30 citations · 37 across the 9 of their papers we have counts for
10 papers
Joint UAV Placement and IRS Phase Shift Optimization in Downlink Networks
Hung Nguyen-Kha, Hieu V. Nguyen, Mai T. P. Le +1
This study investigates the integration of an intelligent reflecting surface (IRS) into an unmanned aerial vehicle (UAV) platform to utilize the advantages of these leading technol…
Controlling Smart Propagation Environments: Long-Term versus Short-Term Phase Shift Optimization
Trinh Van Chien, Lam Thanh Tu, Dinh-Hieu Tran +4
Reconfigurable intelligent surfaces (RISs) have recently gained significant interest as an emerging technology for future wireless networks. This paper studies an RIS-assisted prop…
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…
Dynamic User Pairing for Non-Orthogonal Multiple Access in Downlink Networks
Kha-Hung Nguyen, Hieu V. Nguyen, Van-Phuc Bui +1
This paper considers a downlink (DL) system where non-orthogonal multiple access (NOMA) beamforming and dynamic user pairing are jointly optimized to maximize the minimum throughpu…
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…
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…
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…