# 6G Network Architecture Using FSO-PDM/PV-OCDMA System with Weather Performance Analysis
## 6 Conclusions  
A new 160 Gbps FSO communication is proposed by integrating PDM to OCDMA that uses PV code. Four different channels are used, each carries 20 Gbps, are transmitted on two orthogonal polarization states (x-polarization and y-polarization). Additionally, various weather conditions are considered to show the availability of applying the proposed system in different regions having different climates. These weathers are CA, fog (LF, MF, and HF), dust storms (LD, MD, and HD), and snowfall (WS and DS). Our proposed model is simulated under these weather conditions and the performance is carried out in terms of log (BER), Q-factor, and eye diagrams. The proposed model declares successful transmission of 160 Gbps with a maximum FSO range achieved under CA that is 7 km while the minimum is achieved under desert storms specific under HD and that is 0.112 km which is due to large attenuation caused by HD. Moreover, the FSO-PDM/PV-OCDMA system can transmit up to 1.525 km under LF. This range is slightly decreased to 1.05 km when the level of fog becomes medium, while at the heaviest level of fog, the shortest FSO link is achieved at 0.85 km and that is obvious as, under HF, the visibility is short while the attenuation is high. Further, as there are regions that have snow, we considered the performance of our suggested model under two types of snow that are WS and DS. Under WS, the system prolongs up to 1.15 km, while under DS, it prolongs up to 0.28 km. All these ranges are considered at the accepted value of BER (less than \(2.5\times 10^{-3}\)). Subsequently, the proposed FSO system can be implemented in 6G applications such as transmission of information between drones and buildings, vehicle-to-vehicle, hospitals, and hard-to-reach areas. In future works, practical experimentations of the proposed technique needs to be performed to better analyze the influence of real-time channel losses.  
Conceptualization, M.S. and S.A.A.E.-M.; methodology, M.S. and S.A.A.E.-M.; software, M.S. and S.A.A.E.-M.; validation, M.S., S.N.P. and S.A.A.E.-M.; formal analysis, M.S., S.N.P., A.A., K.A., M.A. and S.A.A.E.-M.; investigation, M.S. and S.A.A.E.-M.; resources, M.S. and S.A.A.E.-M.; writing--original draft preparation, M.S. and S.A.A.E.-M.; writing--review and editing, M.S. and S.A.A.E.-M.; visualization, M.S., S.N.P., A.A., K.A., M.A. and S.A.E.-M.; funding acquisition, A.A., K.A. and M.A. All authors have read and agreed to the published version of the manuscript. This work was funded by the Deanship of Scientific Research at Jouf University under grant No (DSR2022-NF-13).  
Not applicable.  
The authors declare no conflict of interest.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Reference**} & \multicolumn{2}{c}{
\begin{tabular}{c} **The Technique Used** \\ **in FSO System** \\ \end{tabular} } & \multirow{2}{*}{**Number of Channels**} & \multirow{2}{*}{**Overall Capacity**} & \multirow{2}{*}{**Weather Conditions**} \\ \hline
[17] & OFDM & 1 & 10 Gbps & CA \\
[16] & OAM-OCDMA using & 12 & 120 Gbps & CA, fog, haze, and rain \\
[14] & PDM-OCDMA using & 6 & 60 Gbps & CA, fog, haze, and rain \\  & EDW code & & & \\
[21] & PDM-OCDMA using & 10 & 100 Gbps & Fog \\  & RD code & & & \\ Present work & PDM-OCDMA using & 8 & 160 Gbps & CA, fog, dust storms, snowfall \\  & PV code & & & \\ \hline \hline \end{tabular}
\end{table}
Table 7: Comparison between present work and previous recent works.