19 citations · 27 across the 31 of their papers we have counts for
14 papers · 1 filter
Integrated Positioning and Communication for Cooperative Multi-LEO Uplink Communications: A Dual-Timescale Kalman Filter-Aided Approach
Ali Hanif, Yuchen Zhang, Pinjun Zheng +1
Low Earth orbit (LEO) satellites are a crucial component of the future non-terrestrial networks (NTN) due to lower latency, robust signal strengths, shorter revisit times, and dens…
Orbital Errors in LEO Satellite Positioning: Modeling, Analysis, and Bayesian Calibration
Jie Ma, Pinjun Zheng, Xing Liu +3
Low-Earth orbit (LEO) satellites offer a promising alternative to global navigation satellite systems for precise positioning. However, their relatively low altitudes make them mor…
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-…
Design and Channel Modeling of Electromagnetically Reconfigurable Antennas
Ruiqi Wang, Pinjun Zheng, Tareq Y. Al-Naffouri +1
In this work, a novel design of electromagnetically reconfigurable antennas (ERAs) based on a fluid antenna system (FAS) is proposed, and the corresponding wireless channel model i…
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…
Joint Bistatic Positioning and Monostatic Sensing: Optimized Beamforming and Performance Tradeoff
Yuchen Zhang, Hui Chen, Pinjun Zheng +4
We investigate joint bistatic positioning (BP) and monostatic sensing (MS) within a multi-input multi-output orthogonal frequency-division system. Based on the derived Cramér-Rao B…
Optimized Beamforming for Joint Bistatic Positioning and Monostatic Sensing
Yuchen Zhang, Hui Chen, Pinjun Zheng +3
We investigate the performance tradeoff between \textit{bistatic positioning (BP)} and \textit{monostatic sensing (MS)} in a multi-input multi-output orthogonal frequency division…
Privacy Preservation in MIMO-OFDM Localization Systems: A Beamforming Approach
Yuchen Zhang, Hui Chen, Musa Furkan Keskin +4
We investigate an uplink MIMO-OFDM localization scenario where a legitimate base station (BS) aims to localize a user equipment (UE) using pilot signals transmitted by the UE, whil…
Electromagnetically Reconfigurable Fluid Antenna System for Wireless Communications: Design, Modeling, Algorithm, Fabrication, and Experiment
Ruiqi Wang, Pinjun Zheng, Vijith Varma Kotte +5
This paper presents the concept, design, channel modeling, beamforming algorithm development, prototype fabrication, and experimental measurement of an electromagnetically reconfig…
Positioning-Aided Channel Estimation for Multi-LEO Satellite Cooperative Beamforming
Yuchen Zhang, Pinjun Zheng, Jie Ma +2
We investigate a multi-low Earth orbit (LEO) satellite system that simultaneously provides positioning and communication services to terrestrial user terminals. To address the chal…
Integrated 6G TN and NTN Localization: Challenges, Opportunities, and Advancements
Sharief Saleh, Pinjun Zheng, Xing Liu +8
The rapid evolution of cellular networks has introduced groundbreaking technologies, including large and distributed antenna arrays and reconfigurable intelligent surfaces in terre…