## 5 Conclusions  
The full duplex RoF model is considered a fruitful solution in current era to support maximum number of users including video based services. Therefore, in this paper a full duplex WDM based RoF model is projected in terms of hybrid coupling mechanism. The prominent factors like NLIs and PAPRIs are studied and minimized in this presented model. The background of the proposed model is analyzed with RF and optical domain infrastructure. Mathematical model is investigated to explore the originality of transmitted signals, the discontinuity of pulses due to optical domain and electrical domain related issues like NLIs, and PAPRIs, using the proposed analytical model. The presented results are investigated in terms of 1 km to 10 km of transmission range 4 and 6 GHz of RF magnitudes, input power between -20 to 0 dBm, received power with \(-40\) to \(-18\) dBm values and 0 to 8 normalized to signal noise ratio. It is concluded that there is a clear difference among with suppressed NLIs, and PAPRIs and without managed NLIs and PAPRIs.  
Data curation--H.Y.; Formal analysis--S.T., A.A., F.M. and F.A. ([PERSON]); Funding acquisition--H.Y., S.T. and N.A.; Investigation--F.A. ([PERSON]), S.T., A.A., F.M., F.A. ([PERSON]) and K.H.; Methodology-A.A. and F.M.; Project administration--F.A. ([PERSON]); Resources--F.A. ([PERSON]) and K.H.; Software-F.A. ([PERSON]) and K.H.; Supervision--A.A.; Visualization--F.M., F.A. ([PERSON]) and N.A.; Writing--original draft, H.Y. and F.A. ([PERSON]); Writing--review & editing, S.T., H.K., A.A. and F.M. All authors have read and agreed to the published version of the manuscript.  
This work is supported in part by the Beijing Natural Science Foundation (No. 4212015), Natural Science Foundation of China (No. 61801008), China Ministry of Education-China Mobile Scientific Research Foundation (No. MCM20200102), China Postdoctoral Science Foundation (No.  
\begin{table}
\begin{tabular}{l c c c} \hline \hline
**Parameter Description** & [37] & [38] & **Presented RoF Model** \\ \hline Modulation scheme & OFDM & 64-QAM & Dual drive and dual port liNb MZM \\ Received power (dBm) & \(-35\) to \(-25\) dBm & \(-40\) to \(-22\) dBm & \(-36\) to \(-18\) dBm \\ Input Power (dBm) & \(-22\) to \(-3\) dBm & \(-23\) to \(-2\) dBm & \(-20\) to \(-0\) dBm \\ Input Power (dBm) & \(-22\) to \(-3\) dBm & \(-23\) to \(-2\) dBm & \(-20\) to \(-0\) dBm \\ Length & 6 km & 8 km & 10 km \\ BER & \(1.4\times 10^{-3}\) & \(2\times 10^{-5}\) & \(4.1\times 10^{-7}\) \\ \hline \hline \end{tabular}
\end{table}
Table 2: Correlation of proposed framework with existed models.  
Figure 17: RF spectrum analyzer; (**a**): Input signals, (**b**): NLIs and PAPRIs interrupted signals, (**c**): Interrupted signals due to NLIs, and PAPRIs at length = 5 km and RF = 4 GHz, (**d**): Output signals with addressed NLIs, and PAPRIs with length = 5 km and RF = 4 GHz.  
2020M670074), Beijing Municipal Commission of Education Foundation (No. KM201910005025), China National Key Research and Development Program (No. 2018 YFB0803600).  
Not applicable.  
Data Availability Statement: Data will be available as per request.  
This work is supported in part by the Beijing Natural Science Foundation (No. 4212015), Natural Science Foundation of China (No. 61801008), China Ministry of Education-China Mobile Scientific Research Foundation (No. MCM20200102), China Postdoctoral Science Foundation (No. 2020M670074), Beijing Municipal Commission of Education Foundation (No. KM201910005025), China National Key Research and Development Program (No. 2018 YFB0803600).