论文标题
通道老化和试点污染的无细胞大型MIMO
Cell-Free Massive MIMO with Channel Aging and Pilot Contamination
论文作者
论文摘要
在本文中，我们研究了通道老化对具有试验污染的大量多输入多输出（MIMO）系统的无细胞（CF）性能的影响。要考虑到由于用户移动性而引起的通道老化效应，我们首先计算频道估计值。我们使用它来得出具有大规模褪色解码和匹配的过滤器接收器合作的CF大型MIMO系统上行链路光谱效率（SE）的新型闭路表达式。小型细胞系统的性能得出以进行比较。发现CF巨大的MIMO系统在低和高弹性条件下实现了更高的95 \％ - 可能的上行链路SE，并且CF大量MIMO对通道老化更强大。分数功率控制（FPC）被认为可以补偿以限制用户间干扰。结果表明，与全功率传输相比，随着通道老化的增长，FPC的好处逐渐减弱。
In this paper, we investigate the impact of channel aging on the performance of cell-free (CF) massive multiple-input multiple-output (MIMO) systems with pilot contamination. To take into account the channel aging effect due to user mobility, we first compute a channel estimate. We use it to derive novel closed-form expressions for the uplink spectral efficiency (SE) of CF massive MIMO systems with large-scale fading decoding and matched-filter receiver cooperation. The performance of a small-cell system is derived for comparison. It is found that CF massive MIMO systems achieve higher 95\%-likely uplink SE in both low- and high-mobility conditions, and CF massive MIMO is more robust to channel aging. Fractional power control (FPC) is considered to compensate to limit the inter-user interference. The results show that, compared with full power transmission, the benefits of FPC are gradually weakened as the channel aging grows stronger.
