Explanipedia

A Deep Neural Network Codebook Approach for Near-Field Nulling Control Beam Focusing Open

Mohammad Hossein Karimi, Yuanzhe Gong, Tho Le‐Ngoc · 2025

This paper proposes a deep neural network (DNN) codebook approach for multi-user interference (MUI) mitigation in extremely large multiple-input multiple-output (XL-MIMO) systems operating in the near-field region. Unlike existing DNN-base…

Full Duplex Transmit and Receive Beamforming with Block-Sparse Antenna Selection for Multi-User Massive MIMO Open

Richard Ziegahn, Tho Le‐Ngoc · 2025

Distance-Domain Degrees of Freedom in Near-Field Region Open

Son Duong, Tho Le‐Ngoc · 2025

Extremely large aperture arrays operating in the near-field regime unlock additional spatial resources, which can be exploited to simultaneously serve multiple users even when they share the same angular direction. This work investigates t…

DFRC Systems Co-existing in Licensed Spectrum: Cognitive Beamforming Designs Open

Tuan Anh Le, Ivan Ku, Xin‐She Yang, Christos Masouros, Tho Le‐Ngoc · 2025

This paper introduces a dual-function radar-communication (DFRC) system with cognitive radio capability to tackle the spectral scarcity problem in wireless communications. Particularly, a cognitive DFRC system operates on a spectrum owned …

Joint Positioning, Beamforming, and Power Allocation in Full-Duplex MIMO with Position-Reconfigurable Antenna Arrays Open

Chengjie Zhao, Tho Le‐Ngoc · 2025

We consider a multi-user (MU) full-duplex (FD) multiple-input multiple-output (MIMO) communication system, in which the base station transceiver is equipped with transmit and receive position reconfigurable antennas (PRAs) to mitigate both…

Near-Field Nulling Control Beamfocusing Optimization for Multi-User Interference Suppression Open

Yuanzhe Gong, Mohammad Hossein Karimi, Tho Le‐Ngoc · 2025

This paper presents comprehensive full-wave simulation-based studies of near-field beam radiation patterns for large-scale arrays, accounting for realistic electromagnetic wave characteristics, heterogeneous element radiation patterns, and…

Spider RIS: Mobilizing Intelligent Surfaces for Enhanced Wireless Communications Open

İbrahim Yıldırım, Mobeen Mahmood, Ertuğrul Başar, Tho Le‐Ngoc · 2024

In this study, we introduce Spider RIS technology, which offers an innovative solution to the challenges encountered in movable antennas (MAs) and unmanned aerial vehicle (UAV)-enabled communication systems. By combining the dynamic adapta…

UAV-Assisted Enhanced Coverage and Capacity in Dynamic MU-mMIMO IoT Systems: A Deep Reinforcement Learning Approach Open

MohammadMahdi Ghadaksaz, Mobeen Mahmood, Tho Le‐Ngoc · 2024

This study focuses on a multi-user massive multiple-input multiple-output (MU-mMIMO) system by incorporating an unmanned aerial vehicle (UAV) as a decode-and-forward (DF) relay between the base station (BS) and multiple Internet-of-Things …

Multiple UAV-Assisted Cooperative DF Relaying in Multi-User Massive MIMO IoT Systems Open

Mobeen Mahmood, Yicheng Yuan, Tho Le‐Ngoc · 2024

This work considers a multi-user massive multiple-input multiple-output (MU-mMIMO) Internet-of-Things (IoT) system, where multiple unmanned aerial vehicles (UAVs) operating as decode-and-forward (DF) relays connect the base station (BS) to…

Adaptive Modulus RF Beamforming for Enhanced Self-Interference Suppression in Full-Duplex Massive MIMO Systems Open

Mobeen Mahmood, Yuanxing Zhang, Robert Morawski, Tho Le‐Ngoc · 2024

This study employs a uniform rectangular array (URA) sub-connected hybrid beamforming (SC-HBF) architecture to provide a novel self-interference (SI) suppression scheme in a full-duplex (FD) massive multiple-input multiple-output (mMIMO) s…

Achieving Capacity Gains in Practical Full-Duplex Massive MIMO Systems: A Multi-Objective Optimization Approach Using Hybrid Beamforming Open

