e sum of LTE + NR numbers of allocated RBs, denoted by RBtot. At large RB tot values, the waveform properties are simi- lar to those of Figure 12.19 (left); that is, spectral regrowth leads to A-MPR being ACLR dominated. On the other hand, as the number of RBs is reduced, the IMD products are EN-DC 20 MHz aggregated BW EN-DC 20 MHz aggregated BW LTE & 5G: 10 MHz Cell Bandwidth LTE & 5G: LTE: 10RB @ maximum offset position 10 MHz Cell Bandwidth 5G: 10RB @ minimum offset position 10RB @ minimum offset position n71 uplink band n71 uplink band f(MHz) (MHz) LTE"Tx NR"Tx, LTE"Tx NR"Tx, EN-DC carrier EN-DC carrier "Rx1" "Tx1" "Tx2" -10.0 "Rx1' " "Rx2" "Tx1' "Tx2' -20.0 -30.0 -10.0 -40.0 -20.0 -30.0 -60.0 -70.0 -50.0 Low LTE desensitization -60.0 Moderate to high Ander LTE desensitization Center 660.00 MHz Video BW 3.0 kHz* Span 100.0 MHz Center 663.50 MHz Span 90.00 MHz #Res BW 30 kHz Sweep 1.12s (1001 pts) #Res BW 10 kHz VBW 1.0 kHz* Sweep 9.062 S (1001 pts) Figure 12.19 5G EN-DC UE self-desensitization due to dual uplink transmissions VS. LTE/5G RB allocations. Left: LTE and 5G RBs nearly adjacent to each other. Right: LTE and 5G RBs positioned at their respective minimum offset position. Plte_sim <= 22 dBm Plte_sim <= 21 dBm Plte_sim <= 20 dBm Plte_sim <= 19 dBm Plte_sim <= 18 dBm Plte_sim <= 17 dBm Plte_sim <= 16 dBm Plte_sim <= 15 dBm Plte_sim <= 14 dBm Plte_meas =14 dBm Plte_meas =15 dBm Plte_meas =16 dBm Plte_meas =17 dBm (A): RBtot 40 Plte_meas =18 dBm (B): RBtot 10 Plte_meas =19 dBm (C): RBtot 2 Plte_meas =20 dBm Plte_meas =21 dBm (A) (B) Plte_meas =22 dBm P_Ite [dBm] RB [RB] Figure 12.20 Left: Simulated (lines) VS. measured (symbols or dots) NR A-MPR as function of RB tot for NR15_L5, NR QPSK configuration. A, B, and C slices correspond to RBtot tot = 2, 10, 40. Right: Measured maximum EN-DC total transmission power VS. P LTE for slices A, B, and C. 12.5 Dual Uplink Performance Challenges for NSA Operation 5G dropping allowed 5G dropping allowed P_Ite [dBm] P_Ite [dBm] 5G dropping allowed P_Ite [dBm] Figure 12