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<p>In this article, we analyze the secrecy outage probability (SOP) performance of a dual-hop mixed free space optical—radio frequency (FSO-RF) decode-and-forward relay-based communication system where the FSO link undergoes the Fisher-Snedecor <i>ℱ</i>-distribution, and the RF link follows the Nakagami-m fading. The considered communication system is exposed to the eavesdroppers which are attempted to intercept the confidential signal through the FSO channel and RF channel, respectively. Considering the eavesdropper’s location, nonzero-boresight pointing errors and atmospheric turbulence, we deduce the closed-form expressions for the secrecy outage probability under three eavesdropping scenarios. Furthermore, the asymptotic approximations for the SOP are derived under three scenarios. Finally, Monte Carlo simulations are provided to corroborate the derived expressions. The results demonstrate that the secrecy performance of scenario-3 is worst in three scenarios. Moreover, the HD technology outperforms the IM/DD technology in different scenarios and conditions.</p>

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Secrecy outage probability performance of mixed FSO-RF systems with nonzero-boresight pointing errors under three eavesdropping scenarios

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Liqiang Han,
  • Yawei Wang

摘要

In this article, we analyze the secrecy outage probability (SOP) performance of a dual-hop mixed free space optical—radio frequency (FSO-RF) decode-and-forward relay-based communication system where the FSO link undergoes the Fisher-Snedecor ℱ-distribution, and the RF link follows the Nakagami-m fading. The considered communication system is exposed to the eavesdroppers which are attempted to intercept the confidential signal through the FSO channel and RF channel, respectively. Considering the eavesdropper’s location, nonzero-boresight pointing errors and atmospheric turbulence, we deduce the closed-form expressions for the secrecy outage probability under three eavesdropping scenarios. Furthermore, the asymptotic approximations for the SOP are derived under three scenarios. Finally, Monte Carlo simulations are provided to corroborate the derived expressions. The results demonstrate that the secrecy performance of scenario-3 is worst in three scenarios. Moreover, the HD technology outperforms the IM/DD technology in different scenarios and conditions.