## 6 Statistical Analysis of the System Loss Model
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**MN**} & \multirow{2}{*}{**SCN**} & \multirow{2}{*}{**LOS/NLOS**} & \multirow{2}{*}{**PDF**} & \multicolumn{4}{c}{**868 MHz NB**} & \multicolumn{4}{c}{**6489 MHz UWB**} \\ \cline{5-10}  & & & \(\mathbf{P_{1}}\) & \(\mathbf{P_{2}}\) & \(\boldsymbol{\chi^{2}}\) & \(\boldsymbol{r}\) & \(\mathbf{P_{1}}\) & \(\mathbf{P_{2}}\) & \(\boldsymbol{\chi^{2}}\) & \(\boldsymbol{r}\) \\ \hline \multirow{10}{*}{APR} & \multirow{5}{*}{LOS} & Rice & 0.831 & 0.503 & 8.47 & 0.87 & 0.925 & 0.341 & 6.56 & 0.89 \\  & & Nakagami-\(m\) & 1.640 & 1.196 & 8.71 & 0.90 & 2.611 & 1.088 & 5.98 & 0.92 \\  & & Weibull & 1.135 & 2.441 & 8.34 & 0.88 & 1.106 & 3.117 & 6.19 & 0.87 \\  & & Rayleigh & 0.773 & - & 8.14 & 0.89 & 0.738 & - & 4.70 & 0.75 \\  & & **Lognormal** & \(\mathbf{-0.078}\) & **0.399** & **5.95** & **0.98** & \(\mathbf{-0.060}\) & **0.313** & **4.21** & **0.98** \\ \cline{2-10}  & & \multirow{5}{*}{NLOS} & Rice & 0.049 & 0.811 & 12.54 & 0.91 & 0.915 & 0.422 & 9.63 & 0.93 \\  & & [PERSON]-\(m\) & 1.277 & 1.317 & 15.15 & 0.91 & 1.879 & 1.194 & 8.76 & 0.97 \\  & & [PERSON] & 1.166 & 2.146 & 13.89 & 0.91 & 1.148 & 2.797 & 9.41 & 0.95 \\  & & Rayleigh & 0.811 & - & 12.54 & 0.91 & 0.773 & - & 7.44 & 0.87 \\  & & **Lognormal** & \(\mathbf{-0.082}\) & **0.464** & **10.57** & **0.99** & \(\mathbf{-0.056}\) & **0.400** & **9.05** & **0.99** \\ \hline \multirow{10}{*}{APR} & \multirow{5}{*}{LOS} & Rice & 0.815 & 0.510 & 13.59 & 0.87 & 0.917 & 0.378 & 4.20 & 0.87 \\  & & [PERSON]-\(m\) & 1.607 & 1.184 & 13.92 & 0.91 & 2.219 & 1.127 & 3.68 & 0.92 \\  & & [PERSON] & 1.128 & 2.411 & 13.47 & 0.89 & 1.121 & 2.941 & 4.08 & 0.88 \\  & & [PERSON] & 0.769 & - & 7.98 & 0.88 & 0.751 & - & 3.15 & 0.80 \\  & & **Lognormal** & \(\mathbf{-0.087}\) & **0.405** & **8.98** & **0.97** & \(\mathbf{-0.061}\) & **0.348** & **4.58** & **0.98** \\ \cline{2-10}  & & \multirow{5}{*}{NLOS} & [PERSON] & 0.040 & 0.840 & 13.59 & 0.90 & 0.911 & 0.428 & 14.22 & 0.91 \\  & & [PERSON]-\(m\) & 1.107 & 1.414 & 15.23 & 0.89 & 1.860 & 1.195 & 13.23 & 0.95 \\  & & [PERSON] & 1.186 & 1.977 & 13.35 & 0.90 & 1.148 & 2.770 & 13.90 & 0.92 \\  & & [PERSON] & 0.841 & & 13.58 & 0.90 & 0.773 & 4.38 & 0.87 \\  & & **Lognormal** & \(\mathbf{-0.084}\) & **0.498** & **12.86** & **0.99** & \(\mathbf{-0.057}\) & **0.398** & **5.58** & **0.99** \\ \hline \hline \end{tabular}
\end{table} 
Table 5: The parameters of PDFs fitted to empirical distributions of small-scale fading amplitudes for AB\({}_{\text{L}}\). Considering the NB channel, the SEE and the ME values are similar across different MN placements and scenarios. The ME values are negative and within the range of \([-1.1;\,-0.7]\) dB. The SEE values are less than 8 dB for all analyzed scenarios and are within the range of \([6.1;7.3]\) dB. For the UWB channel, the ME values are negative and are in the range of \([-0.8;\,-0.3]\). This indicates a small overestimation of the system loss according to the model. The values of the SEE are less than 8 dB for all scenarios and are in the range of \([4.9;7.0]\) dB. Based on the obtained results, it was found that the developed model accurately describes the distribution of the system loss for the NB and UWB channels, operating at 868 MHz and 6489 MHz, respectively. In Table 7, the general parameters of the channel model described by Equation (7) for LOS/NLOS conditions are presented. It is possible to use a generalized model in which the given ranges can be reduced to a single parameter value, by calculating the mean of its limit values. More detailed parameters of the model, which depend on the MN placements and scenarios, are given in Tables 1-5.