258 citations · 1.2k across the 44 of their papers we have counts for
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Machine Learning for Metasurfaces Design and Their Applications
Kumar Vijay Mishra, Ahmet M. Elbir, Amir I. Zaghloul
Metasurfaces (MTSs) are increasingly emerging as enabling technologies to meet the demands for multi-functional, small form-factor, efficient, reconfigurable, tunable, and low-cost…
Millimeter-Wave Radar Beamforming with Spatial Path Index Modulation Communications
Ahmet M. Elbir, Kumar Vijay Mishra, Abdulkadir Çelik +1
To efficiently utilize the wireless spectrum and save hardware costs, the fifth generation and beyond (B5G) wireless networks envisage integrated sensing and communications (ISAC)…
Twenty-Five Years of Advances in Beamforming: From Convex and Nonconvex Optimization to Learning Techniques
Ahmet M. Elbir, Kumar Vijay Mishra, Sergiy A. Vorobyov +1
Beamforming is a signal processing technique to steer, shape, and focus an electromagnetic wave using an array of sensors toward a desired direction. It has been used in several en…
A Unified Approach for Beam-Split Mitigation in Terahertz Wideband Hybrid Beamforming
Ahmet M. Elbir
The sixth generation networks envision the deployment of terahertz (THz) band as one of the key enabling property thanks to its abundant bandwidth. However, the ultra-wide bandwidt…
Terahertz-Band Channel and Beam Split Estimation via Array Perturbation Model
Ahmet M. Elbir, Wei Shi, Anastasios K. Papazafeiropoulos +2
For the demonstration of ultra-wideband bandwidth and pencil-beamforming, the terahertz (THz)-band has been envisioned as one of the key enabling technologies for the sixth generat…
Terahertz-Band Integrated Sensing and Communications: Challenges and Opportunities
Ahmet M. Elbir, Kumar Vijay Mishra, Symeon Chatzinotas +1
The sixth generation (6G) wireless networks aim to achieve ultra-high data transmission rates, very low latency and enhanced energy-efficiency. To this end, terahertz (THz) band is…
Federated Multi-Task Learning for THz Wideband Channel and DoA Estimation
Ahmet M. Elbir, Wei Shi, Kumar Vijay Mishra +1
This paper addresses two major challenges in terahertz (THz) channel estimation: the beam-split phenomenon, i.e., beam misalignment because of frequency-independent analog beamform…
Implicit Channel Learning for Machine Learning Applications in 6G Wireless Networks
Ahmet M. Elbir, Wei Shi, Kumar Vijay Mishra +2
With the deployment of the fifth generation (5G) wireless systems gathering momentum across the world, possible technologies for 6G are under active research discussions. In partic…
Federated Channel Learning for Intelligent Reflecting Surfaces With Fewer Pilot Signals
Ahmet M. Elbir, Sinem Coleri, Kumar Vijay Mishra
Channel estimation is a critical task in intelligent reflecting surface (IRS)-assisted wireless systems due to the uncertainties imposed by environment dynamics and rapid changes i…
The Rise of Intelligent Reflecting Surfaces in Integrated Sensing and Communications Paradigms
Ahmet M. Elbir, Kumar Vijay Mishra, M. R. Bhavani Shankar +1
The intelligent reflecting surface (IRS) alters the behavior of wireless media and, consequently, has potential to improve the performance and reliability of wireless systems such…