Mohamadreza Delbari

I am a PhD Student and Research Assistant at the Technical University of Darmstadt, where I joined the Resilient Communication Systems Lab under the supervision of Prof. Vahid Jamali. I began my doctoral studies here in December 2022.

Prior to joining TU Darmstadt, I earned my B.Sc. degree in Electrical Engineering from Ferdowsi University (Mashhad, Iran) in 2019, and my M.Sc. degree in Telecommunications from Sharif University of Technology (Tehran, Iran) in 2022.

My research interests lie in the span of Reconfigurable Intelligent Surfaces (RIS), in particular on liquid crystal-based RISs, and MIMO near-field channel modeling.

My studies are partly supported by the Deutsche Forschungsgemeinschaft (DFG) within the Collaborative Research Center MAKI, the LOEWE initiative within the emergenCITY Centre, and the German Federal Ministry for Research, Technology and Space (BMFTR) joint project Open6GHub plus.

I develop most of my algorithms and simulations in MATLAB and Python. The source code is available on my GitHub for reproducibility.

Full List of Publications

Sorted by year.

Preprints

• M. Delbari, B. Wang, A. Asadi, V. Jamali, "Temperature-aware Optimization of Liquid Crystal Reconfigurable Intelligent Surfaces: Physics-based Modeling and Robust Design," Submitted to IEEE Transactions on Wireless Communications, 2026, arXiv.
• M. Delbari, R. Neuder, A. Jiménez-Sáez, Q. Zhou, V. Jamali, "Wideband Illumination with Liquid Crystal Reconfigurable Intelligent Surfaces: Modeling, Design, and Experimental Tests," Submitted to IEEE Transactions on Wireless Communications, 2026, arXiv.
• L. Hao, R. Neuder, M. Delbari, A. Jiménez-Sáez, V. Jamali, A. Asadi, A. Ortiz, "Learning-Based Phase Shift Optimization of Liquid Crystal RIS in Dynamic mmWave Networks," Submitted to IEEE Transactions on Wireless Communications, 2025, arXiv.
• M. Delbari, G. C. Alexandropoulos, R. Schober, H. V. Poor, V. Jamali, "Near-Field Multipath MIMO Channels: Modeling Reflectors and Exploiting NLOS Paths," Submitted to IEEE Transactions on Wireless Communications, 2025, arXiv.
• A. Jiménez-Sáez, A. Asadi, R. Neuder, M. Delbari, V. Jamali, "Reconfigurable Intelligent Surfaces with Liquid Crystal Technology: A Hardware Design and Communication Perspective," Under review, 2023, arXiv

Published Journals & Book Chapters

• M. Delbari, R. Neuder, A. Jiménez-Sáez, A. Asadi, V. Jamali, "Fast Reconfiguration of LC-RISs: Modeling and Algorithm Design," IEEE Transactions on Wireless Communications, vol. 25, pp. 10098-10114, 2026, doi: 10.1109/TWC.2026.3652460.
• M. Delbari, G. C. Alexandropoulos, R. Schober, V. Jamali, "Far- versus Near-Field RIS Modeling and Beam Design," Book chapter in Reconfigurable Intelligent Surfaces for Wireless Communications: Modeling, Architectures, and Applications, Springer, July 2026, 10.1007/978-981-95-1814-2_8, Preprint version: arXiv.
• M. Delbari, A. Javaheri, H. Zayyani, F. Marvasti, "Non-Coherent DOA Estimation via Majorization-Minimization Using Sign Information," IEEE Signal Processing Letters, vol. 29, pp. 892-896, 2022, doi: 10.1109/LSP.2022.3162153.

