179 citations · 534 across the 33 of their papers we have counts for
6 papers · 1 filter
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…
A Hybrid Architecture for Federated and Centralized Learning
Ahmet M. Elbir, Sinem Coleri, Anastasios K. Papazafeiropoulos +2
Many of the machine learning tasks rely on centralized learning (CL), which requires the transmission of local datasets from the clients to a parameter server (PS) entailing huge c…
Terahertz-Band Joint Ultra-Massive MIMO Radar-Communications: Model-Based and Model-Free Hybrid Beamforming
Ahmet M. Elbir, Kumar Vijay Mishra, Symeon Chatzinotas
Wireless communications and sensing at terahertz (THz) band are increasingly investigated as promising short-range technologies because of the availability of high operational band…
Federated Dropout Learning for Hybrid Beamforming With Spatial Path Index Modulation In Multi-User mmWave-MIMO Systems
Ahmet M. Elbir, Sinem Coleri, Kumar Vijay Mishra
Millimeter wave multiple-input multiple-output (mmWave-MIMO) systems with small number of radio-frequency (RF) chains have limited multiplexing gain. Spatial path index modulation…
Federated Learning for Physical Layer Design
Ahmet M. Elbir, Anastasios K. Papazafeiropoulos, Symeon Chatzinotas
Model-free techniques, such as machine learning (ML), have recently attracted much interest towards the physical layer design, e.g., symbol detection, channel estimation, and beamf…
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…