We investigate hybrid free-space optical (FSO) link in converged baseband and 60-GHz radio-frequency signals under adverse climate conditions. In this approach, optical double-sideband with carrier method is utilized. The adoption of such an FSO system can be contributed to existing fiber-optic architecture. Managing the signal strength by erbium-doped fiber amplifier, deployment of the system serves the data rate of 2.5 Gb / s to fiber-optic and pico/femto-cellular users concurrently. Our paper studies the impact of rainfall, snowfall, and fog-visibility with the maximum value of 250 mm / h, 10 mm / h, and 1.5 km, respectively. System performance is relatively evaluated for an optical wireless range of 1 km and back-to-back connection. For the bit error rate (BER) of ∼10 − 9, the receiver sensitivity in range of −25.06 to −24.86 dBm for wired and −23.48 to −23.06 dBm for wireless is obtained. The BER analysis shows effective FSO transmission up to 1 km in the rainy season and up to half a kilometer in frequent fog and snow events. The investigation reports the notable power margin for deploying a hybrid optical link in areas where fog or snow impact is higher than rain.

中文翻译：

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研究天气对混合自由空间光链路上有线和无线千兆位服务融合的影响

我们研究了恶劣气候条件下融合基带和60 GHz射频信号中的混合自由空间光（FSO）链路。在这种方法中，利用了带有载波的光学双边带方法。采用这样的FSO系统可以为现有的光纤架构做出贡献。通过掺b光纤放大器管理信号强度，系统的部署同时为光纤和微微/毫微微蜂窝用户提供2.5 Gb / s的数据速率。我们的论文研究了降雨，降雪和雾能见度的影响，最大值分别为250 mm / h，10 mm / h和1.5 km。对于1 km的光学无线范围和背对背连接，系统性能进行了相对评估。对于约10 − 9的误码率（BER），接收器灵敏度在−25.06至−24的范围内。有线获得86 dBm，无线获得-23.48至-23.06 dBm。BER分析显示，在雨季，FSO的有效传输距离可达1 km，而在频繁的雾天和雪灾事件中，其传输距离可达半公里。调查报告指出，在雾或雪影响大于雨的地区部署混合光链路的功率裕度显着。