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Listar por autor "Nguyen, Dong-Nhat"

Mostrando ítems 1-10 de 10

64-QAM LTE signal transmission at 25 GHz over hybrid SSMF and non-uniform turbulent FSO channel

Vallejo-Castro, Luis; Ortega Tamarit, Beatriz; Nguyen, Dong-Nhat; Bohata, Jan; Zvanovec, Stanislav (IEEE, 2020-11-25)

[EN] This contribution describes the impact of non uniform thermal-induced turbulence on 64-QAM LTE signal transmission at 25 GHz millimeter wave (mmW) signal along hybrid RoF/RoFSO links. Microwave photonic signal generation ...
Comparison of carrier suppressed and quadrature bias point external modulation for 40 GHz millimeter-wave photonic generation using a 16-QAM signal with directly modulated laser

Vallejo-Castro, Luis; Ortega Tamarit, Beatriz; Nguyen, Dong-Nhat; Bohata, Jan; Zvanovec, Stanislav; Almenar Terre, Vicenç (IEEE, 2020-07-22)

[EN] A directly modulated laser usage is proposed for 16-QAM signal transmission over hybrid optical links using two optical frequency multiplication schemes based on external modulation for 40 GHz millimeter-wave (mmW) ...
Full-duplex transmission of multi-Gb/s subcarrier multiplexing and 5G NR signals in 39 GHz band over fiber and space

Nguyen, Dong-Nhat; Vallejo-Castro, Luis; Almenar Terre, Vicenç; Ortega Tamarit, Beatriz; Dat, Pham Tien; Le, Son Thai; Bohata, Jan; Zvanovec, Stanislav (The Optical Society, 2022-02-10)

[EN] 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 ...
Impact of Thermal-Induced Turbulent Distribution Along FSO Link on Transmission of Photonically Generated mmW Signals in the Frequency Range 26¿40 GHz

Vallejo-Castro, Luis; Komanec, Matej; Ortega Tamarit, Beatriz; Bohata, Jan; Nguyen, Dong-Nhat; Zvanovec, Stanislav; Almenar Terre, Vicenç (Institute of Electrical and Electronics Engineers, 2020-02)

[EN] Microwave photonics is a promising solution to transmit millimeter wave (mmW) signals for the 5th generation (5G) mobile communications as part of a centralized radio access network (C-RAN). In this paper, we ...
M-QAM signal transmission at the photonically generated K-band over thermal-induced turbulent FSO links with different turbulence distributions

Vallejo-Castro, Luis; Nguyen, Dong-Nhat; Bohata, Jan; Ortega Tamarit, Beatriz; Zvanovec, Stanislav (The Optical Society, 2020-06-01)

[EN] We present a theoretical and experimental study on the impact of different thermal-induced free-space turbulence distributions on the M-quadrature amplitude modulation (M-QAM) signal transmission in radio frequency ...
On N-PAM and M-QAM implementation within the hybrid RoF-FSO-PON system

Nguyen, Dong-Nhat; Zvanovec, Stanislav; Bohata, Jan; Ortega Tamarit, Beatriz; Vallejo-Castro, Luis; Ghassemlooy, Zabih (IEEE, 2020-11-25)

[EN] This paper investigates an optical transmission architecture of a passive optical network (PON), which is compatible with the millimeter-wave radio-over-fiber and free-space optics systems (RoF-FSO) under weak-to-strong ...
On the 40 GHz Remote Versus Local Photonic Generation for DML-Based C-RAN Optical Fronthaul

Vallejo-Castro, Luis; Mora Almerich, José; Nguyen, Dong-Nhat; Bohata, Jan; Almenar Terre, Vicenç; Zvanovec, Stanislav; Ortega Tamarit, Beatriz (Institute of Electrical and Electronics Engineers, 2021-11-01)

[EN] Local and remote photonic millimeter wave (mmW) signal generation schemes are theoretically and experimentally evaluated in order to compare both approaches for practical deployment in a cloud radio access network ...
Transmission of 2 bits/symbol over RoF and RoFSO links with different architectures for ubiquitous coverage

Nguyen, Dong-Nhat; Zvanovec, Stanislav; Vallejo-Castro, Luis; Ortega Tamarit, Beatriz; Bohata, Jan; Ghassemlooy, Zabih (IEEE, 2020-07-22)

[EN] This paper investigates integrated radio-over-fiber and radio-over-free-space optic links in a passive optical network architecture for ubiquitous wireless coverage. Two optical millimeter-wave generation techniques, ...
Usability of a 5G fronthaul based on a DML and external modulation for M-QAM transmission over photonically generated 40 GHz

Vallejo-Castro, Luis; Ortega Tamarit, Beatriz; Nguyen, Dong-Nhat; Bohata, Jan; Almenar Terre, Vicenç; Zvanovec, Stanislav (Institute of Electrical and Electronics Engineers, 2020)

[EN] In this paper, we numerically and experimentally present the bandwidth constraints of a cost-effective 5G mobile fronthaul based on a directly-modulated laser for data modulation and a Mach-Zehnder modulator-based ...
Wideband QAM-over-SMF/turbulent FSO downlinks in a PON architecture for ubiquitous connectivity

Nguyen, Dong-Nhat; Vallejo-Castro, Luis; Bohata, Jan; Ortega Tamarit, Beatriz; Ghassemlooy, Zabih; Zvanovec, Stanislav (Elsevier, 2020-11-15)

[EN] We propose and investigate for the first time a seamless millimeter-wave (mmW) radio-over-fiber (RoF) and radio-over-free-space optics (FSO)-based downlink for use in a passive optical network architecture using 4-, ...