258 citations · 1.2k across the 44 of their papers we have counts for
11 papers · 1 filter
Cooperative RIS and STAR-RIS assisted mMIMO Communication: Analysis and Optimization
Anastasios Papazafeiropoulos, Ahmet M. Elbir, Pandelis Kourtessis +2
Reconfigurable intelligent surface (RIS) has emerged as a cost-effective and promising solution to extend the wireless signal coverage and improve the performance via passive signa…
NEAT-MUSIC: Auto-calibration of DOA Estimation for Terahertz-Band Massive MIMO Systems
Ahmet M. Elbir, Abdulkadir Celik, Ahmed M. Eltawil
Terahertz (THz) band is envisioned for the future sixth generation wireless systems thanks to its abundant bandwidth and very narrow beamwidth. These features are one of the key en…
Spherical Wavefront Near-Field DoA Estimation in THz Automotive Radar
Ahmet M. Elbir, Kumar Vijay Mishra, Symeon Chatzinotas
Automotive radar at terahertz (THz) band has the potential to provide compact design. The availability of wide bandwidth at THz-band leads to high range resolution. Further, very n…
Near-field Hybrid Beamforming for Terahertz-band Integrated Sensing and Communications
Ahmet M. Elbir, Abdulkadir Celik, Ahmed M. Eltawil
Terahertz (THz) band communications and integrated sensing and communications (ISAC) are two main facets of the sixth generation wireless networks. In order to compensate the sever…
Terahertz-Band Direction Finding With Beam-Split and Mutual Coupling Calibration
Ahmet M. Elbir, Kumar Vijay Mishra, Symeon Chatzinotas
Terahertz (THz) band is currently envisioned as the key building block to achieving the future sixth generation (6G) wireless systems. The ultra-wide bandwidth and very narrow beam…
Sparse Array Design for Direction Finding using Deep Learning
Kumar Vijay Mishra, Ahmet M. Elbir, Koichi Ichige
In the past few years, deep learning (DL) techniques have been introduced for designing sparse arrays. These methods offer the advantages of feature engineering and low prediction-…
Antenna Selection With Beam Squint Compensation for Integrated Sensing and Communications
Ahmet M. Elbir, Asmaa Abdallah, Abdulkadir Celik +1
Next-generation wireless networks strive for higher communication rates, ultra-low latency, seamless connectivity, and high-resolution sensing capabilities. To meet these demands,…
Spatial Path Index Modulation in mmWave/THz-Band Integrated Sensing and Communications
Ahmet M. Elbir, Kumar Vijay Mishra, Asmaa Abdallah +2
As the demand for wireless connectivity continues to soar, the fifth generation and beyond wireless networks are exploring new ways to efficiently utilize the wireless spectrum and…
NBA-OMP: Near-field Beam-Split-Aware Orthogonal Matching Pursuit for Wideband THz Channel Estimation
Ahmet M. Elbir, Kumar Vijay Mishra, Symeon Chatzinotas
The sixth-generation networks envision the terahertz (THz) band as one of the key enabling technologies because of its ultrawide bandwidth. To combat the severe attenuation, the TH…
Near-Field Terahertz Communications: Model-Based and Model-Free Channel Estimation
Ahmet M. Elbir, Wei Shi, Anastasios K. Papazafeiropoulos +2
Terahertz (THz) band is expected to be one of the key enabling technologies of the sixth generation (6G) wireless networks because of its abundant available bandwidth and very narr…
BSA-OMP: Beam-Split-Aware Orthogonal Matching Pursuit for THz Channel Estimation
Ahmet M. Elbir, Symeon Chatzinotas
Terahertz (THz)-band has been envisioned for the sixth generation wireless networks thanks to its ultra-wide bandwidth and very narrow beamwidth. Nevertheless, THz-band transmissio…