论文标题
减轻大量MIMO中细胞内试验污染的速率分裂策略
A Rate Splitting Strategy for Mitigating Intra-Cell Pilot Contamination in Massive MIMO
论文作者
论文摘要
大型MIMO（Mamimo）系统的光谱效率（SE）受低质量通道估计的影响。速率分解（RS）最近对多源多个天线系统引起了一些兴趣，作为减轻由于不完善的通道状态信息而导致的多用户干扰的有效手段。本文研究了所有用户使用相同的试点序列进行频道估计时，研究了RS在单细胞Mamimo系统的下行中的好处。通过单层RS策略（依赖于每个用户端的单个连续干扰取消）在下行链路中实现的SE的新表达式被得出并用于设计预编码方案和通用和私人消息的功率分配策略。数值结果用于表明所提出的RS溶液可实现较高的光谱效率，而传统的Mamimo具有最大比率预编码。
The spectral efficiency (SE) of Massive MIMO (MaMIMO) systems is affected by low quality channel estimates. Rate-Splitting (RS) has recently gained some interest in multiuser multiple antenna systems as an effective means to mitigate the multi-user interference due to imperfect channel state information. This paper investigates the benefits of RS in the downlink of a single-cell MaMIMO system when all the users use the same pilot sequence for channel estimation. Novel expressions for the SE achieved in the downlink by a single-layer RS strategy (that relies on a single successive interference cancellation at each user side) are derived and used to design precoding schemes and power allocation strategies for common and private messages. Numerical results are used to show that the proposed RS solution achieves higher spectral efficiency that conventional MaMIMO with maximum ratio precoding.
