10 papers
Fast Tri-Hybrid Beamforming via Deep Unfolding
Pinjun Zheng, Md. Jahangir Hossain, Anas Chaaban
Tri-hybrid multiple-input multiple-output architectures have recently emerged as a promising enabler for next-generation wireless systems, as they potentially provide enhanced desi…
AdaPTwin: Adaptive Multi-Fidelity Predictive Digital Twin for Proactive Radio Resource Management in Vehicular Networks
Armin Makvandi, Md. Zoheb Hassan, Md. Jahangir Hossain
The highly dynamic nature of vehicular networks necessitates proactive and site-specific radio resource management (RRM) to achieve ultra-reliable low-latency communications. While…
Millimeter-Wave RIS: Hardware Design and System-Level Considerations
Ruiqi Wang, Pinjun Zheng, Yiming Yang +6
Reconfigurable intelligent surfaces have emerged as a promising hardware platform for shaping wireless propagation environments at millimeter-wave (mm-Wave) frequencies and beyond.…
Model-Free Channel Estimation for Massive MIMO: A Channel Charting-Inspired Approach
Pinjun Zheng, Md. Jahangir Hossain, Anas Chaaban
Channel estimation is fundamental to wireless communications, yet it becomes increasingly challenging in massive multiple-input multiple-output (MIMO) systems where base stations e…
Reconfigurable Antennas for Next-Generation Wireless Communications: Technologies, Prototypes, Architectures, and Signal Processing
Pinjun Zheng, Ruiqi Wang, Yuchen Zhang +4
The transition to sixth-generation (6G) networks calls for wireless transceivers with enhanced adaptability and efficiency. Reconfigurable antennas (RAs) have emerged as a promisin…
Tri-Hybrid Multi-User Precoding Based on Electromagnetically Reconfigurable Antennas
Pinjun Zheng, Yuchen Zhang, Tareq Y. Al-Naffouri +2
The tri-hybrid precoding architecture based on electromagnetically reconfigurable antennas (ERAs) is a promising solution for overcoming key limitations in multiple-input multiple-…
Tri-Hybrid Multi-User Precoding Using Pattern-Reconfigurable Antennas: Fundamental Models and Practical Algorithms
Pinjun Zheng, Yuchen Zhang, Tareq Y. Al-Naffouri +2
The integration of pattern-reconfigurable antennas into hybrid multiple-input multiple-output (MIMO) architectures presents a promising path toward high-efficiency and low-cost tra…
Enhanced Beampattern Synthesis Using Electromagnetically Reconfigurable Antennas
Pinjun Zheng, Md. Jahangir Hossain, Anas Chaaban
Beampattern synthesis seeks to optimize array weights to shape radiation patterns, playing a critical role in various wireless applications. In addition to theoretical advancements…
From Centralized RAN to Open RAN: A Survey on the Evolution of Distributed Antenna Systems
Mahmoud A. Hasabelnaby, Mohanad Obeed, Mohammed Saif +2
Next-generation mobile networks require evolved radio access network (RAN) architectures to meet the demands of high capacity, massive connectivity, reduced costs, and energy effic…
A Statistical Evaluation of Coherence Time for Non-Terrestrial Communications
Pinjun Zheng, Anas Chaaban, Md. Jahangir Hossain +1
Non-terrestrial networks (NTNs) present significant challenges for reliable communication due to the dynamic nature of their channels. Studying channel coherence time is crucial, s…