termediate 21 dBm worst 21 dBm intermediate ACIR [dB] Figure 5.11 UL ACIR speech 24 dB: macro to macro. Capacity Loss 24 dBm (worst) 24 dBm (intermediate) 21 dBm (worst) 21 dBm (intermediate) ACIR [dB] Figure 5.12 UL data (144 kbps) macro to macro. When comparing the results illustrated Figures 5.11 and Figure 5.12, we can see that with lower ACIR values in speech, the capacity degrades much more than with the same ACIR values in data. The UTRA Transmission System 5.5.8 BTS Receiver Blocking 5.5.8.1 Simulation Results for 1 km Cell Radius Figure 5.13 shows the overall Cumulative Distribution Function (CDF) of the input signals to the receivers using 21 dBm terminals. Based on the preceding simulation as- sumptions and parameters, we can perceive that the largest signal appears at -54 dBm amplitude while occurring in less than 0.01% of the cases. Although simulations have not been done for a higher power terminal, according to [5] it is reasonable to assume approximated scaling of the power levels by 12 dB (i.e. from 21 to 33 dBm). Thus, it is proposed that -54 + 12 = -42 dBm should be considered a reasonable (if not slightly pessimistic) maximum value for the largest W-CDMA blocking signals. Signal Levels at BS (dBm) with Worst Case Geographic Offset Figure 5.13 BS signals levels [5]. 5.5.8.2 Simulation Results for 5 km Cell Radius Figure 5.14 illustrates the overall CDF of the input signals to the receivers using speech only. Discontinuity occurs, e.g. at -49 dBm input level because in large cells there are a few occurrences of users operating at their maximum transmitted power level of 21 dBm while remaining close enough to another network's cell to produce a minimum coupling loss condition. The UMTS Network and Radio Access Technology Probability of Occurrence Amplitude of Total Received Signal at BS (dBm) Figure 5.14 CDF of total signal for speech only system with 5 km cells and worst case geographic offset (after [5]). Therefore, for this large cell, the received signal power level corresponding to 99.99% of