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EDFA Controlled Spectral Efficient MIMO Free Space Optic Links for Mitigation of Climatic Turbulence Conditions

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Abstract

Free space optical communication (FSO) employs an optical setup to transmit the message signal directly through the air from the source to the receiver. While FSO offers several advantages, its effectiveness for long-distance transmission is hindered by the impact of climate change and pointing error. To address this challenge, this study focuses on improving the efficiency of FSO systems in terms of channel capacity and long-distance communication. To achieve this objective, a 32-channel wavelength division multiplexing (WDM) FSO approach, along with pre- and post-amplification techniques using erbium-doped fiber amplifier (EDFA), and a multiple-input multiple-output (MIMO) technique, have been employed. Furthermore, the proposed framework is evaluated using various modulation schemes, such as gaussian pulse generator (GA), return to zero (RZ), and non-return to zero (NRZ). The proposed system has achieved a channel capacity of 320 Gbps. The proposed system achieves extended transmission ranges: 35 km under clear conditions, 1.37 km under foggy conditions, and 2.53 km under rainy conditions. Furthermore, we formulate a closed-form expression for the bit error rate (BER) in the MIMO FSO system. The performance is evaluated in terms of BER and quality factor (Q Factor). The proposed system outperforms existing designs in terms of transmission range and spectrum efficiency.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, India

    Yogesh Kumar Gupta & Aditya Goel

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  1. Yogesh Kumar Gupta
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  2. Aditya Goel
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Yogesh Kumar Gupta: Conception and design, Manuscript preparation.Aditya Goel: Supervision and final approval.

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Correspondence to Yogesh Kumar Gupta.

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Gupta, Y.K., Goel, A. EDFA Controlled Spectral Efficient MIMO Free Space Optic Links for Mitigation of Climatic Turbulence Conditions. Wireless Pers Commun 132, 2563–2585 (2023). https://doi.org/10.1007/s11277-023-10732-6

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