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<p>In this paper, a dual multiplexed configuration incorporating wavelength division multiplexing and spatial multiplexing for OFDM-RoFSO system is proposed. An 80 Gbps rate is achieved while considering four individual data streams for SCM–WDM dual multiplexed transmission. At WDM level, a carrier frequency of 193.1&#xa0;THz and 194.1&#xa0;THz is assigned and at SDM level, various spatial modes are assigned for individual data transmission. The RoFSO link performance is analyzed for different cloud conditions. The presence of liquid water content and droplet size is considered for analysis of link visibility and channel attenuation. The impact of turbulence conditions on FSO link performance is also analyzed. At receiver, BER and Q-factor is measured from eye diagram analysis. The SNR and received power is measured from electrical equivalent observed at detector output. The channel performance due to the combined effect of cloud attenuation and atmospheric turbulence conditions on FSO link is also analyzed.</p>

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\(80\text{ Gbps}\) WDM–SDM dual multiplexed radio over FSO transmission under different cloud conditions

  • 期刊论文

  • 发表日期：

    2025年3月31日

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  • Ankur Sood,
  • Rahul Kaushik

摘要

In this paper, a dual multiplexed configuration incorporating wavelength division multiplexing and spatial multiplexing for OFDM-RoFSO system is proposed. An 80 Gbps rate is achieved while considering four individual data streams for SCM–WDM dual multiplexed transmission. At WDM level, a carrier frequency of 193.1 THz and 194.1 THz is assigned and at SDM level, various spatial modes are assigned for individual data transmission. The RoFSO link performance is analyzed for different cloud conditions. The presence of liquid water content and droplet size is considered for analysis of link visibility and channel attenuation. The impact of turbulence conditions on FSO link performance is also analyzed. At receiver, BER and Q-factor is measured from eye diagram analysis. The SNR and received power is measured from electrical equivalent observed at detector output. The channel performance due to the combined effect of cloud attenuation and atmospheric turbulence conditions on FSO link is also analyzed.