Mobeen Mahmood, Asil Koç, Robert Morawski, Tho Le‐Ngoc · 2024

This paper presents a novel approach to full-duplex (FD) massive multiple-input multiple-output (mMIMO) systems using hybrid beamforming (HBF) architecture, enabling simultaneous uplink (UL) and downlink (DL) transmission within the same f…

Multi-RIS Assisted Hybrid Beamforming Design for Terahertz Massive MIMO Systems Open

Ibrahim Yildirim, Asil Koç, Ertuğrul Başar, Tho Le‐Ngoc · 2024

This paper presents an innovative approach for terahertz (THz) band communications, utilizing reconfigurable intelligent surfaces (RISs) to implement an angular-based hybrid beamforming (AB-HBF). This study examines two significant THz cha…

Metamaterial Absorber Structure for Tx-Rx Antenna Isolation Improvement in Full-Duplex Massive MIMO Open

Yuanzhe Gong, Robert Morawski, Tho Le‐Ngoc · 2024

This paper presents a novel metamaterial absorber structure for Tx-Rx antenna isolation improvement in the in-band full-duplex massive MIMO systems. The design processes of the absorber unit element, structure and placement, and their impa…

Full-Duplex in Massive Multiple-Input Multiple-Output Open

Tho Le‐Ngoc, Yuanzhe Gong, Mobeen Mahmood, Asil Koç, Robert Morawski , et al. · 2024

In-band full-duplex (FD) operation can double the spectral efficiency of massive multiple-input multiple-output (mMIMO) systems by allowing simultaneous transmission and reception over the same time/frequency slot. However, the main challe…

Perturbation-Based Nulling Control Beamforming With Measured Element Radiation Patterns for MU-mMIMO Open

Yuanzhe Gong, Arish Yaseen, Tingrui Zhang, Robert Morawski, Tho Le‐Ngoc · 2024

A perturbation-based nulling control beamforming (PNCB) scheme is proposed to effectively mitigate multi-user interference (MUI) in multi-user massive multiple-input multiple-output (MU-mMIMO) systems. This is achieved through the precise …

Deep Learning Meets Swarm Intelligence for UAV-Assisted IoT Coverage in Massive MIMO Open

Mobeen Mahmood, MohammadMahdi Ghadaksaz, Asil Koç, Tho Le‐Ngoc · 2023

This study considers a UAV-assisted multi-user massive multiple-input multiple-output (MU-mMIMO) systems, where a decode-and-forward (DF) relay in the form of an unmanned aerial vehicle (UAV) facilitates the transmission of multiple data s…

Sub-Array Selection in Full-Duplex Massive MIMO for Enhanced Self-Interference Suppression Open

Mobeen Mahmood, Asil Koç, Duc Tuong Nguyen, Robert Morawski, Tho Le‐Ngoc · 2023

This study considers a novel full-duplex (FD) massive multiple-input multiple-output (mMIMO) system using hybrid beamforming (HBF) architecture, which allows for simultaneous uplink (UL) and downlink (DL) transmission over the same frequen…

Antenna Array Structures for Enhanced Cluster Index Modulation Open

Mahmoud Raeisi, Asil Koç, İbrahim Yıldırım, Ertuğrul Başar, Tho Le‐Ngoc · 2023

This paper investigates the effect of various antenna array structures, i.e., uniform linear array (ULA), uniform rectangular array (URA), uniform circular array (UCA), and concentric circular array (CCA), on cluster index modulation (CIM)…

Cluster Index Modulation for Reconfigurable Intelligent Surface-Assisted mmWave Massive MIMO Open

Mahmoud Raeisi, Asil Koç, İbrahim Yıldırım, Ertuğrul Başar, Tho Le‐Ngoc · 2023

In this paper, we propose a transmission mechanism for a reconfigurable intelligent surface (RIS)-assisted millimeter wave (mmWave) system based on cluster index modulation (CIM), named best-gain optimized cluster selection CIM (BGCS-CIM).…

Platoon Leader Selection, User Association and Resource Allocation on a C-V2X based highway: A Reinforcement Learning Approach Open

