DropNet: An improved dropping algorithm based on neural networks for line-of-sight massive MIMO

A Farsaei, A Sheikh, U Gustavsson, A Alvarado… - IEEE …, 2021 - ieeexplore.ieee.org
In line-of-sight massive MIMO, the downlink channel vectors of few users may become
highly correlated. This high correlation limits the sum-rates of systems employing linear …

An improved successive filter-based dropping algorithm for massive MIMO with max-min power control

A Farsaei, U Gustavsson, A Alvarado… - IEEE …, 2021 - ieeexplore.ieee.org
In line-of-sight massive MIMO, there are use cases where the channel vectors of some users
become highly correlated. Highly correlated users lead to a large reduction in the sum-rate …

An improved dropping algorithm for line-of-sight massive MIMO with max-min power control

A Farsaei, A Alvarado, FMJ Willems… - IEEE …, 2019 - ieeexplore.ieee.org
In line-of-sight massive MIMO, there is a nonnegligible probability that two users become
highly correlated, which leads to a reduction in the achievable sum-rates of linear precoders …

An improved dropping algorithm for line-of-sight massive MIMO with Tomlinson–Harashima precoding

A Farsaei, A Alvarado, FMJ Willems… - IEEE …, 2019 - ieeexplore.ieee.org
One of the problems in line-of-sight massive MIMO is that a few users can have correlated
channel vectors. To alleviate this problem, a dropping algorithm has been proposed in the …

User selection for massive MIMO under line-of-sight propagation

RS Chaves, MVS Lima, E Cetin… - IEEE Open Journal of …, 2022 - ieeexplore.ieee.org
This paper provides a review of user selection algorithms for massive multiple-input multiple-
output (MIMO) systems under the line-of-sight (LoS) propagation model. Although the LoS …

A low-complexity hybrid linear and nonlinear precoder for line-of-sight massive MIMO with max-min power control

A Farsaei, U Gustavsson, A Alvarado… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
In line-of-sight (LOS) massive MIMO, there is a nonnegligible probability that the channel
vectors of some users become correlated. In these correlated scenarios, nonlinear …

No downlink pilots are needed in TDD massive MIMO

HQ Ngo, EG Larsson - IEEE Transactions on Wireless …, 2017 - ieeexplore.ieee.org
We consider the Massive Multiple-Input Multiple-Output downlink with maximum-ratio and
zero-forcing processing and time-division duplex operation. To decode, the users must know …

Downlink training in cell-free massive MIMO: A blessing in disguise

G Interdonato, HQ Ngo, P Frenger… - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
Cell-free Massive MIMO (multiple-input multiple-output) refers to a distributed Massive MIMO
system where all the access points (APs) cooperate to coherently serve all the user …

Utility-based downlink pilot assignment in cell-free massive MIMO

G Interdonato, P Frenger… - WSA 2018; 22nd …, 2018 - ieeexplore.ieee.org
We propose a strategy for orthogonal downlink pilot assignment in cell-free massive MIMO
(multiple-input multipleoutput) that exploits knowledge of the channel state information, the …

Enhanced normalized conjugate beamforming for cell-free massive MIMO

G Interdonato, HQ Ngo… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
In cell-free massive multiple-input multiple-output (MIMO) the fluctuations of the channel
gain from the access points to a user are large due to the distributed topology of the system …