4.6 Article

Experimental real-time GbE MIMO FSO under fog conditions with software defined GNU Radio platform-based adaptive switching

期刊

出版社

Optica Publishing Group
DOI: 10.1364/JOCN.458562

关键词

Optical switches; MIMO communication; Optical fiber communication; Adaptive systems; Adaptive optics; Optical feedback; Optical transmitters

资金

  1. Intensive Industrial Innovation Program Northeast [25R17P01847]
  2. European Regional Development Fund
  3. European Union COST Action [CA19111 NEWFOCUS, SGS20/166/OHK3/3T/13]
  4. Isocom

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This paper demonstrates the experimental implementation of a gigabit Ethernet free space optical (FSO) communications link with adaptive switching using GNU Radio and analyzes its performance. The proposed switching mechanism improves the link performance under different fog conditions and is compared with a single FSO link.
In this paper, we demonstrate the first, to our knowledge, experimental implementation of a gigabit Ethernet multiple input single output free space optical (FSO) communications link using adaptive switching implemented in the software defined open-source software, GNU Radio, and analyze its performance. A fully functional FSO link with a feedback path is implemented using cost effective off-the-shelf components, i.e., media converters and small form-factor pluggable modules. We propose a switching mechanism at the transmitter to improve the link performance under different fog conditions and provide results for the proposed FSO system compared with a single FSO link. The real-time channel estimation is demonstrated and, based on the channel state information, adaptive switching is carried out in GNU Radio. We show that the proposed system under the heavy fog condition offers almost the same packet error rate under the clear channel but with a reduced data rate by about 100 Mbps (i.e., 600 Mbps). (C) 2022 Optica Publishing Group

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