20 citations · 74 across the 27 of their papers we have counts for
29 papers
Metaheuristic Optimization of Trajectory and Dynamic Time Splitting for UAV Communication Systems
Trinh Van Chien, Nguyen Minh Quan, Oh-Soon Shin +1
The integration of unmanned aerial vehicles (UAVs) into wireless communication systems has emerged as a transformative approach, promising cost-efficient connectivity. This paper a…
Performance Analysis and Power Allocation for Massive MIMO ISAC Systems
Nhan Thanh Nguyen, Van-Dinh Nguyen, Hieu V. Nguyen +3
Integrated sensing and communications (ISAC) is envisioned as a key feature in future wireless communications networks. Its integration with massive multiple-input-multiple-output…
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…
Asymptotic Analysis of Max-Min Weighted SINR for IRS-Assisted MISO Systems with Hardware Impairments
Anastasios Papazafeiropoulos, Cunhua Pan, Ahmet Elbir +3
We focus on the realistic maximization of the uplink minimum signal-to-interference-plus-noise ratio (SINR) of a general multiple-input single-output (MISO) system assisted by an i…
FedFog: Network-Aware Optimization of Federated Learning over Wireless Fog-Cloud Systems
Van-Dinh Nguyen, Symeon Chatzinotas, Bjorn Ottersten +1
Federated learning (FL) is capable of performing large distributed machine learning tasks across multiple edge users by periodically aggregating trained local parameters. To addres…
Hybrid Relay-Reflecting Intelligent Surface-Aided Wireless Communications: Opportunities, Challenges, and Future Perspectives
Nhan Thanh Nguyen, Jiguang He, Van-Dinh Nguyen +5
Reconfigurable intelligent surfaces (RISs) have emerged as a cost- and energy-efficient technology that can customize and program the physical propagation environment by reflecting…
Task-oriented Communication Design in Cyber-Physical Systems: A Survey on Theory and Applications
Arsham Mostaani, Thang X. Vu, Shree Krishna Sharma +3
Communications system design has been traditionally guided by task-agnostic principles, which aim at efficiently transmitting as many correct bits as possible through a given chann…
Machine Learning-Enabled Joint Antenna Selection and Precoding Design: From Offline Complexity to Online Performance
Thang X. Vu, Symeon Chatzinotas, Van-Dinh Nguyen +4
We investigate the performance of multi-user multiple-antenna downlink systems in which a BS serves multiple users via a shared wireless medium. In order to fully exploit the spati…
Energy Efficiency Maximization in RIS-Aided Cell-Free Network with Limited Backhaul
Quang Nhat Le, Van-Dinh Nguyen, Octavia A. Dobre +1
Integrating the reconfigurable intelligent surface in a cell-free (RIS-CF) network is an effective solution to improve the capacity and coverage of future wireless systems with low…
Learning-Assisted User Clustering in Cell-Free Massive MIMO-NOMA Networks
Quang Nhat Le, Van-Dinh Nguyen, Nam-Phong Nguyen +3
The superior spectral efficiency (SE) and user fairness feature of non-orthogonal multiple access (NOMA) systems are achieved by exploiting user clustering (UC) more efficiently. H…
UAV Relay-Assisted Emergency Communications in IoT Networks: Resource Allocation and Trajectory Optimization
Dinh-Hieu Tran, Van-Dinh Nguyen, Sumit Gautam +3
Unmanned aerial vehicle (UAV) communication has emerged as a prominent technology for emergency communications (e.g., natural disaster) in the Internet of Things (IoT) networks to…
A Novel Heap-based Pilot Assignment for Full Duplex Cell-Free Massive MIMO with Zero-Forcing
Hieu V. Nguyen, Van-Dinh Nguyen, Octavia A. Dobre +4
This paper investigates the combined benefits of full-duplex (FD) and cell-free massive multiple-input multipleoutput (CF-mMIMO), where a large number of distributed access points…
