The envisioned sixth-generation (6G) of wireless communications is expected to give rise to
the necessity of connecting very large quantities of heterogeneous wireless devices, which …

Over the period, two significant advancements ie shrinking of the sensor size and improved
communication capability, lead the sensor-based internet-of-things (SBIoT) to mature …

Massive ultrareliable and low-latency communications (mURLLC) is an emerging and
dominate traffic service in 6G. To reduce the signaling overhead and access delay, grant …

We consider the problem of detecting active devices and estimating their channels in the
uplink of a massive machine type communication (mMTC) network. The base station (BS) in …

This paper focuses on the covariance-based activity detection problem in a multi-cell
massive multiple-input multiple-output (MIMO) system. In this system, active devices transmit …

Compressed sensing multi-user detection (CS-MUD) algorithms play a key role in optimizing
grant-free (GF) non-orthogonal multiple access (NOMA) for massive machine-type …

Cell-free massive multiple-input multiple-output (CF mMIMO) systems serve the user
equipments (UEs) by geographically distributed access points (APs) by means of joint …

This paper studies the user activity detection and channel estimation problem in a
temporally-correlated massive access system where a very large number of users …

This article considers the massive access problem in an uplink cell-free multiple-input–
multiple-output (MIMO) system where massive potential users communicate with a set of …

Wireless communication systems to date primarily rely on the orthogonality of resources to
facilitate the design and implementation, from user access to data transmission. Emerging …