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<p>Numerous applications in the telecommunications sector have drawn a lot of interest in free space optics (FSO), and every researcher and telecoms association hopes to make FSO a viable substitute for fiber optics as a last-mile solution. The rain effect across various FSO link types under simulated rainy meteorological circumstances is the primary concern of this article. In this research, receiver diversity methods such as Single Input Multiple Output (SIMO) have been studied for system analysis in rainy conditions, in addition to the Single Input and Single Output (SISO) link of FSO. The optical power attenuation has been studied under various rain rate situations, compared with other standard models, in addition to the system performance analysis. In a high rain rate scenario, the higher order SIMO (1 × 4) outperforms the SISO, and lower order considered SIMO systems with respect to real-time eye pattern, SNR, and BER performance. According to the experimental results, at high rain rate conditions (60&#xa0;mm/hr), a 1 × 4 SIMO system may boost SNR by 1.4 times when compared to a SISO link.</p>

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FSO System Performance Improvement Strategy in Rainy Weather Conditions Utilizing Receiver Diversity Schemes: An Experimental Study

  • 期刊论文

  • 发表日期：

    2026年6月3日

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  • Shibabrata Mukherjee,
  • Sujoy Paul,
  • Saswati Mazumdar

摘要

Numerous applications in the telecommunications sector have drawn a lot of interest in free space optics (FSO), and every researcher and telecoms association hopes to make FSO a viable substitute for fiber optics as a last-mile solution. The rain effect across various FSO link types under simulated rainy meteorological circumstances is the primary concern of this article. In this research, receiver diversity methods such as Single Input Multiple Output (SIMO) have been studied for system analysis in rainy conditions, in addition to the Single Input and Single Output (SISO) link of FSO. The optical power attenuation has been studied under various rain rate situations, compared with other standard models, in addition to the system performance analysis. In a high rain rate scenario, the higher order SIMO (1 × 4) outperforms the SISO, and lower order considered SIMO systems with respect to real-time eye pattern, SNR, and BER performance. According to the experimental results, at high rain rate conditions (60 mm/hr), a 1 × 4 SIMO system may boost SNR by 1.4 times when compared to a SISO link.