UAV-Assisted Secure Communications in Terrestrial Cognitive Radio Networks: Joint Power Control and 3D Trajectory Optimization
Phu X. Nguyen, Van-Dinh Nguyen, Hieu V. Nguyen +1
This paper considers secure communications for an underlay cognitive radio network (CRN) in the presence of an external eavesdropper (Eve). The secrecy performance of CRNs is usual…
Optimization of Rate Fairness in Multi-Pair Wireless-Powered Relaying Systems
Van-Phuc Bui, Van-Dinh Nguyen, Hieu V. Nguyen +2
This letter considers a multi-pair decode-and-forward relay network where a power-splitting (PS) protocol is adopted at the energy-constrained relay to provide simultaneous wireles…
On the Spectral and Energy Efficiencies of Full-Duplex Cell-Free Massive MIMO
Hieu V. Nguyen, Van-Dinh Nguyen, Octavia A. Dobre +4
In-band full-duplex (FD) operation is practically more suited for short-range communications such as WiFi and small-cell networks, due to its current practical limitations on the s…
Joint Power Control and User Association for NOMA-Based Full-Duplex Systems
Hieu V. Nguyen, Van-Dinh Nguyen, Octavia A. Dobre +3
This paper investigates the coexistence of non-orthogonal multiple access (NOMA) and full-duplex (FD) to improve both spectral efficiency (SE) and user fairness. In such a scenario…
Joint Antenna Array Mode Selection and User Assignment for Full-Duplex MU-MISO Systems
Hieu V. Nguyen, Van-Dinh Nguyen, Octavia A. Dobre +2
This paper considers a full-duplex (FD) multiuser multiple-input single-output system where a base station simultaneously serves both uplink (UL) and downlink (DL) users on the sam…
Optimal User Pairing for Achieving Rate Fairness in Downlink NOMA Networks
Van-Phuc Bui, Phu X. Nguyen, Hieu V. Nguyen +2
In this paper, a downlink non-orthogonal multiple access (NOMA) network is studied. We investigate the problem of jointly optimizing user pairing and beamforming design to maximize…
A New Design Paradigm for Secure Full-Duplex Multiuser Systems
Van-Dinh Nguyen, Hieu V. Nguyen, Octavia A. Dobre +1
We consider a full-duplex (FD) multiuser system where an FD base station (BS) is designed to simultaneously serve both downlink (DL) and uplink (UL) users in the presence of half-d…
Cooperative Prediction-and-Sensing Based Spectrum Sharing in Cognitive Radio Networks
Van-Dinh Nguyen, Oh-Soon Shin
This paper proposes prediction-and-sensing based spectrum sharing, a new spectrum-sharing model for cognitive radio networks, with a time structure for each resource block divided…
Enhancing PHY Security of Cooperative Cognitive Radio Multicast Communications
Van-Dinh Nguyen, Trung Q. Duong, Oh-Soon Shin +2
In this paper, we propose a cooperative approach to improve the security of both primary and secondary systems in cognitive radio multicast communications. During their access to t…
On the Design of Secure Full-Duplex Multiuser Systems under User Grouping Method
Van-Dinh Nguyen, Hieu V. Nguyen, Octavia A. Dobre +1
Consider a full-duplex (FD) multiuser system where an FD base station (BS) is designed to simultaneously serve both downlink users and uplink users in the presence of half-duplex e…
Precoder Design for Signal Superposition in MIMO-NOMA Multicell Networks
Van-Dinh Nguyen, Hoang Duong Tuan, Trung Q. Duong +2
The throughput of users with poor channel conditions, such as those at a cell edge, is a bottleneck in wireless systems. A major part of the power budget must be allocated to serve…
Joint Fractional Time Allocation and Beamforming for Downlink Multiuser MISO Systems
Van-Dinh Nguyen, Hoang Duong Tuan, Trung Q. Duong +2
It is well-known that the traditional transmit beamforming at a base station (BS) to manage interference in serving multiple users is effective only when the number of users is les…