992 citations · 5k across the 82 of their papers we have counts for
78 papers · 1 filter
Towards 6G MIMO: Massive Spatial Multiplexing, Dense Arrays, and Interplay Between Electromagnetics and Processing
Emil Björnson, Chan-Byoung Chae, Robert W. Heath +7
The increasing demand for wireless data transfer has been the driving force behind the widespread adoption of Massive MIMO (multiple-input multiple-output) technology in 5G. The ne…
Holographic MIMO Communications: What is the benefit of closely spaced antennas?
Antonio Alberto D'Amico, Luca Sanguinetti
Holographic MIMO refers to a (possibly large) array with a large number of individually controlled and densely deployed antennas. The objective of this paper is to provide further…
DFT-Based Channel Estimation for Holographic MIMO
Antonio Alberto D'Amico, Giacomo Bacci, Luca Sanguinetti
Holographic MIMO (hMIMO) systems with a massive number of individually controlled antennas N make minimum mean square error (MMSE) channel estimation particularly challenging, due…
Spherical Wavefronts Improve MU-MIMO Spectral Efficiency When Using Electrically Large Arrays
Giacomo Bacci, Luca Sanguinetti, Emil Björnson
Modern MIMO communication systems are almost exclusively designed under the assumption of locally plane wavefronts over antenna arrays. This is known as the far-field approximation…
Formation-of-Arrays Antenna Technology for High-Throughput Mobile Non-Terrestrial Networks
Giacomo Bacci, Riccardo De Gaudenzi, Marco Luise +2
Effective integration of terrestrial and non-terrestrial segments is one of the key research avenues in the design of current and future wireless communication networks. To this ai…
Cell-Free Massive MIMO for URLLC: A Finite-Blocklength Analysis
Alejandro Lancho, Giuseppe Durisi, Luca Sanguinetti
We present a general framework for the characterization of the packet error probability achievable in cell-free Massive multiple-input multiple output (MIMO) architectures deployed…
Cooperative Hybrid Networks with Active Relays and RISs for B5G: Applications, Challenges, and Research Directions
Zaid Abdullah, Steven Kisseleff, Wallace Alves Martins +6
Among the recent advances and innovations in wireless technologies, reconfigurable intelligent surfaces (RISs) have received much attention and are envisioned to be one of the enab…
Mitigating Intra-Cell Pilot Contamination in Massive MIMO: A Rate Splitting Approach
Anup Mishra, Yijie Mao, Christo Kurisummoottil Thomas +2
Massive multiple-input multiple-output (MaMIMO) has become an integral part of the fifth-generation (5G) standard, and is envisioned to be further developed in beyond 5G (B5G) netw…
Performance analysis of WDM in LoS communications with arbitrary orientation and position
Antonio Alberto D'Amico, Luca Sanguinetti, Merouane Debbah
This letter considers the wavenumber-division-multiplexing (WDM) scheme that was recently proposed in [1] for line-of-sight communications between parallel (side-by-side) spatially…
Intelligent Reconfigurable Surfaces vs. Decode-and-Forward: What is the Impact of Electromagnetic Interference?
Andrea De Jesus Torres, Luca Sanguinetti, Emil Björnson
This paper considers the use of an intelligent reconfigurable surface (IRS) to aid wireless communication systems. The main goal is to compare this emerging technology with convent…
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…
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…
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…
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…
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…
Holographic MIMO Communications Under Spatially-Stationary Scattering
Andrea Pizzo, Thomas Marzetta, Luca Sanguinetti
Holographic MIMO is a spatially-constrained MIMO system with a massive number of antennas, possibly thought of, in its ultimate form, as a spatially-continuous electromagnetic aper…
URLLC with Massive MIMO: Analysis and Design at Finite Blocklength
Johan Östman, Alejandro Lancho, Giuseppe Durisi +1
The fast adoption of Massive MIMO for high-throughput communications was enabled by many research contributions mostly relying on infinite-blocklength information-theoretic bounds.…
Rayleigh Fading Modeling and Channel Hardening for Reconfigurable Intelligent Surfaces
Emil Björnson, Luca Sanguinetti
A realistic performance assessment of any wireless technology requires the use of a channel model that reflects its main characteristics. The independent and identically distribute…
Outage Analysis of Downlink URLLC in Massive MIMO systems with Power Allocation
Alexandru-Sabin Bana, Luca Sanguinetti, Elisabeth De Carvalho +1
Massive MIMO is seen as a main enabler for low latency communications, thanks to its high spatial degrees of freedom. The channel hardening and favorable propagation properties of…