论文标题
通道图表辅助飞行员重用，用于具有空间相关的通道的大规模MIMO系统
Channel Charting Aided Pilot Reuse for Massive MIMO Systems with Spatially Correlated Channels
论文作者
论文摘要
大量的多输入多输出（MMIMO）技术是提高机器型通信（MTC）光谱效率的一种方法。为了利用大型天线阵列的好处，需要通过试点信号进行准确的通道估计。由于大量连接的设备数量，大规模的MTC系统无法避免飞行员重复使用。我们提出了一种基于通道图（CC）的飞行员重用算法，以减轻具有空间相关通道的多扇区单细胞大规模MTC系统中的飞行员污染。我们表明，通过CC创建干扰图后，可以实现分配试验序列的简单策略。仿真结果表明，基于CC的飞行员重用策略提高了通道估计的精度，随后，与其他现有方案相比，它可以提高符号检测性能并提高频谱效率。此外，CC飞行员分配方法的性能方法是针对小型网络设置的详尽搜索试点分配。
Massive multiple-input multiple-output (mMIMO) technology is a way to increase the spectral efficiency of machine-type communications (MTC). To exploit the benefits from large antenna arrays, accurate channel estimation through pilot signals is needed. Massive MTC systems cannot avoid pilot reuse due to the enormous numbers of connected devices. We propose a pilot reuse algorithm based on channel charting (CC) to mitigate pilot contamination in a multi-sector single-cell massive MTC system having spatially correlated channels. We show that after creating an interference map via CC, a simple strategy to allocate the pilot sequences can be implemented. The simulation results show that the CC-based pilot reuse strategy improves channel estimation accuracy, which subsequently improves the symbol detection performance and increases the spectral efficiency compared to other existing schemes. Moreover, the performance of the CC pilot assignment method approaches that of exhaustive search pilot assignment for small network setups.
