Ultradense cell-free massive multiple-input multiple-output (CF-MMIMO) has emerged as a
promising technology expected to meet the future ubiquitous connectivity requirements and …

It is generally believed that downlink cell-free networks perform best under centralized
implementations where the local channel state information (CSI) acquired by the access …

We derive a novel uplink-downlink duality principle for optimal joint precoding design under
per-transmitter power and information constraints. The main application is to cell-free …

We consider unsourced random access (uRA) in a cell-free (CF) user-centric wireless
network, where a large number of potential users compete for a random access slot, while …

Reconfigurable intelligent surfaces (RISs) enable wireless communication in harsh
propagation conditions. In fact, when impinging on an RIS, wireless signals can be …

We consider fairness scheduling in a user-centric cell-free massive MIMO network, where L
remote radio units, each with M antennas, serve K≈LM user equipments (UEs). Recent …

Next-generation mobile networks require evolved radio access network (RAN) architectures
to meet the demands of high capacity, massive connectivity, reduced costs, and energy …

In the cooperative cellular network, relay-like base stations are connected to the central
processor (CP) via rate-limited fronthaul links and the joint processing is performed at the …

We reconsider the problem of joint power control and beamforming design to maximize the
weighted sum rate in large and potentially cell-free massive MIMO networks. In contrast to …

This study presents novel applications of fixed-point methods to solve previously open joint
power control and beamforming design problems in modern large-scale MIMO systems, eg …