论文标题
无链路无单元的大型MIMO网络的电力控制和访问点调度的联合设计
Joint Design of Power Control and Access Point Scheduling for Uplink Cell-Free Massive MIMO Networks
论文作者
论文摘要
这项工作提出了一个无链路单元格的大量多输入多输出（CF-MMIMO）网络的联合功率控制和访问点（APS）调度算法，而无需通道硬化假设。假设通道硬化，已经对关节优化问题进行了广泛的研究。但是，据报道，在某些CF-MIMO环境中可能无法验证通道硬化。特别是，基于频道硬化的现有使用和验证（UATF）通常会严重低估CF-MMIMO中的用户速率。因此，对于准确的绩效估计，一种不诉诸通道硬化的新绩效评估技术是必不可少的。在此激励的情况下，我们提出了一个新的限制，以实现上行链路CF-MIMO的可实现速度。已经证明，所提出的界限提供了比现有UATF结合的CF-MMIMO的更准确的性能估计。拟议的结合还使我们能够开发一个联合功率控制，并在提高公平性和减少APS和中央处理单元（CPU）之间的资源（CPU）方面，计划算法计划算法。我们对使用拟议和现有算法设计的系统进行了广泛的性能评估和比较。比较表明，即使在APS和CPU之间的资源降低，该算法也可以通过拟议的算法实现可观的性能提高。
This work proposes a joint power control and access points (APs) scheduling algorithm for uplink cell-free massive multiple-input multiple-output (CF-mMIMO) networks without channel hardening assumption. Extensive studies have done on the joint optimization problem assuming the channel hardening. However, it has been reported that the channel hardening may not be validated in some CF-mMIMO environments. In particular, the existing Use-and-then-Forget (UatF) bound based on the channel hardening often seriously underestimates user rates in CF-mMIMO. Therefore, a new performance evaluation technique without resorting to the channel hardening is indispensable for accurate performance estimations. Motivated by this, we propose a new bound on the achievable rate of uplink CF-mMIMO. It is demonstrated that the proposed bound provides a more accurate performance estimate of CF-mMIMO than that of the existing UatF bound. The proposed bound also enables us to develop a joint power control and APs scheduling algorithm targeting at both improving fairness and reducing the resource between APs and a central processing unit (CPU). We conduct extensive performance evaluations and comparisons for systems designed with the proposed and existing algorithms. The comparisons show that a considerable performance improvement is achievable with the proposed algorithm even at reduced resource between APs and CPU.
