中文摘要：

在下行多用户多输入多输出（MU-MIMO）场景下,针对时分双工增强高速分组接入系统的调制编码方式（MCS）选择不准确的问题,提出了一种综合考虑多用户干扰和信道时变特性的调制编码方式选择算法.通过调度用户前次上行传输的信道估计,对用户反馈的信道质量指示（CQI）进行调整,再进行调制编码方式选择.该算法不需增加信令开销,基站运算复杂度低.仿真结果表明,在用户间干扰比较严重时,算法系统性能增益明显.

英文摘要：

For the downlink multi-user multiple input multiple output（MU-MIMO） scenario,in order to improve the accuracy of modulation and coding scheme（MCS） in time division high speed packet access plus system,an enhanced MCS selection algorithm is presented.By taking account of the channel estimation for the last uplink transmission,a appropriate MCS is selected after adjusting the feedback channel quality indicator（CQI）.This algorithm takes advantages of no additional controlling signaling and low computational complexity.Simulation shows that significant performance enhancement can be achieved by this algorithm when UE experiences severe inter-user interference.