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Browsing by Author "Ghassemlooy, Zabih"

Now showing items 1-6 of 6

Combined effect of turbulence and aerosol on free-space optical links

Libich, Jiri; Perez, Joaquin; Zvanovec, Stanislav; Ghassemlooy, Zabih; Nebuloni, Roberto; Capsoni, Carlo (The Optical Society, 2017-01-10)

[EN] Despite the benefits of free-space optical (FSO) communications, their full utilization is limited by the influence of atmospheric weather conditions, such as fog, turbulence, smoke, snow, etc. In urban environments, ...
Enhancing the atmospheric visibility and fog attenuation using a controlled FSO channel

Ijaz, Muhammad; Ghassemlooy, Zabih; Perez, Joaquin; Brazda, Vladimir; Fiser, Ondrej (Institute of Electrical and Electronics Engineers (IEEE), 2013-07-01)

[EN] In this letter, two methods for characterizing fog attenuation in terms of atmospheric visibility V in free space optics (FSO) communications are analyzed and compared. Both methods measure the fog attenuation based ...
Error mitigation using RaptorQ codes in an experimental indoor free space optical link under the influence of turbulence

Pernice, Riccardo; Parisi, Antonino; Ando, Andrea; Mangione, Stefano; Garbo, Giovanni; Busacca, Alessandro C.; Perez, Joaquin; Ghassemlooy, Zabih (Institution of Engineering and Technology (IET), 2015-09-22)

In free space optical (FSO) communications, several factors can strongly affect the link quality. Among them, one of the most important impairments that can degrade the FSO link quality and its reliability even under the ...
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 ...
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, ...
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-, ...