Multiple access (MA) is a crucial part of any wireless system and refers to techniques that
make use of the resource dimensions to serve multiple users/devices/machines/services …

Mathematical optimization is now widely regarded as an indispensable modeling and
solution tool for the design of wireless communications systems. While optimization has …

This chapter presents the theory and algorithms for a covariance‐based approach for device
activity detection in a grant‐free random access protocol. We consider the device activity …

This paper investigates the unsourced random access (URA) problem with a massive
multiple-input multiple-output receiver that serves wireless devices in the near-field of …

Activity detection is an important task in the next generation grant-free multiple access. While
there are a number of existing algorithms designed for this purpose, they mostly require …

Although grant‐free random access (RA) is a promising uplink access mechanism for
massive machine‐type communications, its potential has yet to be fully unleashed …

This paper addresses the joint user identification and channel estimation (JUICE) problem in
machine-type communications under the practical spatially correlated channels model with …

In this paper, we propose an online federated learning framework with massive random
access, aiming to learn a sequence of global models using local data that are sequentially …

Compared to the generations up to 4G, whose main focus was on broadband and coverage
aspects, 5G has expanded the scope of wireless cellular systems towards embracing two …

Reconfigurable intelligent surface (RIS) has been recently regarded as a disruptive
candidate technology for enabling next generation wireless communication. It can establish …