Position-Error Compensation Method for FSO using Two-Step Search

Jong Min Kim, Ju Hyung Lee, Young Chai Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution


To make free space optical (FSO) communications practically used, robust beam alignment techniques are essential. In a general beam alignment process, the transmitter gets the receiver's location from the ground positioning system (GPS) but an additional compensating algorithm should be developed due to the error of GPS. In this paper, we propose a beam alignment algorithm using the property of Gaussian beam by dividing beam searching routes into two steps. We carry out numerical simulations to validate the proposed scheme comparing it to the Max power detection algorithm. From the results, we found that the proposed algorithm improves the detection accuracy by 50% in terms of the prediction distance error. We conclude that the proposed technique shows an advanced performance even under the severe channel fluctuations.

Original languageEnglish
Title of host publicationICTC 2021 - 12th International Conference on ICT Convergence
Subtitle of host publicationBeyond the Pandemic Era with ICT Convergence Innovation
PublisherIEEE Computer Society
Number of pages3
ISBN (Electronic)9781665423830
Publication statusPublished - 2021
Event12th International Conference on Information and Communication Technology Convergence, ICTC 2021 - Jeju Island, Korea, Republic of
Duration: 2021 Oct 202021 Oct 22

Publication series

NameInternational Conference on ICT Convergence
ISSN (Print)2162-1233
ISSN (Electronic)2162-1241


Conference12th International Conference on Information and Communication Technology Convergence, ICTC 2021
Country/TerritoryKorea, Republic of
CityJeju Island

Bibliographical note

Funding Information:
ACKNOWLEDGEMENT This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government(MSIT)(NRF-2020R1A4A1019628)

Publisher Copyright:
© 2021 IEEE.

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications


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