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LIMITED CHANNEL INFORMATION FEEDBACK ERROR-FREE CHANNEL VECTOR QUANIZATION SCHEME FOR PRECODING MU-MIMO
LIMITED CHANNEL INFORMATION FEEDBACK ERROR-FREE CHANNEL VECTOR QUANIZATION SCHEME FOR PRECODING MU-MIMO
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机译:用于预编码MU-MIMO的有限信道信息反馈无错信道矢量量化方案
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摘要
A multiuser downlink multiple-input multiple-output (MIMO) system with limited channel information feedback includes an error-free channel vector quantization scheme. Each user has multiple antennas, and the base station includes a matching number of antennas. Each MIMO channel is measured at the terminus end of a corresponding user, and used to obtain the channel state information at the receiver (CSIR). A few data bits of CSIR information are feed back to the base station through the limited feedback channels. The base station collects all these CSIR feedback data bits into a CSI at the transmitter (CSIT). The CSIT is used to determine which users are served, and how to configure a corresponding multi-user precoder. The user data channels will later all be transmitted through such precoder. A codebook of channel quantization vectors is pre-defined and distributed amongst the base station and all the users.
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