992 citations · 5k across the 82 of their papers we have counts for
16 papers · 1 filter
Centralized and Distributed Power Allocation for Max-Min Fairness in Cell-Free Massive MIMO
Sucharita Chakraborty, Emil Björnson, Luca Sanguinetti
Cell-free Massive MIMO systems consist of a large number of geographically distributed access points (APs) that serve users by coherent joint transmission. Downlink power allocatio…
Cramér-Rao Bounds for Holographic Positioning
Antonio A. D'Amico, Andrea de Jesus Torres, Luca Sanguinetti +1
Multiple antennas arrays play a key role in wireless networks for communications but also for localization and sensing applications. The use of large antenna arrays at high carrier…
Pilot Decontamination Processing in Cell-Free Massive MIMO
Alberto Alvarez Polegre, Luca Sanguinetti, Ana Garcia Armada
This letter focuses on the pilot contamination problem in the uplink and downlink of cell-free massive multiple-input multiple-output networks with different degrees of cooperation…
A Primer on Near-Field Beamforming for Arrays and Reconfigurable Intelligent Surfaces
Emil Björnson, Özlem Tugfe Demir, Luca Sanguinetti
Wireless communication systems have almost exclusively operated in the far-field of antennas and antenna arrays, which is conventionally characterized by having propagation distanc…
Nyquist-Sampling and Degrees of Freedom of Electromagnetic Fields
Andrea Pizzo, Andrea de Jesus Torres, Luca Sanguinetti +1
A signal space approach is presented to study the Nyquist sampling, number of degrees of freedom and reconstruction of an electromagnetic field under arbitrary scattering condition…
Channel Modeling and Channel Estimation for Holographic Massive MIMO with Planar Arrays
Özlem Tuğfe Demir, Emil Björnson, Luca Sanguinetti
In a realistic wireless environment, the multi-antenna channel usually exhibits spatially correlation fading. This is more emphasized when a large number of antennas is densely dep…
Foundations of User-Centric Cell-Free Massive MIMO
Özlem Tuğfe Demir, Emil Björnson, Luca Sanguinetti
Imagine a coverage area where each mobile device is communicating with a preferred set of wireless access points (among many) that are selected based on its needs and cooperate to…
Cell-free Massive MIMO with Short Packets
Alejandro Lancho, Giuseppe Durisi, Luca Sanguinetti
In this paper, we adapt to cell-free Massive MIMO (multiple-input multiple-output) the finite-blocklength framework introduced by Östman et al. (2020) for the characterization of t…
Wavenumber-Division Multiplexing in Line-of-Sight Holographic MIMO Communications
Luca Sanguinetti, Antonio A. D'Amico, Merouane Debbah
Starting from first principles of wave propagation, we consider a multiple-input multiple-output (MIMO) representation of a communication system between two spatially-continuous vo…
Electromagnetic Interference in RIS-Aided Communications
Andrea De Jesus Torres, Luca Sanguinetti, Emil Björnson
The prospects of using a reconfigurable intelligent surface (RIS) to aid wireless communication systems have recently received much attention. Among the different use cases, the mo…
Utility-Based Precoding Optimization Framework for Large Intelligent Surfaces
Emil Björnson, Luca Sanguinetti
The spectral efficiency of wireless networks can be made nearly infinitely large by deploying many antennas, but the deployment of very many antennas requires new topologies beyond…
Fourier Plane-Wave Series Expansion for Holographic MIMO Communications
Andrea Pizzo, Luca Sanguinetti, Thomas L. Marzetta
Imagine a MIMO communication system that fully exploits the propagation characteristics offered by an electromagnetic channel and ultimately approaches the limits imposed by wirele…
Cramér-Rao Bounds for Near-Field Localization
Andrea De Jesus Torres, Antonio Alberto D'Amico, Luca Sanguinetti +1
Multiple antenna arrays play a key role in wireless networks for communications but also localization and sensing. The use of large antenna arrays pushes towards a propagation regi…
Cell-Free Massive MIMO with Large-Scale Fading Decoding and Dynamic Cooperation Clustering
Özlem Tuğfe Demir, Emil Björnson, Luca Sanguinetti
This paper considers the uplink of user-centric cell-free massive MIMO (multiple-input multiple-output) systems. We utilize the user-centric dynamic cooperation clustering (DCC) fr…
Spatial Characterization of Electromagnetic Random Channels
Andrea Pizzo, Luca Sanguinetti, Thomas L. Marzetta
The majority of stochastic channel models rely on the electromagnetic far-field assumption, which allows to decompose the channel in terms of plane waves. The far-field assumption…
Reconfigurable Intelligent Surfaces: A Signal Processing Perspective With Wireless Applications
Emil Björnson, Henk Wymeersch, Bho Matthiesen +3
Antenna array technology enables directional transmission and reception of wireless signals, for communications, localization, and sensing purposes. The signal processing algorithm…