38 citations · 101 across the 35 of their papers we have counts for
17 papers · 1 filter
Deep-Unfolded Wideband ISAC Beamforming for DMA Under Frequency-Selective Lorentzian Model
Abdolrasoul Sakhaei Gharagezlou, Pouya Mobaraki, Mehdi Monemi +4
Integrated sensing and communications (ISAC), empowered by dynamic metasurface antennas (DMAs), has emerged as a promising paradigm for next-generation wireless networks. However,…
Low-Complexity Cramér-Rao Lower Bound and Sum Rate Optimization in ISAC Systems
Tianyu Fang, Nhan Thanh Nguyen, Markku Juntti
While Cramér-Rao lower bound is an important metric in sensing functions in integrated sensing and communications (ISAC) designs, its optimization usually involves a computationall…
Beamforming Design for Max-Min Fairness Performance Balancing in ISAC Systems
Tianyu Fang, Nhan Thanh Nguyen, Markku Juntti
Integrated sensing and communications (ISAC) is envisioned as a key technology for future wireless communications. In this paper, we consider a downlink monostatic ISAC system wher…
Joint Communications and Sensing Hybrid Beamforming Design via Deep Unfolding
Nhan Thanh Nguyen, Ly V. Nguyen, Nir Shlezinger +3
Joint communications and sensing (JCAS) is envisioned as a key feature in future wireless communications networks. In massive MIMO-JCAS systems, hybrid beamforming (HBF) is typical…
Joint Communications and Sensing Design for Multi-Carrier MIMO Systems
Nhan Thanh Nguyen, Nir Shlezinger, Khac-Hoang Ngo +2
In conventional joint communications and sensing (JCAS) designs for multi-carrier multiple-input multiple-output (MIMO) systems, the dual-functional waveforms are often optimized f…
Fairness Enhancement of UAV Systems with Hybrid Active-Passive RIS
Nhan Thanh Nguyen, Van-Dinh Nguyen, Hieu Van Nguyen +4
We consider unmanned aerial vehicle (UAV)-enabled wireless systems where downlink communications between a multi-antenna UAV and multiple users are assisted by a hybrid active-pass…
AI-Empowered Hybrid MIMO Beamforming
Nir Shlezinger, Mengyuan Ma, Ortal Lavi +3
Hybrid multiple-input multiple-output (MIMO) is an attractive technology for realizing extreme massive MIMO systems envisioned for future wireless communications in a scalable and…
Deep Unfolding Hybrid Beamforming Designs for THz Massive MIMO Systems
Nhan Thanh Nguyen, Mengyuan Ma, Nir Shlezinger +3
Hybrid beamforming (HBF) is a key enabler for wideband terahertz (THz) massive multiple-input multiple-output (mMIMO) communications systems. A core challenge with designing HBF sy…
Secrecy Capacity Maximization for a Hybrid Relay-RIS Scheme in mmWave MIMO Networks
Edson Nobuyuki Egashira, Diana Pamela Moya Osorio, Nhan Thanh Nguyen +1
The hybrid relay-reflecting intelligent surface (HR-RIS) has been recently introduced as an efficient solution to overcome the double path loss and limited beamforming diversity of…
Hybrid Active-Passive Reconfigurable Intelligent Surface-Assisted Multi-User MISO Systems
Nhan Thanh Nguyen, Van-Dinh Nguyen, Qingqing Wu +3
We consider a multi-user multiple-input single-output (MISO) communications system which is assisted by a hybrid active-passive reconfigurable intelligent surface (RIS). Unlike con…
Low-Latency and Secure Computation Offloading Assisted by Hybrid Relay-Reflecting Intelligent Surface
Khac-Hoang Ngo, Nhan Thanh Nguyen, Thinh Quang Dinh +2
Recently, the hybrid relay-reflecting intelligent surface (HRRIS) has been introduced as a spectral- and energy-efficient architecture to assist wireless communication systems. In…
Application of Deep Learning to Sphere Decoding for Large MIMO Systems
Nhan Thanh Nguyen, Kyungchun Lee, Huaiyu Dai
Although the sphere decoder (SD) is a powerful detector for multiple-input multiple-output (MIMO) systems, it has become computationally prohibitive in massive MIMO systems, where…
Hybrid Beamforming and Adaptive RF Chain Activation for Uplink Cell-Free Millimeter-Wave Massive MIMO Systems
Nhan Thanh Nguyen, Kyungchun Lee, Huaiyu Dai
In this work, we investigate hybrid analog-digital beamforming (HBF) architectures for uplink cell-free (CF) millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO)…
Groupwise Neighbor Examination for Tabu Search Detection in Large MIMO systems
Nhan Thanh Nguyen, Kyungchun Lee
In the conventional tabu search (TS) detection algorithm for multiple-input multiple-output (MIMO) systems, the metrics of all neighboring vectors are computed to determine the bes…
Deep Learning-Aided Tabu Search Detection for Large MIMO Systems
NhanThanh Nguyen, Kyungchun Lee
In this study, we consider the application of deep learning (DL) to tabu search (TS) detection in large multiple-input multiple-output (MIMO) systems. First, we propose a deep neur…
Unequally Sub-connected Architecture for Hybrid Beamforming in Massive MIMO Systems
Nhan Thanh Nguyen, Kyungchun Lee
A variety of hybrid analog-digital beamforming architectures have recently been proposed for massive multiple-input multiple-output (MIMO) systems to reduce energy consumption and…
Cell Coverage Extension with Orthogonal Random Precoding for Massive MIMO Systems
Nhan Thanh Nguyen, Kyungchun Lee
In this paper, we investigate a coverage extension scheme based on orthogonal random precoding (ORP) for the downlink of massive multiple-input multiple-output (MIMO) systems. In t…