Projects per year
Abstract
Free Space Optics (FSO) technology enabling next-generation near-Earth communication is prone to severe propagation losses due to atmospheric-turbulence-induced fading and Mie scattering (clouds). As an alternative to the real-time evaluation of the weather effects over optical signal, a state-of-the-art laboratory testbed for verification of slant APD-based (Avalanche Photodiode) FSO links in laboratory conditions is proposed. In particular, a hardware channel emulator representing an FSO channel by means of fiber-coupled Variable Optical Attenuator (VOA) controlled by driver board and software is utilized. While atmospheric scintillation data are generated based on Radiosonde Observation (RAOB) databases combined with a statistical design approach, cloud attenuation is introduced using Mie theory together with empirical Log-Normal modeling. The estimation of atmospheric-turbulence-induced losses within the emulated optical downlink is done with an FSO IM/DD prototype (Intensity Modulation/Direct Detection) relying on two different data throughputs using a transmitter with external and internal modulation. Moreover, the receiver under-test is a high-speed 10 Gbps APD photodetector with integrated Transimpedance Amplifier (TIA) typically installed in OGSs (Optical Ground Stations) for LEO/GEO satellite communication. The overall testbed performance is addressed by a BER tester and a digital oscilloscope, providing BER graphs and eye diagrams that prove the applied approach for testing APD-TIA in the presence of weather-based disruptions. Furthermore, the testbed benefits from the used beam camera that measures the quality of the generated FSO beam.
Original language | English |
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Article number | 1102 |
Journal | Electronics |
Volume | 11 |
Issue number | 7 |
DOIs | |
Publication status | Published - 1 Apr 2022 |
Keywords
- atmospheric turbulence
- cirrus
- clouds
- free-space optics (FSO)
- FSO channel emulator
- Mie scattering
- radiosonde observation (RAOB)
- satellite communication
- scintillations
ASJC Scopus subject areas
- Control and Systems Engineering
- Signal Processing
- Hardware and Architecture
- Computer Networks and Communications
- Electrical and Electronic Engineering
Fields of Expertise
- Information, Communication & Computing
- Advanced Materials Science
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COST Action CA19111: European Network on Future Generation Optical Wireless Communication Technologies
Bekhrad, P., Hatab, Z., Pezzei, P., Lamprecht, C., Leitgeb, E., Plank, T., Ivanov, H. D. & Liu, Y.
15/05/20 → 9/12/24
Project: Research project
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OptiKom-F - Optical Broadband-Communication through the Air
Plank, T., Pezzei, P., Kraus, D., Pock, C., Hinteregger, M., Brandl, P., Leitgeb, E., Henkel, M., Sheikh Muhammad, S., Zettl, K., Unterhuber, P., Saleem Awan, M., Liu, Y., Ivanov, H. D. & Bekhrad, P.
1/01/00 → 1/10/29
Project: Research project
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HybridPDT - System Study of Optical Communications with a Hybridised Optical/RF Payload Data Transmitter
Plank, T., Leitgeb, E., Pezzei, P., Ivanov, H. D., Kraus, D. & Bekhrad, P.
1/11/15 → 31/07/20
Project: Research project
Activities
- 1 Research at external institution
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Università degli Studi di Roma "La Sapienza"
Hristo Danchov Ivanov (Visitor)
2 Oct 2021 → 15 Oct 2021Activity: Visiting an external academic institution › Research at external institution