## 3 Simulation and Results
### Illustration  
An auxiliary example is presented for illustration purposes. For simplicity, this example considers two APs and two SNs; SN-2 can have a LoS connection with AP-1, and SN-1 may not have a LoS connection with any AP. Cell association based on the maximum RSS shows that SN-1 is served by AP-2, and SN-2 is served by AP-1. Table 4 summarizes the radio conditions for each SN. It should be noted that USE and CSE are equal because each cell serves a single SN. The properties of each ray received by SN-1 are then processed to form a CDL channel profile, called F, for NLoS. The parameters of profile F can be found in Table 5, where ZoD and ZoA are the zenith of departure and zenith of arrival, respectively. Other parameters, namely c\({}_{\text{ASD}}\), c\({}_{\text{ASA}}\), c\({}_{\text{ZSD}}\), and c\({}_{\text{ZSA}}\), represent the cluster angles spread (in degrees). XPR represents the cluster cross-polarization power ratio (in dB). Following parameter values in [34], cluster angles \begin{table}
\begin{tabular}{c c c} \hline \hline  & **SN-1** & **SN-2** \\ \hline Number of rays (propagation paths) & 24 & 33 \\ Channel type & NLoS & LoS \\ RSS (dBm) & \(-\)110.63 & \(-\)43.22 \\ SINR (dB) & \(-\)13.72 & 50.20 \\ USE/CSE (pps/Hz) & 0.060 & 16.677 \\ ASE (pps/Hz) & & 8.368 & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Radio conditions of SN 1 and SN 2. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Notation** & **Description** & **Unit** & **Value** \\ \hline - & Cells per site & Cells & 3 \\ \(f_{c}\) & Carrier frequency & GHz & 28 \\ BW & Channel bandwidth & MHz & 50 \\ NRB & Number of resource blocks & Blocks & 66 \\ \(SCS\) & Subcarrier spacing & KHz & 60 \\ Fr & Number of 10 ms frames & Frames & 40 \\ Kr & Ricean K-factor & dB & 13.3 \\ \(\varepsilon\) & Buildings permittivity & F/m & 3.75 \\ \(\sigma\) & Buildings conductivity & S/m & 0.038 \\ \(p_{\text{rx}}\) & Transmitter power & dBm & 44 \\ MT \(\times\) NT & Transmitter size, in case of terrestrial AP & - & \(8\times 8\) \\ \(h_{\text{BS}}\) & Transmitter height, in case of terrestrial AP & m & 10 \\ \(\alpha\)BS & Transmitter down-tilt, in case of terrestrial AP & degrees & 30 \\ mT \(\times\) nT & Transmitter size, in case of UAV & - & 2 \(\times\) 2 \\ \(\alpha\)UAV & Transmitter down-tilt, in case of UAV & degrees & 75 \\ \(S\) & Receiver sensitivity & dBm & \(-\)120 \\ MR \(\times\) NR & Receiver size & - & \(2\times 2\) \\ \(h_{UT}\) & Receiver height & m & 1.5 \\ \(\alpha\)R & Receiver up-tilt & degrees & 45 \\ \(G_{r}\) & SN antenna element gain & dBi & 0 \\ \(NF\) & SN noise figure & dB & 7 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Simulation parameters. spread and XPR are chosen as per Table 7.5-6, and cluster delays are scaled to obtain a desired delay spread (DS) of 66 ns as per Table 7.7.3-2. Another profile, called G, is defined for SN-2, which receives a LoS connection following a similar procedure. Cluster delays are scaled to obtain DS of 32 ns as per Table 7.7.3-2 in [34]. The parameters of profile G are presented in Table 6. Notably, the CDL model splits the first path into two components for LoS cases. Moreover, it is expected that the LoS ray will dominate the effects of other paths. Clusters with less than 25 dB power compared to the maximum cluster power can be removed, and the scaling factors do not need to be changed after cluster elimination [34]. After defining the CDL channel profiles F and G, the two profiles are used to compute their CQIs and the corresponding MCSs for 0.1 maximum BLER, considering Table 5.2.1-3 in [50].