Pham Tien Dat
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View article: The impact of microfinance on employment and income of the poor in Vietnam
The impact of microfinance on employment and income of the poor in Vietnam Open
In terms of theory and practice, microfinance activities have affirmed their role in promoting job creation and increasing income for the poor. This study focuses on analyzing the impact of microfinance on the employment and income of the …
View article: HEVERL – Viewport Estimation Using Reinforcement Learning for 360-degree Video Streaming
HEVERL – Viewport Estimation Using Reinforcement Learning for 360-degree Video Streaming Open
360-degree video content has become a pivotal component in virtual reality environments, offering viewers an immersive and engaging experience. However, streaming such comprehensive video content presents significant challenges due to the …
View article: Relationship between financial inclusion, inflation and financial stability of countries around the world and lessons for Vietnam
Relationship between financial inclusion, inflation and financial stability of countries around the world and lessons for Vietnam Open
The study examines the correlation between financial inclusion, inflation, and financial stability across 58 countries during the period 2004-2022, employing PVAR analysis. Impulse-response function outcomes indicate a negative relationshi…
View article: High-Speed Low-Complexity Optical PAM Links With a High-Slope-Efficiency Optical Modulator: Analysis and Demonstration
High-Speed Low-Complexity Optical PAM Links With a High-Slope-Efficiency Optical Modulator: Analysis and Demonstration Open
Achieving high data rate with simple system configuration and low power consumption is of great interest in short-reach intensity-modulation direct-detection (IM-DD) fiber links for future datacenter networks, business local area networks …
View article: Editorial Introduction to JSTQE Special Issue on Terahertz Photonics (2023)
Editorial Introduction to JSTQE Special Issue on Terahertz Photonics (2023) Open
Welcome to this Special Issue of the IEEE/OSA Journal of Selected Topics in Quantum Electronics on Terahertz Photonics! This special issue, comprising 18 contributed papers and seven invited papers, represents an overview of the state of t…
View article: Foreign ownership and national governance quality affect liquidity risk – case in Vietnam
Foreign ownership and national governance quality affect liquidity risk – case in Vietnam Open
The paper aim to examine the impact of foreign ownership and national governance quality on liquidity risk in Vietnam's listed commercial banks from 2010 to 2021, covering the COVID-19 outbreak. Using the two-step generalized method of mom…
View article: Robust Dual-Wavelength DRoF Link by Quasi-2-bit 256-QAM OFDM With Delta-Sigma Modulation
Robust Dual-Wavelength DRoF Link by Quasi-2-bit 256-QAM OFDM With Delta-Sigma Modulation Open
We experimentally demonstrated a robust dual-wavelength digital radio-over-fiber (DRoF) link by quasi-2-bit delta-sigma modulated 256- quadrature amplitude modulation orthogonal frequency-division multiplexing (QAM OFDM) data. By optically…
View article: Advanced Optical Modulators for Sub-THz-to-Optical Signal Conversion
Advanced Optical Modulators for Sub-THz-to-Optical Signal Conversion Open
The use of sub-terahertz (sub-THz) and/or THz bands is a method of achieving some attractive applications such as future large-capacity radio over fiber (RoF) networks. However, in the current scenario, the performance of devices operating…
View article: Traveling-Wave Mach-Zehnder Modulator Integrated With Electro-Optic Frequency-Domain Equalizer for Broadband Modulation
Traveling-Wave Mach-Zehnder Modulator Integrated With Electro-Optic Frequency-Domain Equalizer for Broadband Modulation Open
Broadband modulator is a key component of future high-capacity and high-baud-rate optical fiber communication. An electro-optic (EO) frequency-domain equalizer is proposed and investigated to increase the 3-dB bandwidth of optical modulato…
View article: Determinants of Sustainable Development: A Case Study in Vietnam
Determinants of Sustainable Development: A Case Study in Vietnam Open
Climate change is one of humanity's most significant challenges in the 21st century, directly affecting ecosystems, environmental resources, and human life.Besides, the evolution of the Covid-19 pandemic and various crises have significant…
View article: Millimeter Wave Attenuation Due to Wind and Heavy Rain in a Tropical Region
Millimeter Wave Attenuation Due to Wind and Heavy Rain in a Tropical Region Open
Millimeter wave fixed wireless systems in future backhaul and access network applications can be affected by weather conditions. The losses caused by rain attenuation and antenna misalignment due to wind-induced vibrations have greater imp…
View article: Factors Affecting the Green Economy Based on the Attraction of Foreign Direct Investment in the Context of Climate Change, Vietnam
Factors Affecting the Green Economy Based on the Attraction of Foreign Direct Investment in the Context of Climate Change, Vietnam Open
The complicated developments of the Covid-19 pandemic have made enterprises' investment and business cooperation activities in general, and foreign direct investment (FDI) enterprises face many challenges and risks in particular.In Vietnam…
View article: Free vibration analysis of FGM stepped nanostructures using nonlocal dynamic stiffness model
Free vibration analysis of FGM stepped nanostructures using nonlocal dynamic stiffness model Open
1. Aria A., Friswell M., 2019, A nonlocal finite element model for buckling and vibration of functionally graded nanobeams, Composites Part B: Engineering, 166, 233-246. CrossRef Google Scholar
View article: Full-duplex transmission of multi-Gb/s subcarrier multiplexing and 5G NR signals in 39 GHz band over fiber and space
