论文标题
与双偏置天线的大量MIMO的下行光谱效率
Downlink Spectral Efficiency of Massive MIMO with Dual-Polarized Antennas
论文作者
论文摘要
本文考虑了基站和用户的双极性天线的单细胞大型MIMO（多输入多输出）系统的下行链路。我们考虑了一个通道模型，该模型考虑了利用双极化时出现的几个实际方面，例如通道跨极歧视（XPD）和交叉极接收和传输相关性（XPC）。我们得出了此模型的最小平方误差（MMSE）通道估计器的统计属性。使用这些估计值对最大比率预编码，得出了严格的闭合链路光谱效率（SE）表达。我们比较了在数值的双偏振和单极化设置中获得的SES，并评估XPD对下行链路SE的影响。
This paper considers the downlink of a single-cell massive MIMO (multiple-input multiple-output) system with dual-polarized antennas at both the base station and users. We consider a channel model that takes into account several practical aspects that arise when utilizing dual polarization, such as channel cross-polar discrimination (XPD) and cross-polar receive and transmit correlations (XPC). We derive the statistical properties of the minimum mean squared error (MMSE) channel estimator for this model. Using these estimates for maximum ratio precoding, a rigorous closed-form downlink spectral efficiency (SE) expression is derived. We compare the SEs achieved in dual-polarized and uni-polarized setups numerically and evaluate the impact of XPD on the downlink SE.
