论文标题
在空间相关的通道中密集的多细胞大型MIMO网络的光谱效率
Spectral Efficiency of Dense Multicell Massive MIMO Networks in Spatially Correlated Channels
论文作者
论文摘要
本文是在密集的多细胞多输入多输出（MIMO）的光谱效率（SE）上。通道在空间相关，并考虑了多斜率路径损耗模型。在我们的框架中，通道状态信息是通过使用试点序列获得的，并且BSS被随机部署。首先，随着BS密度的增加，我们研究了通道估计的准确性及其对SE的影响，并且网络致密。其次，我们考虑了不相关的通道的特殊情况，随机几何框架有助于我们简化SE表达式并获得天线 - EU-EU的最小值，而天线污染物的污染物是主导而不是细胞内和细胞内部干扰。最后，我们从多细胞处理方案以及BS密度的单细胞处理方案以及单细胞密度方面提供了一些有关空间相关通道所获得的SE的见解。我们的结果表明，虽然所有检测器都会导致BS密度的非进口SE，但随着网络的致密性，它们的面积呈指数增加。此外，我们得出的结论是，为了达到给定的SE，随着通道相关水平的增加，天线比率的要求值降低。
This paper is on the spectral efficiency (SE) of a dense multi-cell massive multiple-input multiple-output (MIMO). The channels are spatially correlated and the multi-slope path loss model is considered. In our framework, the channel state information is obtained by using pilot sequences and the BSs are deployed randomly. First, we study the channel estimation accuracy and its impact on the SE as the BS density increases and the network becomes densified. Second, we consider the special case of uncorrelated channels for which the stochastic geometry framework helps us to simplify the SE expressions and obtain the minimum value of antenna-UE ratio over which the pilot contamination is dominant rather than the inter- and intra-cell interference. Finally, we provide some insights into the obtained SE for the spatially correlated channels, from a multi-cell processing scheme as well as the single-cell ones in terms of the BS density. Our results show that while all the detectors result in non-increasing SE in terms of the BS density, their area SE increases exponentially as the network becomes densified. Moreover, we conclude that in order to achieve a given SE, the required value of antenna-UE ratio decreases as the level of channel correlation increases.
