting the selected codebook to user equipments. In high traffic load, subset codebook is selected, and in low traffic load, full codebook is selected. User stations calculated a channel quality indicator of a spatial codeword vector that is included in the selected codebook. Information of the maximum channel quality indicator is sent to the base station together with a precoder of the user equipment. The base station selects user equipments based on the information of the maximum channel quality indicator and precoder, and transmits precoder signal and data signal to the user equipments. The present invention also provides a system for the base station that causes the base station to perform the above mentioned operations.
    • 本发明提供了一种在无线通信系统中反馈和传输多用户(MU)多输入多输出(MIMO)的方法。 该方法包括基于基站的业务负载选择子码本或全码本,并将所选码本广播给用户设备的步骤。 在高流量负载下,选择子码本,在低流量负载下,选择完整的码本。 用户站计算包含在所选码本中的空间码字矢量的信道质量指示符。 最大信道质量指示符的信息与用户设备的预编码器一起发送到基站。 基站根据最大信道质量指示符和预编码器的信息选择用户设备,并向用户设备发送预编码信号和数据信号。 本发明还提供一种使基站执行上述操作的基站的系统。