Characterization of dual-polarization LTE radio over a free-space optical turbulence channel

Bohata, Jan; Zvánovec, Stanislav; Korinek, Tomas; Abadi, Mojtaba Mansour; Ghassemlooy, Zabih

doi:10.1364/ao.54.007082

Cited by 16 publications

(9 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The atmospheric chamber set up for measurements in the facilities of the Czech Technical University in Prague [27] features two heater fans, and one Glycerine machine, that can blow hot air and fog into the chamber, respectively. For the characterization of turbulence and light scintillation in the chamber, an array of 20 temperature sensors were set up equidistantly.…”

Section: Laboratory Chambermentioning

confidence: 99%

“…The experiments carried out for this work were done using a laboratory chamber, and the conditions emulated were of heat-induced turbulence and the presence of fog in the air. The refractive index structure parameter (C 2 n ) [27] is used to estimate the level of turbulence and the meteorological visibility (V M ) as a measure of the level of fog. The fog experiments are especially relevant because we utilize the camera's built-in amplifier to overcome the fog attenuation and mitigate the relative contribution of the quantization noise induced by the analog-to-digital conversion stage, ensuring an improvement of the signal quality without increasing the exposure time, and, thus, keeping a high bandwidth.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimentally Derived Feasibility of Optical Camera Communications under Turbulence and Fog Conditions

Matus

Eso

Teli

et al. 2020

Sensors

View full text Add to dashboard Cite

Optical camera communications (OCC) research field has grown recently, aided by ubiquitous digital cameras; however, atmospheric conditions can restrict their feasibility in outdoor scenarios. In this work, we studied an experimental OCC system under environmental phenomena emulated in a laboratory chamber. We found that the heat-induced turbulence does not affect our system significantly, while the attenuation caused by fog does decrease the signal quality. For this reason, a novel strategy is proposed, using the camera’s built-in amplifier to overcome the optical power loss and to decrease the quantization noise induced by the analog-digital converter of the camera. The signal quality has been evaluated using the Pearson’s correlation coefficient with respect to a reference template signal, along with the signal-to-noise ratio that has been empirically evaluated. The amplification mechanism introduced allows our system to receive the OCC signal under heavy fog by gradually increasing the camera gain up to 16 dB, for meteorological visibility values down to 10 m, with a correlation coefficient of 0.9 with respect to clear conditions.

show abstract

Section: Laboratory Chambermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimentally Derived Feasibility of Optical Camera Communications under Turbulence and Fog Conditions

Matus

Eso

Teli

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…To measure the temperature profile and determine the temperature gradient along the channel, we placed 20 thermal sensors at an interval of 10 cm along the FSO channel. We used Rytov variance and the refractive index structure parameter to characterize strength of the turbulence according to [22]. The variance of the log-intensity signal fluctuation defined by Rytov variance R 2 is given by [31]:…”

Section: Fso Turbulence Effectsmentioning

confidence: 99%

“…The authors reported a predicted power penalty of ~25 dB at a symbol error probability of 10E-8 for the strong turbulence regime (Rytov variance σR 2 of 3.5). The first concept of the dual-polarization multiplexing RoFSO system proposed for the LTE radio signal was investigated in [22].…”

Section: Introductionmentioning

confidence: 99%

Experimental verification of long-term evolution radio transmissions over dual-polarization combined fiber and free-space optics optical infrastructures

et al. 2016

Self Cite

View full text Add to dashboard Cite

This paper describes the experimental verification of the utilization of long-term evolution radio over fiber (RoF) and radio over free space optics (RoFSO) systems using dual-polarization signals for cloud radio access network applications determining the specific utilization limits. A number of free space optics configurations are proposed and investigated under different atmospheric turbulence regimes in order to recommend the best setup configuration. We show that the performance of the proposed link, based on the combination of RoF and RoFSO for 64 QAM at 2.6 GHz, is more affected by the turbulence based on the measured difference error vector magnitude value of 5.5%. It is further demonstrated the proposed systems can offer higher noise immunity under particular scenarios with the signal-to-noise ratio reliability limit of 5 dB in the radio frequency domain for RoF and 19.3 dB in the optical domain for a combination of RoF and RoFSO links.

show abstract

“…In outstretching technology of optical communication system, several systems use the radio-over-fiber (ROF) technology. The main purpose of this method is integration with other networks and low dispersion [4][5]. But, integration the radio frequency (RF) wave with FSO system is hardly affected by the atmosphere turbulent that is one of the advantage of radio over free space communication [6].…”

Section: Introductionmentioning

confidence: 99%

Modeling of RF Waves in Free Space Optical Communication System Under Gamma-Gamma Turbulent Channel Effect

Alipour

Mir

2019

IJOP

View full text Add to dashboard Cite

In this paper, an enhancement design of communication system using optical radio frequency (RF) waves in free space optical communication (FSO) system is presented. To our knowledge, it is the first time that the effect of Gamma-Gamma turbulent channel model on the performance of the proposed system is analyzed and simulated. To obtain an optical communication system with good performance and high spectrum efficiency, we proposed two types of optical RF waves including optical single sideband (OSSB) and optical double sideband (ODSB). This strategy that integrated an optical communication system with turbulent channel model can express an accurate model of optical and RF waves propagation in free space. Performance of the system under different regimes, weak, moderate and strong turbulent is studied considering several parameters like max quality factor, bit error rates (BER), and optical signal-to-noise ratio (OSNR). Also, a comparative study between two methods of optical RF waves is presented.

show abstract

Characterization of dual-polarization LTE radio over a free-space optical turbulence channel

Cited by 16 publications

References 56 publications

Experimentally Derived Feasibility of Optical Camera Communications under Turbulence and Fog Conditions

Experimentally Derived Feasibility of Optical Camera Communications under Turbulence and Fog Conditions

Experimental verification of long-term evolution radio transmissions over dual-polarization combined fiber and free-space optics optical infrastructures

Modeling of RF Waves in Free Space Optical Communication System Under Gamma-Gamma Turbulent Channel Effect

Contact Info

Product

Resources

About