44 citations · 145 across the 39 of their papers we have counts for
10 papers · 2 filters
Ergodic Capacity of IRS-Assisted MIMO Systems with Correlation and Practical Phase-Shift Modeling
Anastasios Papazafeiropoulos
We focus on the maximization of the exact ergodic capacity (EC) of a point-to-point multiple-input multiple-output (MIMO) system assisted by an intelligent reflecting surface (IRS)…
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…
Toward Autonomous Reconfigurable Intelligent Surfaces Through Wireless Energy Harvesting
Konstantinos Ntontin, Alexandros-Apostolos A. Boulogeorgos, Emil Björnson +9
In this work, we examine the potential of autonomous operation of a reconfigurable intelligent surface (RIS) using wireless energy harvesting from information signals. To this end,…
Asymptotic Analysis of Max-Min Weighted SINR for IRS-Assisted MISO Systems with Hardware Impairments
Anastasios Papazafeiropoulos, Cunhua Pan, Ahmet Elbir +3
We focus on the realistic maximization of the uplink minimum signal-to-interference-plus-noise ratio (SINR) of a general multiple-input single-output (MISO) system assisted by an i…
Uplink Performance Analysis of Cell-Free mMIMO Systems under Channel Aging
Ribhu Chopra, Chandra R. Murthy, Anastasios K. Papazafeiropoulos
In this paper, we investigate the impact of channel aging on the uplink performance of a cell-free~(CF) massive multiple-input multiple-output (mMIMO) system with a minimum mean sq…