论文标题
最近的大型MIMO架构技术的高级比较
A High-Level Comparison of Recent Technologies for Massive MIMO Architectures
论文作者
论文摘要
自从引入大型MIMO(MMIMO)以来,具有可行复杂性的收发器的设计一直是一个挑战性的问题。最初,人们认为这方面的主要问题是整体RF成本。但是,随着MMIMO越来越成为未来无线网络的关键技术,人们已经意识到,RF-COST只是许多实施挑战和设计权衡中的一种。在本文中,考虑到最近的新兴技术,例如智能的表面辅助和基于Rotman镜头的架构,我们介绍,分析和比较各种新型MMIMO架构。将这些与常规的全数字(FD)和混合模拟数字波束(HADB)方法进行比较。为了进行公平的比较,我们说明了各种硬件缺陷和损失,并利用一种新颖的通用算法进行信号预码。根据我们的彻底调查,我们为各种MMIMO架构的质量折衷提出了一般的效率。我们发现,在典型的蜂窝通信设置基于反射/传输阵列的体系结构绘制最佳总体权衡。此外,我们表明,在定性排名中,所考虑的体系结构的功率效率与频率范围无关。
Since the introduction of massive MIMO (mMIMO), the design of a transceiver with feasible complexity has been a challenging problem. Initially, it was believed that the main issue in this respect is the overall RF-cost. However, as mMIMO is becoming more and more a key technology for future wireless networks, it is realized, that the RF-cost is only one of many implementational challenges and design trade-offs. In this paper, we present, analyze and compare various novel mMIMO architectures, considering recent emerging technologies such as intelligent surface-assisted and Rotman lens based architectures. These are compared to the conventional fully digital (FD) and hybrid analog-digital beamforming (HADB) approaches. To enable a fair comparison, we account for various hardware imperfections and losses and utilize a novel, universal algorithm for signal precoding. Based on our thorough investigations, we draw a generic efficiency to quality trade-off for various mMIMO architectures. We find that in a typical cellular communication setting the reflect/transmit array based architectures sketch the best overall trade-off. Further, we show that in a qualitative ranking the power efficiency of the considered architectures is independent of the frequency range.