多用户STBC下行链路预处理优化算法

An optimized downlink precoding algorithm for multiuser STBC system

给出了一种基于天线选择的多用户STBC下行链路预处理优化算法。该方法对发送端天线进行组合,即从所有发送天线中选出部分天线组成多个天线集合,每个天线集合中发送天线个数为能够获得空间分集增益的最小数目,从这些天线集合中选出最大化多用户STBC系统分集增益的一个集合作为最终发送天线。对基于天线选择的算法进行了仿真分析,结果表明,该算法比未采用选择的算法可以获得更高的分集增益,还与基于特征模式选择的算法进行了比较,结果表明:该方法比基于特征模式选择的算法使系统获得了更高的性价比。

An optimized downlink precoding algorithm, which based on transmit antenna selection, is proposed for multiuser STBC system. Antenna selection refers to choosing a subset of available antennas from the base station antenna pool and switching them to the available RF units. The proposed antenna selection is based on the maximizing of the spatial diversity of the precoded multiuser STBC system. The numerical results show that the proposed algorithm achieves a higher diversity with no selection algorithm and a higher performance to price ratio with eigenmode selection algorithm.