The recent extra-large scale massive multiple-input multiple-output (XL-MIMO) systems are
seen as a promising technology for providing very high data rates in high user-density …

In machine-type communication (MTC), massive access attempts are generated and the
massive MIMO is the key technology to support this demand. To support massive MTC …

Extra-large massive multiple-input multiple-output (XL-MIMO) systems is a new concept,
where spatial non-stationarities allow activate a high number of user equipments (UEs). This …

This article focuses on conceiving a random access (RA) protocol able to provide
connections for a vast number of devices subject to intensive collisions in an extralarge …

The massive multiple-input multiple-output (MIMO) technology has great potential to
manage the rapid growth of wireless data traffic. Massive MIMO achieves tremendous …

Ensuring that the quality-of-service (QoS) requirements are satisfied in wireless
communications systems with high user density is challenging due to the limitations on the …

In this paper, we investigate multi-user modular extremely large-scale multiple-input multiple-
output (XL-MIMO) communication systems, where modular extremely large-scale uniform …

The grant-free random access (RA) can minimize the access delay but also brings severe
data transmission interferences. To overcome this defect, we propose a new RA scheme that …

Extremely large-scale multiple-input multiple-output (XL-MIMO) is capable of supporting
extremely high system capacities with large numbers of users. In this work, we build a …

With the inherent benefits, such as, better cell coverage and higher area throughput, extra-
large scale massive multiple-input multiple-output (MIMO) has great potential to be one of …