Editorial
Analytical Noise-Variance Assessment of Receiver-Side Optical Filtering for Background-Noise Mitigation in Free-Space Optical Communication under Atmospheric Turbulence
@ARTICLE{10.4108/tsoe.14376, author={Van Cuu Ho and Leminhthien Huynh}, title={Analytical Noise-Variance Assessment of Receiver-Side Optical Filtering for Background-Noise Mitigation in Free-Space Optical Communication under Atmospheric Turbulence}, journal={EAI Endorsed Transactions on Transportation Systems and Ocean Engineering}, volume={2}, number={2}, publisher={EAI}, journal_a={TSOE}, year={2026}, month={10}, keywords={Free-space optical communication, Optical filtering, Noise variance, Atmospheric attenuation, Intelligent transportation systems, Maritime communications}, doi={10.4108/tsoe.14376} }- Van Cuu Ho
Leminhthien Huynh
Year: 2026
Analytical Noise-Variance Assessment of Receiver-Side Optical Filtering for Background-Noise Mitigation in Free-Space Optical Communication under Atmospheric Turbulence
TSOE
EAI
DOI: 10.4108/tsoe.14376
Abstract
Receiver-side optical filtering trades useful-signal attenuation against noise suppression in free-space optical communication. We analyse a 40 Gbps, 1.54 km OptiSystem link at 1552.52 nm using six filter responses. A normalized variance metric combines received power and signal-to-noise ratio. IIR, Gaussian and Bessel responses increase Q from 6.94 to 8.81–8.94 and signal-to-noise ratio from 16.83 to 18.90–19.03 dB. Under a fixed-gain signal-power interpretation, the inferred effective variance decreases by 45.81–46.50%; the individual background-noise contribution is not identified. Error rates near 10⁻¹⁹ are analyzer estimates. We clarify the fixed-loss channel assumption, derive a filter-benefit condition, and discuss hardware, adaptive selection, and potential transport and maritime applications. Outdoor validation and recovery of the original filter settings remain necessary.
Copyright © 2026 Van Cuu Ho et al., licensed to EAI. This is an open access article distributed under the terms of the CC BY-NC-SA 4.0, which permits copying, redistributing, remixing, transformation, and building upon the material in any medium so long as the original work is properly cited.