Full-duplex transmission of multi-Gb/s subcarrier multiplexing and 5G NR signals in 39 GHz band over fiber and space Open
We propose a stable full-duplex transmission of millimeter-wave signals over a hybrid single-mode fiber (SMF) and free-space optics (FSO) link for the fifth-generation (5G) radio access networks to accelerate the Industry 4.0 transformatio…
View article: 3 × 3 MIMO Fiber–Wireless System in W-Band With WDM/PDM RoF Transmission Capability
3 × 3 MIMO Fiber–Wireless System in W-Band With WDM/PDM RoF Transmission Capability Open
We propose and demonstrate a 3×3 full multiple-input multiple-output (MIMO) fiber-wireless system in the W-band with wavelength-division multiplexing (WDM) and polarization-division multiplexing (PDM) radio-over-fiber (RoF) transmission ca…
View article: Millimeter-Wave and Terahertz Fixed Wireless Link Budget Evaluation for Extreme Weather Conditions
Millimeter-Wave and Terahertz Fixed Wireless Link Budget Evaluation for Extreme Weather Conditions Open
To develop highly reliable fixed wireless links, such as mobile backhaul and fronthaul systems, it is essential to evaluate the link budget under extreme weather conditions. In this paper, we presented a link budget evaluation for fixed wi…
View article: Polarization Division Multiplexing-Based Hybrid Microwave Photonic Links for Simultaneous mmW and Sub-6 GHz Wireless Transmissions
Polarization Division Multiplexing-Based Hybrid Microwave Photonic Links for Simultaneous mmW and Sub-6 GHz Wireless Transmissions Open
A new hybrid microwave photonic link based on a polarization division multiplexing Mach-Zehnder modulator (PDM-MZM) is proposed. The link enables co-transmission of millimeter-wave (mmW) and sub-6 GHz wireless signals over a seamless singl…
View article: FMCW linear cell radar interference mitigation through control of signal delay in radio-over-fiber links
FMCW linear cell radar interference mitigation through control of signal delay in radio-over-fiber links Open
To alleviate the danger of foreign object debris on runways, Frequency Modulated Continuous Wave linear cell radar based detection systems have been evaluated in the literature. This radar uses a 90 GHz millimeter wave and radio-over-fiber…
View article: Dynamic Physical-Layer Secured Link in a Mobile MIMO VLC System
Dynamic Physical-Layer Secured Link in a Mobile MIMO VLC System Open
This paper proposes a novel approach to provide a privately secured multiple-input and multiple-output visible light communication (VLC) in the mobility conditions. In the proposed system, a private secured VLC link is adaptively allocated…
View article: Wired and wireless seamless networks by photonics
Wired and wireless seamless networks by photonics Open
Demand for wireless services is increasing rapidly, due to deep penetration of mobile terminals, such as smartphones. Radio spectrum congestion is an important issue, even for conventional mobile services. One of the possible solutions wou…
View article: High-Speed Railway Communication System Using Linear-Cell-Based Radio-Over-Fiber Network and Its Field Trial in 90-GHz Bands
High-Speed Railway Communication System Using Linear-Cell-Based Radio-Over-Fiber Network and Its Field Trial in 90-GHz Bands Open
A linear-cell-based radio-over-fiber (LC-RoF) system is proposed and demonstrated for efficient mobile communication in high-speed trains without hard handover processes. The configuration of the LC-RoF network and possible router architec…
View article: 80 Gb/s 2 × 2 MIMO Fiber–Wireless Integrated System in W Band Using IFoF Transmission
80 Gb/s 2 × 2 MIMO Fiber–Wireless Integrated System in W Band Using IFoF Transmission Open
We present a high-speed integrated fiber-wireless system in the W band for transmission of multiple-input multiple-output (MIMO) radio signals. The proposed system utilizes a wavelength-division multiplexing intermediate frequency-overfibe…
View article: RESEARCH USING COMPOSITE MATERIALS IN MANUFACTURING PRESSURERESISTANT CIRCULAR DETAILS WITH THE TWO SPHERICAL BOTTOM BY WINDING TECHNOLOGY
RESEARCH USING COMPOSITE MATERIALS IN MANUFACTURING PRESSURERESISTANT CIRCULAR DETAILS WITH THE TWO SPHERICAL BOTTOM BY WINDING TECHNOLOGY Open
This paper presents the results of research about the using of composite materials to make circular rotating parts with two spherical ends. From the analysis of the working characteristics of this details, the article selected the winding …
View article: Photonic Systems and Devices for Linear Cell Radar
Photonic Systems and Devices for Linear Cell Radar Open
This paper reviews linear cell radar systems, which are radar systems consisting of many antenna units connected by radio-over-fiber to monitor linear-shaped areas. A linear cell system using a millimeter-wave band can provide high-resolut…
View article: High-Speed and Uninterrupted Communication for High-Speed Trains by Ultrafast WDM Fiber–Wireless Backhaul System
High-Speed and Uninterrupted Communication for High-Speed Trains by Ultrafast WDM Fiber–Wireless Backhaul System Open
We developed a high-speed and handover-free communication network for high-speed trains (HSTs) using an ultrafast and switchable wavelength-division multiplexing fiber–wireless backhaul system in the W band. We successfully transmitted app…
View article: 2 <inline-formula> <tex-math notation="LaTeX">$\times$</tex-math> </inline-formula> 2 MIMO FBMC-OQAM Signal Transmission Over a Seamless Fiber–Wireless System in the <italic>W</italic>-band
2 2 MIMO FBMC-OQAM Signal Transmission Over a Seamless Fiber–Wireless System in the W-band Open
Offset-QAM-based filterbank multicarrier (FBMC-OQAM) is an attractive modulation candidate to increase the spectral efficiency of radio-over-fiber and fiber-wireless systems. In this paper, we first propose a general framework for MIMO FBM…