16 citations · 26 across the 5 of their papers we have counts for
8 papers
Coverage Probability of Double-IRS Assisted Communication Systems
Anastasios Papazafeiropoulos, Pandelis Kourtessis, Symeon Chatzinotas +1
In this paper, we focus on the coverage probability of a double-intelligent reflecting surface (IRS) assisted wireless network and study the impact of multiplicative beamforming ga…
Scalable Cell-Free Massive MIMO Systems: Impact of Hardware Impairments
Anastasios Papazafeiropoulos, Emil Björnson, Pandelis Kourtessis +2
Standard cell-free (CF) multiple-input-multiple-output (mMIMO) systems is a promising technology to cover the demands for higher data rates in fifth-generation (5G) networks and be…
Multipair Two-Way DF Relaying with Cell-Free Massive MIMO
Anastasios K. Papazafeiropoulos, Pandelis Kourtessis, Symeon Chatzinotas +1
We consider a two-way half-duplex decode-and-forward (DF) relaying system with multiple pairs of single-antenna users assisted by a cell-free (CF) massive multiple-input multiple-o…
Coverage Probability of Distributed IRS Systems Under Spatially Correlated Channels
Anastasios Papazafeiropoulos, Cunhua Pan, Ahmet Elbir +3
This paper suggests the use of multiple distributed intelligent reflecting surfaces (IRSs) towards a smarter control of the propagation environment. Notably, we also take into acco…
Intelligent Reflecting Surface-assisted MU-MISO Systems with Imperfect Hardware: Channel Estimation, Beamforming Design
Anastasios Papazafeiropoulos, Cunhua Pan, Pandelis Kourtessis +2
Most works in IRS-assisted systems have ignored the impact of the inevitable residual hardware impairments (HWIs) at both the transceiver hardware and the IRS while any relevant wo…
Performance Analysis of Cell-Free Massive MIMO Systems: A Stochastic Geometry Approach
Anastasios Papazafeiropoulos, Pandelis Kourtessis, Marco Di Renzo +2
Cell-free (CF) massive multiple-input-multiple-output (MIMO) has emerged as an alternative deployment for conventional cellular massive MIMO networks. Prior works relied on the str…
Towards Optimal Energy Efficiency in Cell-Free Massive MIMO Systems
Anastasios Papazafeiropoulos, Hien Q. Ngo, Pandelis Kourtessis +2
Motivated by the ever-growing demand for \emph{green} wireless communications and the advantages of \emph{cell-free} (CF) massive multiple-input multiple-output (MIMO) systems, we…
SDN-enabled MIMO Heterogeneous Cooperative Networks with Flexible Cell Association
Anastasios Papazafeiropoulos, Pandelis Kourtessis, Marco Di Renzo +2
Small-cell densification is a strategy enabling the offloading of users from macro base stations (MBSs), in order to alleviate their load and increase the coverage, especially, for…