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 …

In cell-free (CF) massive MIMO, a large number of access points (APs) distributed over the
coverage area jointly serve a set of users over the same time/frequency resources. In this …

Time-division-duplexing massive multiple-input multiple-output (MIMO) systems estimate the
channel state information (CSI) by leveraging the uplink-downlink channel reciprocity, which …

The integration of communication technologies is regarded as a potential direction of future
network. Combining cell-free massive multiple-input multiple-output (CF-mMIMO) with …

Abstract 5G New Radio (NR) operates in two frequency ranges viz. Frequency Range 1 (sub-
6 GHz band) and Frequency Range 2 (millimeter wave communication). It utilizes Time …

Channel mismatch, resulting from channel nonreciprocity (NRC) and channel aging, can
make the estimated channel outdated when used for precoding and detection. In this article …

This paper considers a hybrid beamforming massive multiple-input multiple-output (MIMO)
system operating in time-division duplex (TDD) mode. We investigate the combined impacts …

In this paper, we investigate the effect of power amplifier (PA) nonlinearity on a multi user
multiple-input multiple-output orthogonal frequency division multiplexing (MU-MIMO-OFDM) …

We consider the downlink of a multiuser system operating in the time-division duplexing
mode, for which base station (BS) and users are equipped with multiple antennas, and …

Full-dimension MIMO (FD-MIMO) using planar active antenna systems (AAS) is considered
a critical technology for fifth-generation (5G) cellular systems to improve network capacity …