## 3 Results
### Simulation Results  
The system parameters mentioned in this section were used in the MC simulations of 5000 snapshots for each scenario. Table 3 depicts the FSS-ES parameters. An interference-to-noise ratio (INR) of \(-\)12.2 dB was chosen as the threshold noise level for the specified  
Figure 14: FSS for 85 m (extended C-Band + Filter-2, 100 MHz GB). Figure 15: FSS for 85 m (extended C-Band + Filter-5 100 MHz GB no download). parameters. Figure 16 shows the INR cumulative distribution function (CDF) at 15\({}^{\circ}\) elevation angle via 5G-BS in co-channel interference. The vertical black line is the threshold noise level and is used to define the interference. Each plotline indicates a CDF for 10, 20 and 35 km protection distances, and the probability of having an INR lower than \(-\)12.2 dB is 39.1%, 62.8%, and 97.4%, respectively. Therefore, Equation (16) is used to calculate the result. However, most radio communication techniques should have a similar level of reliability, which should be more than 95%. The corrected interference of less than 5% should be acceptable. \[P_{1}=1-P(INR<-12.2) \tag{16}\]  
A correlation was found between the 5G-BS elevation and the interference probability, so further investigation was conducted. Let us suppose an INR lower than \(-\)12.2 dB, where the probability 'P INR \(>-\)12.2 dB' is higher and should maintain the interference probability below 5%. Thus, a minimum distance of 35 km is needed to maintain the INR of \(-\)12.2 dB, as shown in Figure 16. Significant changes were observed on the CDF plotlines, which were more than the INR value of \(-\)12.2 for 10, 20, and 35 km at the 5G-BS elevation angles of 15\({}^{\circ}\), 20\({}^{\circ}\), and 30\({}^{\circ}\), as shown in Figure 16.  
The CDF is shown in Figure 17 when the protection distance is 10 km. However, the plotlines show that the CDF changes the INR for 5G-BS at a 15\({}^{\circ}\) elevation angle. The plotline illustrates the CDF difference over INR at 20\({}^{\circ}\) and 30\({}^{\circ}\) elevation angles of the 5G-BS. However, the estimated probability is significant at 69% and 97.6% when the 5G-BS elevation angles are 20\({}^{\circ}\) and 30\({}^{\circ}\), respectively. The elevation angles of 5G-BS are increased from 15\({}^{\circ}\) to 20\({}^{\circ}\) and from 0\({}^{\circ}\) to 30\({}^{\circ}\). The 29.8% and 27.3% increase in the probability of achieving an INR of less than \(-\)12.2 dB was observed. The interference probability is decreased by 27.4% and 29.9%. Figure 18 shows the CDF probability for a 20 km protection distance. The plotline represents the CDF variation across the INR for a 5G-BS elevation angle of 15\({}^{\circ}\). With the 5G-BS elevation angles of 20\({}^{\circ}\) and 30\({}^{\circ}\), the CDF variation across the INR is shown in the plotlines. The CDF across the INR changes depending on the 5G-BS elevation angles of 20\({}^{\circ}\) and 30\({}^{\circ}\) within the protection distance of 20 km. However, the changing of the 5G-BS elevation angle may relieve the limitation on the protection distance if the protection distance cannot be maintained effectively. Figure 16: Co-channel interference scenario for the INR CDF is evaluated on the basis of the protection distance. As shown in Figure 19, the interference probability lowered by 59.5% when the elevation angle of 5G-BS was adjusted from 15\({}^{\circ}\) to 30\({}^{\circ}\) at a 35 km protection distance [31]. However, the interference probability decreased by only 20.4% at a protective distance of 35 km. The interference probability increases with the decrease in protection distance due to the difference in the elevation angle of 5G-BS [32]. The CDF of adjacent interference probability is shown in Figure 20 and is obtained by using the spectrum emission mask for a protection distance of 0.6 km. The additional values are addressed in Table 10, where the cells did not extend beyond. The INR of \(-\)12.2 dB is the number of interferences detected at a protective distance of 0.6 km.