Mohammad Farzanullah, Tho Le‐Ngoc · 2023

We consider the problem of dynamic platoon leader selection, user association, channel assignment, and power allocation on a cellular vehicle-to-everything (C-V2X) based highway, where multiple vehicle-to-vehicle (V2V) and vehicle-to-infra…

Dual-Layer Metamaterial Rectangular Antenna Arrays for In-Band Full-Duplex Massive MIMO Open

Yuanzhe Gong, Mobeen Mahmood, Robert Morawski, Tho Le‐Ngoc · 2023

This paper presents a prototype pair of dual-layer electromagnetic bandgap slotted circularly polarized patch Tx/Rx orthogonally-polarized antenna arrays designed for in-band full-duplex massive MIMO. The design processes of the antenna ar…

Reinforcement Learning based Multi-connectivity Resource Allocation in Factory Automation Systems Open

Mohammad Farzanullah, Hung V. Vu, Tho Le‐Ngoc · 2022

We propose joint user association, channel assignment and power allocation for mobile robot Ultra-Reliable and Low Latency Communications (URLLC) based on multi-connectivity and reinforcement learning. The mobile robots require control mes…

RIS-Aided Angular-Based Hybrid Beamforming Design in mmWave Massive MIMO Systems Open

İbrahim Yıldırım, Asil Koç, Ertuğrul Başar, Tho Le‐Ngoc · 2022

This paper proposes a reconfigurable intelligent surface (RIS)-aided and angular-based hybrid beamforming (AB-HBF) technique for the millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems. The proposed RIS-AB-HBF ar…

Nature-Inspired Intelligent α-Fair Hybrid Precoding in Multiuser Massive Multiple-Input Multiple-Output Systems Open

Asil Koç, Tho Le‐Ngoc · 2022

This paper proposes a novel nature-inspired $α$-fair hybrid precoding (NI-$α$HP) technique for millimeter-wave multi-user massive multiple-input multiple-output systems. Unlike the existing HP literature, we propose to apply $α$-fairness f…

Nature-Inspired Intelligent α-Fair Hybrid Precoding in Multiuser Massive Multiple-Input Multiple-Output Systems Open

Asil Koç, Tho Le‐Ngoc · 2022

This paper proposes a novel nature-inspired α-fair hybrid precoding (NI-αHP) technique for millimeter-wave multi-user massive multiple-input multiple-output systems. Unlike the existing HP literature, we propose to apply -fairness for main…

Nature-Inspired Intelligent α-Fair Hybrid Precoding in Multiuser Massive Multiple-Input Multiple-Output Systems Open

Asil Koç, Tho Le‐Ngoc · 2022

This paper proposes a novel nature-inspired α-fair hybrid precoding (NI-αHP) technique for millimeter-wave multi-user massive multiple-input multiple-output systems. Unlike the existing HP literature, we propose to apply -fairness for main…

Full-Duplex Non-Coherent Communications for Massive MIMO Systems with Analog Beamforming Open

Asil Koç, Ahmed Masmoudi, Tho Le‐Ngoc · 2022

International audience

Energy-Efficient Throughput Maximization in mmWave MU-Massive-MIMO-OFDM: Genetic Algorithm based Resource Allocation Open

Asil Koç, Farhan Bishe, Tho Le‐Ngoc · 2022

This paper develops a new genetic algorithm based resource allocation (GA-RA) technique for energy-efficient throughout maximization in multi-user massive multiple-input multiple-output (MU-mMIMO) systems using orthogonal frequency divisio…

Cluster Index Modulation for mmWave Communication Systems Open

Mahmoud Raeisi, Asil Koç, Ertuğrul Başar, Tho Le‐Ngoc · 2022

In this study, a novel cluster index modulation (CIM) scheme, which is based on indexing the available clusters in the environment, is proposed for future mmWave communication systems. Exploiting the fact that the available clusters in the…

Deep Learning based Multi-User Power Allocation and Hybrid Precoding in Massive MIMO Systems Open

Asil Koç, Mike Wang, Tho Le‐Ngoc · 2022

This paper proposes a deep learning based power allocation (DL-PA) and hybrid precoding technique for multiuser massive multiple-input multiple-output (MU-mMIMO) systems. We first utilize an angular-based hybrid precoding technique for red…

Tho Le‐Ngoc YOU? Author Swipe