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Optical and Quantum Electronics

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01-06-2019

Effect of wind pressure and modulation schemes on rain interrupted optical wireless links under tropical climates

Authors: Gireesh G. Soni, Abhishek Tripathi, Abhilash Mandloi, Shilpi Gupta

Published in: Optical and Quantum Electronics | Issue 6/2019

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Abstract

Tropical and subtropical regions experience heavy rain intensities often accompanied with medium to strong winds. In this work, the effect of perpendicular wind flow and various modulation formats on a rain interrupted optical wireless link is investigated experimentally under controlled laboratory conditions. Attenuation as a function of rain rate is observed at different wind pressure. It is found that rain induced scattering dominates the rain specific attenuation however significant attenuation is expected at much higher wind pressure which normally increases with altitudes. A comparative performance of modulation formats like direct intensity modulation (D-IM), pulse width modulation (PWM) and various subcarrier intensity modulated (SIM) signals under heavy rain conditions is reported. It is found that SIM-FSK and SIM-AM offer better signal to noise performance (approximately two times) followed by subcarrier phase (SIM-PM) and frequency (SIM-FM) respectively. Also, SIM-FSK and PWM are least attenuated in heavy precipitation.

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Title: Effect of wind pressure and modulation schemes on rain interrupted optical wireless links under tropical climates
Authors: Gireesh G. Soni
Abhishek Tripathi
Abhilash Mandloi
Shilpi Gupta
Publication date: 01-06-2019
Publisher: Springer US
Published in: Optical and Quantum Electronics / Issue 6/2019
Print ISSN: 0306-8919
Electronic ISSN: 1572-817X
DOI: https://doi.org/10.1007/s11082-019-1893-x

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