# Evaluation of Radio Communication Links of 4G Systems
## 4 Results and Discussion
### Debit  
The debit of the user is higher than 3G (downlink of more than 300 Mbps against 14 Mbps in UMTS). The supported user rate must match the bandwidth spectrum. Figure 11: SINR distribution: (**a**) before treatment; (**b**) after treatment. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Range** & \multicolumn{2}{c}{**SINR (dB)**} \\ \hline  & **Before Treatment** & **After Treatment** \\ \hline
[min, 0] & 13,329 (5.88\%) & 31 (00.52\%) \\
[0, 5] & 30,892 (13.62\%) & 335 (05.60\%) \\
[5, 10] & 43,021 (18.96\%) & 1020 (17.05\%) \\
[10, 15] & 47,730 (21.04\%) & 1507 (25.19\%) \\
[15, 30] & 89,536 (39.47\%) & 3088 (51.62\%) \\
[30, Max] & 2341 (01.03\%) & 1 (00.02\%) \\ \hline \hline \end{tabular}
\end{table} 
Table 3: SINR values before and after treatment. For the downlink rate, the eUTRAN can use tow transmitters' antennas for the eNB and tow receivers' antennas for the UE. The obtained results of PDSCH (physical downlink shared channel) physical throughout before and after treatment are given in Figure 13.  
The obtained values of PDSCH physical throughout before and after treatment are given in Table 4:  
Figure 12: Histogram’s distribution of SINR (before and after treatment). Figure 13: PDSCH physical throughout: (**a**) before treatment; (**b**) after treatment. The histogram's distribution of PDSCH before and after treatment is presented in Figure 14.  
The aim is the amelioration of the downlink debit. According to Figure 14 and Table 4, there is amelioration in all ranges of the downlink debit. The best amelioration is in the range of [10, 20] Mbps and the value of the amelioration is 63,461 kbps. In the ranges of [0, 4] Kbps, [4, 5] Kbps, [5, 10] Kbps, [20, 40] Kbps, [40, 60] Kbps, and [60, 70] Kbps, the ameliorations are 22,851 kbps, 2240 kbps, 24,046 kbps, 59,438 kbps, 7814 kbps, and 1350 kbps, respectively. The weak amelioration is in the range of [>70] Kbps (amelioration of 498 kbps). For the uplink, the obtained results of PUSCH (physical uplink shared channel) physical throughout before and after treatment are given in Figure 15.  
The obtained values of PUSCH physical throughout before and after treatment are given in Table 5: \begin{table}
\begin{tabular}{c c c} \hline \hline
**Range (Mbps)** & \multicolumn{2}{c}{**PDSCH (Kbps)**} \\ \hline  & **Before Treatment** & **After Treatment** \\ \hline
[0, 4] & 719 (12.07\%) & 23,570 (12.42\%) \\
[4, 5] & 2053 (34.47\%) & 4293 (02.26\%) \\
[5, 10] & 2053 (34.47\%) & 26,099 (13.76\%) \\
[10, 20] & 1966 (33.01\%) & 65,427 (34.49\%) \\
[20, 30] & 804 (13.50\%) & 60,242 (31.76\%) \\
[30, 40] & 405 (06.80\%) & 60,242 (31.76\%) \\
[40, 50] & 405 (06.80\%) & 8219 (04.33\%) \\
[50, 60] & 9 (00.15\%) & 8219 (04.33\%) \\
[60, 70] & 9 (00.15\%) & 1359 (00.72\%) \\
[70, Max] & 0 (0\%) & 498 (00.26\%) \\ \hline \hline \end{tabular}
\end{table} 
Table 4: PDSCH physical values before and after treatment. Figure 14: Histogram’s distribution of PDSCH (before and after treatment). The histogram's distribution of PUSCH before and after treatment is presented in Figure 16.  
Additionally, there is amelioration in all ranges of the uplink debit. According to Figure 16 and Table 5, the best amelioration is in the range of [15, 25] Mbps and the  
Figure 16: Histogram’s distribution of PUSCH (before and after treatment). Figure 15: PUSCH physical throughout: (**a**) before treatment; (**b**) after treatment. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Range (Mbps)** & \multicolumn{2}{c}{**PUSCH (Kbps)**} \\ \hline  & **Before Treatment** & **After Treatment** \\ \hline
[0, 0.512] & 140 (2.28\%) & 1594 (4.46\%) \\
[0.512, 2] & 407 (6.64\%) & 2747 (7.69\%) \\
[2, 3] & 365 (5.96\%) & 1344 (3.76\%) \\
[3, 10] & 2614 (42.66\%) & 10,460 (29.28\%) \\
[10, 15] & 1025 (16.73\%) & 5384 (15.07\%) \\
[15, 25] & 1573 (25.67\%) & 13,727 (38.43\%) \\
[25, Max] & 3 (0.05\%) & 466 (1.3\%) \\ \hline \hline \end{tabular}
\end{table} 
Table 5: PUSCH physical values before and after treatment. value of the amelioration is 12,154 Kbps.