The fifth generation (5G) wireless communication networks are being deployed worldwide
from 2020 and more capabilities are in the process of being standardized, such as mass …

Future wireless systems are envisioned to create an endogenously holography-capable,
intelligent, and programmable radio propagation environment, that will offer unprecedented …

What will 5G be? What it will not be is an incremental advance on 4G. The previous four
generations of cellular technology have each been a major paradigm shift that has broken …

A Cell-Free Massive MIMO (multiple-input multiple-output) system comprises a very large
number of distributed access points (APs), which simultaneously serve a much smaller …

Multi-user MIMO offers big advantages over conventional point-to-point MIMO: it works with
cheap single-antenna terminals, a rich scattering environment is not required, and resource …

New research directions will lead to fundamental changes in the design of future fifth
generation (5G) cellular networks. This article describes five technologies that could lead to …

Written by pioneers of the concept, this is the first complete guide to the physical and
engineering principles of Massive MIMO. Assuming only a basic background in …

A multiplicity of autonomous terminals simultaneously transmits data streams to a compact
array of antennas. The array uses imperfect channel-state information derived from …

Densification of network base stations is indispensable to achieve the stringent Quality of
Service (QoS) requirements of future mobile networks. However, with a dense deployment of …

We consider the cell-free massive multiple-input multiple-output (MIMO) downlink, where a
very large number of distributed multiple-antenna access points (APs) serve many single …