This letter investigates the coverage probability for coordinated multipoint transmission in a
downlink two-tier heterogeneous network composed of macro base stations (BSs) and femto …

Massive multi‐input–multi‐output systems promise high data rates by using a large number
of antennas, which also increases the power usage of the system as a consequence. This …

As future networks aim to meet the ever-increasing requirements of high-data rate
applications, dense, and heterogeneous networks (HetNets) will be deployed to provide …

We provide explicit formulas for the optimal number of antennas per base station to
maximize the cell total energy efficiency of a power-controlled multi-cell Massive MIMO …

This letter focuses on the spectrum efficiency (SE) and energy efficiency (EE) of K-tier
heterogeneous networks (HetNets), in which massive multiple-input multiple-output (MIMO) …

Energy efficiency (EE) is becoming an important design goal for wireless communication
systems providing high spectral efficiency (SE). Both massive multi-input multi-output …

The nested array, implemented by nonuniform antenna placement, is an effective approach
to achieve O (N 2) degrees of freedom (DOF) with an antenna array of N antennas. Such …

Two key traits of 5G cellular networks are much higher base station (BS) densities-especially
in the case of low-power BSs-and the use of massive MIMO at these BSs. This paper …

In this paper, we investigate downlink power control in massive multiple-input multiple-
output (MIMO) networks with distributed antenna arrays. The base station (BS) in each cell …

Massive multi-input, multi-output (MIMO) systems are an exciting area of study and an
important technique for fifth-generation (5G) wireless networks that support high data rate …