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George C. Alexandropoulos

Cyclic-Prefixed Single-Carrier Transmission for RIS-Empowered Broadband Wireless Systems


Jan 06, 2022
Qiang Li, Miaowen Wen, Ertugrul Basar, George C. Alexandropoulos, Kyeong Jin Kim, H. Vincent Poor

* Submitted to an IEEE Journal 

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Joint Analog and Digital Transceiver Design for Wideband Full Duplex MIMO Systems


Dec 16, 2021
Md Atiqul Islam, George C. Alexandropoulos, Besma Smida

* 32 pages, 10 figures, Under Review for Publication in the IEEE Transactions on Wireless Communications 

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Multi-User Holographic MIMO Surface: Channel Modeling and Spectral Efficiency Analysis


Dec 06, 2021
Li Wei, Chongwen Huang, George C. Alexandropoulos, Wei E. I. Sha, Zhaoyang Zhang, Merouane Debbah, Chau Yuen


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An Amplifying RIS Architecture with a Single Power Amplifier: Energy Efficiency and Error Performance Analysis


Nov 18, 2021
Recep Akif Tasci, Fatih Kilinc, Ertugrul Basar, George C. Alexandropoulos


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ADMM-DAD net: a deep unfolding network for analysis compressed sensing


Oct 13, 2021
Vasiliki Kouni, Georgios Paraskevopoulos, Holger Rauhut, George C. Alexandropoulos


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Direction-Assisted Beam Management in Full Duplex Millimeter Wave Massive MIMO Systems


Sep 15, 2021
Md Atiqul Islam, George C. Alexandropoulos, Besma Smida

* 6 pages, 5 figures. To appear in the Proceedings of the IEEE Global Communications Conference (GLOBECOM), 7-11 Dec. 2021, Madrid, Spain 

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Dynamic Metasurface Antennas for Energy Efficient Massive MIMO Uplink Communications


Jun 17, 2021
Li You, Jie Xu, George C. Alexandropoulos, Jue Wang, Wenjin Wang, Xiqi Gao


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Hybrid Reconfigurable Intelligent Metasurfaces: Enabling Simultaneous Tunable Reflections and Sensing for 6G Wireless Communications


Apr 10, 2021
George C. Alexandropoulos, Nir Shlezinger, Idban Alamzadeh, Mohammadreza F. Imani, Haiyang Zhang, Yonina C. Eldar

* 7 pages, 6 figures, submitted to an IEEE magazine 

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Self-Calibrating Indoor Localization with Crowdsourcing Fingerprints and Transfer Learning


Jan 26, 2021
Chenlu Xiang, Shunqing Zhang, Shugong Xu, George C. Alexandropoulos

* To appear at ICC 2021 

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Multi-hop RIS-Empowered Terahertz Communications: A DRL-based Hybrid Beamforming Design


Jan 22, 2021
Chongwen Huang, Zhaohui Yang, George C. Alexandropoulos, Kai Xiong, Li Wei, Chau Yuen, Zhaoyang Zhang, Merouane Debbah

* IEEE Journal on Selected Areas in Communications, Special issue: TeraHertz Communications and Networking. arXiv admin note: substantial text overlap with arXiv:2009.09380 

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Hybrid RIS-Empowered Reflection and Decode-and-Forward Relaying for Coverage Extension


Dec 22, 2020
Ibrahim Yildirim, Fatih Kilinc, Ertugrul Basar, George C. Alexandropoulos


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Phase Configuration Learning in Wireless Networks with Multiple Reconfigurable Intelligent Surfaces


Oct 09, 2020
George C. Alexandropoulos, Sumudu Samarakoon, Mehdi Bennis, Merouane Debbah

* 6 pages, 6 figures, accepted to IEEE GLOBECOM 2020 

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Hybrid Beamforming for RIS-Empowered Multi-hop Terahertz Communications: A DRL-based Method


Sep 20, 2020
Chongwen Huang, Zhaohui Yang, George C. Alexandropoulos, Kai Xiong, Li Wei, Chau Yuen, Zhaoyang Zhang

* Accepted by 2020 GLOBECOM Workshop 

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Channel Estimation for RIS-Empowered Multi-User MISO Wireless Communications


Aug 04, 2020
Li Wei, Chongwen Huang, George C. Alexandropoulos, Senior Member, IEEE, Chau Yuen, Senior Member, IEEE, Zhaoyang Zhang, Member, IEEE, Mérouane Debbah, Fellow, IEEE


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Holographic MIMO Surfaces for 6G Wireless Networks: Opportunities, Challenges, and Trends


Dec 01, 2019
Chongwen Huang, Sha Hu, George C. Alexandropoulos, Alessio Zappone, Chau Yuen, Rui Zhang, Marco Di Renzo, Mérouane Debbah

* Submit to the possible magazine, 7-pages, 5-figures 

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Indoor Signal Focusing with Deep Learning Designed Reconfigurable Intelligent Surfaces


May 19, 2019
Chongwen Huang, George C. Alexandropoulos, Chau Yuen, Mérouane Debbah

* 5 pages, Accepted by SPAWC 2019 

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Deep Learning for UL/DL Channel Calibration in Generic Massive MIMO Systems


Mar 07, 2019
Chongwen Huang, George C. Alexandropoulos, Alessio Zappone, Chau Yuen, Mérouane Debbah

* 6-pages, accepted by ICC WC Symposium 2019 

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