中文摘要：

提出了一种多用户MIMO下行链路中基于收发双方共同预测信道的信道信息反馈机制。在实际传输时,基站和用户双方采用相同的算法预测信道,用户将信道预测值和真实值之差,通过离线设计好的LBG码本进行量化,将码本序号反馈给基站。该方案中,利用实测的大样本信道采样值,以均值意义下的预测误差最小化为目标,采用LBG算法设计了量化码本。基站根据用户反馈的码本序号和自己实时的信道预测值,重建出接近真实信道的估计值,并利用该估计值对传输数据做预编码。仿真结果验证了所提方法的有效性。

英文摘要：

This paper investigates a CSI feedback scheme in multi-user MIMO system.In the proposed scheme,base station and user equipments predict channel vectors.Users only quantize and feedback the error between predictive value and real value of channel.In codebook design,LBG algorithm is used,with the objective function of minimizing the mean value of prediction error.BS uses the quantized error index and its own predictive value to reconstruct the real time channels.Numerical results verify its priority.