Conference Proceedings

• L. Wang, M. Delbari, G. Zhou, L. F Abanto-Leon, M. Hollick, V. Jamali, "Fault-Aware Design for Reconfigurable Holographic Surface-Aided ISAC Systems," PIMRC (Accepted), 2026, arXiv.
• M. Delbari, E. Mohammadi, M. Darabi, A. Asadi, A. Jiménez-Sáez, V. Jamali, "Flexible RISs: Learning-based Array Manifold Estimation and Phase-shift Optimization," EUSIPCO (Accepted), 2026, arXiv.
• M. Delbari, Q. Zhou, R. Neuder, A. Jiménez-Sáez, V. Jamali, "Near-field Liquid Crystal RIS Phase-Shift Design for Secure Wideband Illumination," IEEE Global Communications Conference, 2025, doi: 10.1109/GCWkshps68340.2025.11591109.
• N. M. Gholian, M. Delbari, V. Jamali, A. Asadi, "Temperature-Resilient LC-RIS Phase-Shift Design for Multi-user Downlink Communications," IEEE Global Communications Conference, 2025, doi: 10.1109/GLOBECOM59602.2025.11432520.
• B. Wang, M. Delbari, R. Neuder, A. Jiménez-Sáez, V. Jamali, "Liquid Crystal-Based RIS Loss-Trade-Off Analysis," International Workshop on Smart Antennas (WSA), 2025, doi: 10.1109/WSA65299.2025.11202776.
• M. Delbari, B. Wang, N. M. Gholian, A. Asadi, V. Jamali, "Temperature-Aware Phase-shift Design of LC-RIS for Secure Communication," IEEE International Conference on Communications, 2025, doi: 10.1109/ICC52391.2025.11161472.
• M. Delbari, G. C. Alexandropoulos, R. Schober, H. V. Poor, V. Jamali, "Near-Field Multipath MIMO Channel Model for Imperfect Surface Reflection," IEEE Global Communications Conference, 2024, doi: 10.1109/GCWkshp64532.2024.11101277.
• M. Delbari, R. Neuder, A. Jiménez-Sáez, A. Asadi, V. Jamali, "Fast Transition-Aware Reconfiguration of Liquid Crystal-based RISs," IEEE International Conference on Communications, 2024, doi: 10.1109/ICCWorkshops59551.2024.10615422.

Theses

• M. Delbari, "Non-coherent DOA Estimation via Majorization-Minimization Using Sign Information," Master of Science in Electrical Engineering, Sharif University of Technology, June 2022, PDF.

Presentations

• M. Delbari, Q. Zhou, R. Neuder, A. Jiménez-Sáez, V. Jamali, "Near-field Liquid Crystal RIS Phase-Shift Design for Secure Wideband Illumination," IEEE Global Communications Conference, 2025.
• M. Delbari, B. Wang, N. M. Gholian, A. Asadi, V. Jamali, "Temperature-Aware Phase-shift Design of LC-RIS for Secure Communication," IEEE International Conference on Communications, 2025.
• M. Delbari, G. C. Alexandropoulos, R. Schober, H. V. Poor, V. Jamali, "Near-Field Multipath MIMO Channel Model for Imperfect Surface Reflection," IEEE Global Communications Conference, 2024.
• M. Delbari, R. Neuder, A. Jiménez-Sáez, A. Asadi, V. Jamali, "Fast Transition-Aware Reconfiguration of Liquid Crystal-based RISs," IEEE International Conference on Communications, 2024.

Simulation Code

Source code for selected papers is available below:

• [Code] "Temperature-aware Optimization of Liquid Crystal Reconfigurable Intelligent Surfaces: Physics-based Modeling and Robust Design"
  [GitHub Link]
• [Code] "Wideband Illumination with Liquid Crystal Reconfigurable Intelligent Surfaces: Modeling, Design, and Experimental Tests"
  [GitHub Link]
• [Code] "Near-Field Multipath MIMO Channels: Modeling Reflectors and Exploiting NLOS Paths"
  [GitHub Link]
• [Code] "Far-versus Near-Field RIS Modeling and Beam Design"
  [GitHub Link]
• [Code] "Fast Reconfiguration of LC-RISs: Modeling and Algorithm Design"
  [GitHub Link]

Supervised Students

I have had the pleasure of supervising the following students at TU Darmstadt:

• Alireza Tavakoli Marzoni (M.Sc., 2025)
  Topic: Analysis and Optimization of LoRa-based Multiple Access
  Personal webpage: Scholar, Linkedin
• Qikai Zhou (M.Sc., 2025)
  Topic: RIS Configuration in Wideband Multi-User Communication Scenario
  Personal webpage: Researchgate
• Amirhossein Khosravi (M.Sc., 2024)
  Topic: RIS Configuration Through Mapping of Multipath Channels
  Personal webpage: Linkedin
• Ehsan Mohammadi (SHK, 2024)
  Topic: Flexible RIS
  Personal webpage: Linkedin
• Bowu Wang (M.Sc., 2023)
  Topic: Temperature-aware Design of Large Liquid Crystal-based RIS
  Personal webpage: Scholar, Linkedin

Teaching

• MIMO Communication Systems (Tutorial Instructor), TU Darmstadt (2023-Now):
  Tutorial 1, Tutorial 2, Tutorial 3, Tutorial 4, Tutorial 5, Tutorial 6, Tutorial 7, Tutorial 8, Tutorial 9, Tutorial 10, Tutorial 11, Tutorial 12.
  Matlab codes: [GitHub Link]