Performance Analysis of Passive Retro-Reflector Based Tracking in Free-Space Optical Communications with Pointing Errors

Abstract
In this correspondence, we propose a diversity-achieving retroreflector-based fine tracking system for free-space optical (FSO) communications. We show that multiple retroreflectors deployed around the communication telescope at the aerial vehicle save the payload capacity and enhance the outage performance of the fine tracking system. Through the analysis of the joint-pointing loss of the multiple retroreflectors, we derive the ordered moments of the received power. Our analysis can be further utilized for studies on multiple input multiple output (MIMO)-FSO. After the moment-based estimation of the received power distribution, we numerically analyze the outage performance. The greatest challenge of retroreflector-based FSO communication is a significant decrease in power. Still, our selected numerical results show that, from an outage perspective, the proposed method can surpass conventional methods.

Citation
Moon, H.-J., Chae, C.-B., & Alouini, M.-S. (2023). Performance Analysis of Passive Retro-Reflector Based Tracking in Free-Space Optical Communications with Pointing Errors. IEEE Transactions on Vehicular Technology, 1–6. https://doi.org/10.1109/tvt.2023.3255894

Acknowledgements
This work was supported in part by Institute of Information & communications Technology Planning & Evaluation (IITP) grant funded by the Korea government (MSIT) (2019-0-00685 and 2022-0-00704).

Publisher
Institute of Electrical and Electronics Engineers (IEEE)

Journal
IEEE Transactions on Vehicular Technology

DOI
10.1109/tvt.2023.3255894

Additional Links
https://ieeexplore.ieee.org/document/10066845/

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