Prohlížení Publikační činnost ČVUT dle autora "Ghassemlooy Z."
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Demonstration of a Hybrid FSO/VLC Link for the Last Mile and Last Meter Networks
Autor: Pešek P.; Zvánovec S.; Chvojka P.; Ghassemlooy Z.; Haigh P.A.
(IEEE, 2019)In this paper, a hybrid free-space optical and visible light communication (FSO/VLC) system was experimentally demonstrated as a solution to overcome the last mile and last meter access networks bandwidth bottleneck. We ... -
Experimental all-optical relay-assisted FSO link with regeneration and forward scheme for ultra-short pulse transmission
Autor: Nor N.A.M.; Komanec M.; Bohata J.; Ghassemlooy Z.; Bhatnagar M.R.; Zvánovec S.
(Optical Society of America, 2019)This paper presents experimental results for an all-optical free-space optical (FSO) relay-assisted system by employing an all-optical regenerate and forward (AORF) scheme in order to increase the transmission link span. ... -
Experimental analysis of a triple-hop relay-assisted FSO system with turbulence
Autor: Nor N.A.M.; Ghassemlooy Z.; Zvánovec S.; Khalighi M.-A.; Bhatnagar M.R.; Bohata J.; Komanec M.
(Elsevier Science Publishers B.V., 2019)This paper outlines experimental investigation of the performance of the wireless optical network based on an all-optical triple-hop free space optical (FSO) communications employing amplify-and-forward relaying under the ... -
Experimental validation of indoor relay-assisted visible light communications for a last-meter access network
Autor: Pešek P.; Zvánovec S.; Chvojka P.; Ghassemlooy Z.; Nor N.A.M.; Tabeshmehr P.
(Elsevier, 2019)This paper provides experimental results for a relay-assisted visible light communications (VLC) link usinga white light-emitting diode (LED) for a last-meter access network. We demonstrate that a relay-based VLCscheme ... -
Filter-less WDM for visible light communications using colored pulse amplitude modulation
Autor: Burton A.; Haigh P.A.; Chvojka P.; Ghassemlooy Z.; Zvánovec S.
(Optical Society of America, 2019)This paper demonstrates, for the first time, a new wavelength-division multiplexing (WDM) scheme for visible light communications using multi-level coloured pulse amplitude modulation (M-CPAM). Unlike traditional WDM, no ... -
Impact of Channel Correlation on Different Performance Metrics of OSSK-Based FSO Systems
Autor: Priyadarshani R.; Jaiswal A.; Bhatnagar M.R.; Bohata J.; Zvánovec S.; Ghassemlooy Z.
(Institute of Electrical and Electronics Engineers, 2020)In this paper, we study the impact of correlation on the bit error rate (BER) and the channel capacity of a free-space optical (FSO) multiple-input-multiple-output (MIMO) system employing optical space shift keying (OSSK) ... -
Interference cancellation in MIMO NLOS optical-camera-communication-based intelligent transport systems
Autor: Hassan N.B.; Ghassemlooy Z.; Zvánovec S.; Biagi M.; Vegni A.M.; Zhang M.; Huang Y.
(Optical Society of America, 2019)The ever-increasing number of vehicles on a global level signifies the need for communications between vehicles and the surrounding environment. Visible light communications (VLC) is a viable complementary technology to ... -
M-QAM transmission over hybrid microwave photonic links at the K-band
Autor: Nguyen Dong N.; Bohata J.; Spáčil J.; Dousek D.; Komanec M.; Zvánovec S.; Ghassemlooy Z.; Ortega B.
(Optical Society of America, 2019)Two experimental configurations of a hybrid K-band (25 GHz) microwave photonic link (MPL) are investigated for seamless broadband wireless access networks. Experimental configurations consist of optical fiber, free-space ... -
Mitigation of dispersion and turbulence in a hybrid optical fibre and free-space optics link using electronic equalisation
Autor: Nguyen Dong N.; Zvánovec S.; Ghassemlooy Z.
(German Society for Applied Optics, 2019)Transmission of a 25 Gbps non-return to zero signal over a hybrid link of 20 km standard single-mode fibre and 500 m free-space optics under weak-to-moderate turbulence regimes is demonstrated via simulation to provide a ... -
On Optically Pre-amplified FSO-MISO Non-identical Links with Correlation: Experiment and Analysis
Autor: Priyadarshani R.; Bhatnagar M.; Bohata J.; Zvánovec S.; Ghassemlooy Z.
(American Institute of Physics and Magnetic Society of the IEEE, 2019)In this paper, various link characteristics and bit error rate (BER) performance of a free-space optical (FSO) multiple-input-single-output (MISO) system with repetition cod- ing (RC) is investigated both experimentally ... -
Optical Hybrid Fiber/Free-Space and 25 GHz Wireless Transmission using LTE M-QAM Signals
Autor: Nguyen Dong N.; Bohata J.; Komanec M.; Zvánovec S.; Ortega B.; Ghassemlooy Z.
(Instituto de Telecomunicaçoes - Lisboa, 2019)We experimentally demonstrate a seamless hybrid transmission of radio-over-fiber (RoF), radio-over-free-space optics (RoFSO) and millimeter wave wireless link using long-term evolution (LTE) 4/16/64-QAM signals for broadband ... -
Seamless 25 GHz Transmission of LTE 4/16/64-QAM Signals Over Hybrid SMF/FSO and Wireless Link
Autor: Nguyen Dong N.; Bohata J.; Komanec M.; Zvánovec S.; Ortega B.; Ghassemlooy Z.
(IEEE LEOS JLT Editorial Office, 2019)We propose and experimentally demonstrate a photonics-assisted converged radio-over-fiber (RoF), radio-over-free-space optics (RoFSO) and millimeter-wave (MMW) wireless transmission system for use in broadband wireless ... -
Should Analogue Pre-Equalisers be Avoided in VLC Systems?
Autor: Li X.; Ghassemlooy Z.; Zvánovec S.; Perez-Jimenez R.; Haigh P.A.
(IEEE, 2020)Visible light communication (VLC) systems are highly constrained by the limited 3-dB bandwidth of light-emitting diodes (LEDs). Analogue pre-equalisers have been proposed to extend the LED's bandwidth at the cost of reduced ... -
Visible light communications: multi-band super-Nyquist CAP modulation
Autor: Haigh P.A.; Chvojka P.; Ghassemlooy Z.; Zvánovec S.; Darwazeh I.
(Optical Society of America, 2019)In this paper, we experimentally demonstrate the performance of a non-orthogonal multi-band super-Nyquist carrier-less amplitude and phase (m-SCAP) modulation for visible light communications (VLC). We break the orthogonality ...