10 papers
Reconfigurable Antennas for 6G: 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…
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…
Deep Complex-valued Neural-Network Modeling and Optimization of Stacked Intelligent Surfaces
Abdullah Zayat, Omran Abbas, Loic Markley +1
We propose a complex-valued neural-network (CV-NN) framework to optimally configure stacked intelligent surfaces (SIS) in next-generation multi-antenna systems. Unlike conventional…
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…
Mutli-Level Autoencoder: Deep Learning Based Channel Coding and Modulation
Ahmad Abdel-Qader, Anas Chaaban, Mohamed S. Shehata
In this paper, we design a deep learning-based convolutional autoencoder for channel coding and modulation. The objective is to develop an adaptive scheme capable of operating at v…
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…