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

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 …

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

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 …

We study the impact of channel aging on the uplink of a cell-free (CF) massive multiple-input
multiple-output (mMIMO) system by considering i) spatially-correlated Rician-faded …

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

This paper investigates the generalized linear system (GLS), widely employed to evaluate
the impact of nonlinear preprocessing on wireless transceivers. Two state-of-the-art signal …

This paper provides a solution for the activity detection and channel estimation problem in
grant-free access with correlated device activity patterns. In particular, we consider a …

Grant-free random access is an effective technology for enabling low-overhead and low-
latency massive access, where joint activity detection and channel estimation (JADCE) is a …

The rapid evolution of wireless technology has led to the emergence of new use cases and
the deployment of various types of communication devices across broad geographic areas …