Modeling Optical Key Distribution over a Satellite-to-Ground Link Under Weak Atmospheric Turbulence
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908511165743104 |
|---|---|
| author | Czerwinski, Artur Lasota, Mikołaj Jarzyna, Marcin Kucharczyk, Mateusz Jachura, Michał Banaszek, Konrad |
| author_facet | Czerwinski, Artur Lasota, Mikołaj Jarzyna, Marcin Kucharczyk, Mateusz Jachura, Michał Banaszek, Konrad |
| contents | In this study, we analyze the secret key capacity of intensity modulation/direct detection optical key distribution (IM/DD OKD) for a free-space optical (FSO) link between a low-Earth orbit satellite and an optical ground station. Focusing on downlink communication, we account for atmospheric turbulence, which causes random variations in the transmittance of the FSO channel. We implement an atmospheric channel model that accounts for absorption and scattering, geometric losses, pointing errors, and intensity fluctuations. The secret key capacity is quantified under different noise scenarios and reconciliation code efficiencies, assuming a hard decoding scheme. The performance of the IM/DD OKD protocol is compared under direct and reverse reconciliation regimes. Additionally, we examine the impact of weak and strong wind on the strength of atmospheric turbulence, leading to different results of the secret key capacity. Furthermore, we analyze the characteristics of error distributions that arise from protocol optimization. Our results provide insights into optimizing IM/DD OKD protocols for varying atmospheric conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_05807 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Modeling Optical Key Distribution over a Satellite-to-Ground Link Under Weak Atmospheric Turbulence Czerwinski, Artur Lasota, Mikołaj Jarzyna, Marcin Kucharczyk, Mateusz Jachura, Michał Banaszek, Konrad Optics Applied Physics Space Physics In this study, we analyze the secret key capacity of intensity modulation/direct detection optical key distribution (IM/DD OKD) for a free-space optical (FSO) link between a low-Earth orbit satellite and an optical ground station. Focusing on downlink communication, we account for atmospheric turbulence, which causes random variations in the transmittance of the FSO channel. We implement an atmospheric channel model that accounts for absorption and scattering, geometric losses, pointing errors, and intensity fluctuations. The secret key capacity is quantified under different noise scenarios and reconciliation code efficiencies, assuming a hard decoding scheme. The performance of the IM/DD OKD protocol is compared under direct and reverse reconciliation regimes. Additionally, we examine the impact of weak and strong wind on the strength of atmospheric turbulence, leading to different results of the secret key capacity. Furthermore, we analyze the characteristics of error distributions that arise from protocol optimization. Our results provide insights into optimizing IM/DD OKD protocols for varying atmospheric conditions. |
| title | Modeling Optical Key Distribution over a Satellite-to-Ground Link Under Weak Atmospheric Turbulence |
| topic | Optics Applied Physics Space Physics |
| url | https://arxiv.org/abs/2508.05807 |