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1

Performance analysis of a RoFSO link for 5G networks under adverse weather conditions

Jose Tony, Ponraj Narain, John Victor Du

Przegląd Elektrotechniczny

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2021

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R. 97, nr 4

67--69

EN

5G systems are about to be democratized. Radio over Free Space Optics (RoFSO) is a promising technology which could back the rapid deployment of the 5G networks owing to its high data carrying capacity and hazzle free installation capabilities. The RoFSO links use the atmospheric channel for communication and are susceptible to performance degradation due to various environmental factors. In this work, a 26 GHz RoFSO link delivering 10 Gbps is designed and its bit error rate performance is analyzed using Kruze atmospheric model under different climatic conditions like rain, fog, dust, and haze.

PL

Dzięki sieci 5G możliwy jest rozwój takich technologii jak Radio over Free Space Optoics RoFSO. To radio łączy komunikację bezprzewodową z możliwością eliminacji zakłóceń. Opisano system o częstotliwości 26 GHz i przepustowości 10 Gbps.

2

Ergodic Channel Capacity of PPM-Coded Optical MIMO Communications Under Combined Effects

Cao Minghua, Zhang Yue, Kang Zhongjiang, Wang Huiqin

International Journal of Electronics and Telecommunications

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2021

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Vol. 67, No. 3

431--436

EN

The ergodic channel capacity of wireless optical multiple-input multiple-output (MIMO) system with pulse position modulation (PPM) is investigated. The combined effects of atmospheric turbulence, atmospheric attenuation, pointing error and channel spatial correlation are taken into consideration. The expression of ergodic channel capacity is derived, and is further performed by Wilkinson approximation method for simplicity. The simulation results indicated that the strong spatial correlation has the greatest influence on the ergodic channel capacity, followed by pointing errors and atmospheric turbulence. Moreover, the ergodic channel capacity growth brought by space diversity only performs well under independent and weakly correlated channels. Properly increasing the size and spacing of the receiving apertures is an effective means of effectively increasing the ergodic channel capacity.

3

Optical Wireless Communications Operated at Long-Wave Infrared Radiation

Mikolajczyk Janusz, Szabra Dariusz, Prokopiuk Artur, Achtenberg Krzysztof, Wojtas Jacek, Bielecki Zbigniew

International Journal of Electronics and Telecommunications

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2020

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Vol. 66, No. 2

383--387

EN

This paper presents some construction analysis and test results of a Free Space Optics system operating at the wavelength of 9.35 μm. In the system, a quantum cascade laser and a photoreceiver with mercury cadmium telluride photodetectors were used. The main parameters of these elements were discussed taking into account a data link operation. It also provides to determine a data range for various weather conditions related to scattering and scintillation. The results of numerical analyses defined the properties of currently available FSO technologies working in the near infrared or in the short infrared range of spectrum versus the performances of the developed system. The operation of this system was verified in three different test environments. The obtained results may also contain important issues related to the practical application of any FSO system.

4

Modelowanie kanału dla bezprzewodowej komunikacji optycznej w pomieszczeniu w oparciu o zmodyfikowany algorytm Monte Carlo

Kowalczyk M., Siuzdak J.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2018

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nr 8-9

826--830, CD

PL

Artykuł przedstawia sposób modelowania charakterystyk kanału optycznej komunikacji bezprzewodowej w pomieszczeniu, w tym jego odpowiedź impulsową i związane z nią parametry, przy użyciu do tego celu zmodyfikowanego algorytmu śledzenia promieni Monte Carlo.

EN

The article presents a way of modeling the channel characteristics of optical wireless communication therein the impulse response and related with it parameters, based on using the Modified Monte Carlo ray racing algorithm for this purpose.