Impact of Spatial Diversity on Hybrid DWDM-FSO System under Adverse Weather Conditions
8th International Congress on Human-Computer Interaction, Optimization and Robotic Applications, ICHORA 2026, Ankara, Türkiye, 21 - 23 Mayıs 2026, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.1109/ichora69329.2026.11537100
- Basıldığı Şehir: Ankara
- Basıldığı Ülke: Türkiye
- Anahtar Kelimeler: Atmospheric attenuation, DWDM, EDFA, Free-space optical communication, MIMO, Spatial diversity
- Bursa Uludağ Üniversitesi Adresli: Evet
Özet
The 60 Gbps 8-channel hybrid Dense Wavelength Division Multiplexing (DWDM)-Free Space Optical (FSO) communication system under three weather conditions - clear air, heavy rain, and thick fog - is thoroughly examined in this work. In order to compensate for link losses, an FSO segment with Erbium Doped Fiber Amplifiers (EDFAs) is inserted between two single-mode fiber spans in the suggested system. Both Single-Input Single-Output (SISO) and $3 \times 3$ Multiple-Input MultipleOutput (MIMO) setups are simulated. Bit Error Rate (BER) and Q-factor are used to assess performance. The system maintains acceptable link quality up to 10 kilometers with 20 dB gain in clear air circumstances, and it can extend to 12 km with 25 dB, according to the results. In SISO systems, the viable FSO range significantly decreases in the presence of severe rain and dense fog. The benefit of spatial diversity in buffering severe weather circumstances is demonstrated by the $3 \times 3$ MIMO arrangement, which obtains a Q-factor of 5.34 under heavy rain and 6.01 under thick fog at the maximum tested distances, where SISO setups fall below the permitted threshold.