This paper presents an iterative detection and de-coding scheme along with an adaptive
strategy to improve the selection of access points (APs) in a grant-free uplink cell-free …

In this paper, an effective pilot assignment algorithm is proposed to counter the pilot
contamination (PC) issue caused by limited pilot sequences during massive access in a …

In this paper, we consider the downlink of a multi-user multiple-input-multiple-output system
operating at the millimeter wave band in an outdoor environment. In this band, receive …

How to meet the demand for increasing number of users, higher data rates, and stringent
quality-of-service (QoS) in the beyond fifth-generation (B5G) networks? Cell-free massive …

Massive MIMO systems offer a high spatial resolution that can drastically increase the
spectral and/or energy efficiency by employing a large number of antennas at the base …

Massive multiple-input and multiple-output is widely considered as a key enabler of the next
generation 5G networks. With a large number of antennas at the base station, both spectral …

This paper provides a review of user selection algorithms for massive multiple-input multiple-
output (MIMO) systems under the line-of-sight (LoS) propagation model. Although the LoS …

In beam-based massive multiple-input multiple-output systems, signals are processed
spatially in the radio-frequency (RF) front end and thereby the number of RF chains can be …

Beam selection aims to select beams with large power and little inter‐user interference (IUI).
In wireless communication scenarios, the levels of IUI are usually different, but, most existing …

Cell-Free Massive Multiple-input Multiple-output (mMIMO) consists of many access points
(APs) in a coverage area that jointly serve the users. These systems can significantly reduce …